Index: doc/Object.3 =================================================================== diff -u -N -r216bad6f26882cfa3be0a4c37ce682ea312bf5c8 -r74410faa4683cf47d67e7aade09c132f6bf1f87d --- doc/Object.3 (.../Object.3) (revision 216bad6f26882cfa3be0a4c37ce682ea312bf5c8) +++ doc/Object.3 (.../Object.3) (revision 74410faa4683cf47d67e7aade09c132f6bf1f87d) @@ -1,75 +1,82 @@ '\" -'\" Generated from file 'Object.man' by tcllib/doctools with format 'nroff' -'\" Copyright (c) 2014 Stefan Sobernig , Gustaf Neumann ; available under the Creative Commons Attribution 3.0 Austria license (CC BY 3.0 AT). +'\" Generated from file 'Object\&.man' by tcllib/doctools with format 'nroff' +'\" Copyright (c) 2014 Stefan Sobernig , Gustaf Neumann ; available under the Creative Commons Attribution 3\&.0 Austria license (CC BY 3\&.0 AT)\&. '\" -'\" The definitions below are for supplemental macros used in Tcl/Tk -'\" manual entries. -'\" -'\" .AP type name in/out ?indent? -'\" Start paragraph describing an argument to a library procedure. -'\" type is type of argument (int, etc.), in/out is either "in", "out", -'\" or "in/out" to describe whether procedure reads or modifies arg, -'\" and indent is equivalent to second arg of .IP (shouldn't ever be -'\" needed; use .AS below instead) -'\" -'\" .AS ?type? ?name? -'\" Give maximum sizes of arguments for setting tab stops. Type and -'\" name are examples of largest possible arguments that will be passed -'\" to .AP later. If args are omitted, default tab stops are used. -'\" -'\" .BS -'\" Start box enclosure. From here until next .BE, everything will be -'\" enclosed in one large box. -'\" -'\" .BE -'\" End of box enclosure. -'\" -'\" .CS -'\" Begin code excerpt. -'\" -'\" .CE -'\" End code excerpt. -'\" -'\" .VS ?version? ?br? -'\" Begin vertical sidebar, for use in marking newly-changed parts -'\" of man pages. The first argument is ignored and used for recording -'\" the version when the .VS was added, so that the sidebars can be -'\" found and removed when they reach a certain age. If another argument -'\" is present, then a line break is forced before starting the sidebar. -'\" -'\" .VE -'\" End of vertical sidebar. -'\" -'\" .DS -'\" Begin an indented unfilled display. -'\" -'\" .DE -'\" End of indented unfilled display. -'\" -'\" .SO -'\" Start of list of standard options for a Tk widget. The -'\" options follow on successive lines, in four columns separated -'\" by tabs. -'\" -'\" .SE -'\" End of list of standard options for a Tk widget. -'\" -'\" .OP cmdName dbName dbClass -'\" Start of description of a specific option. cmdName gives the -'\" option's name as specified in the class command, dbName gives -'\" the option's name in the option database, and dbClass gives -'\" the option's class in the option database. -'\" -'\" .UL arg1 arg2 -'\" Print arg1 underlined, then print arg2 normally. -'\" -'\" RCS: @(#) $Id: man.macros,v 1.1 2009/01/30 04:56:47 andreas_kupries Exp $ -'\" -'\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages. +.TH "nx::Object" 3 2\&.0\&.0 Object "NX API" +.\" The -*- nroff -*- definitions below are for supplemental macros used +.\" in Tcl/Tk manual entries. +.\" +.\" .AP type name in/out ?indent? +.\" Start paragraph describing an argument to a library procedure. +.\" type is type of argument (int, etc.), in/out is either "in", "out", +.\" or "in/out" to describe whether procedure reads or modifies arg, +.\" and indent is equivalent to second arg of .IP (shouldn't ever be +.\" needed; use .AS below instead) +.\" +.\" .AS ?type? ?name? +.\" Give maximum sizes of arguments for setting tab stops. Type and +.\" name are examples of largest possible arguments that will be passed +.\" to .AP later. If args are omitted, default tab stops are used. +.\" +.\" .BS +.\" Start box enclosure. From here until next .BE, everything will be +.\" enclosed in one large box. +.\" +.\" .BE +.\" End of box enclosure. +.\" +.\" .CS +.\" Begin code excerpt. +.\" +.\" .CE +.\" End code excerpt. +.\" +.\" .VS ?version? ?br? +.\" Begin vertical sidebar, for use in marking newly-changed parts +.\" of man pages. The first argument is ignored and used for recording +.\" the version when the .VS was added, so that the sidebars can be +.\" found and removed when they reach a certain age. If another argument +.\" is present, then a line break is forced before starting the sidebar. +.\" +.\" .VE +.\" End of vertical sidebar. +.\" +.\" .DS +.\" Begin an indented unfilled display. +.\" +.\" .DE +.\" End of indented unfilled display. +.\" +.\" .SO ?manpage? +.\" Start of list of standard options for a Tk widget. The manpage +.\" argument defines where to look up the standard options; if +.\" omitted, defaults to "options". The options follow on successive +.\" lines, in three columns separated by tabs. +.\" +.\" .SE +.\" End of list of standard options for a Tk widget. +.\" +.\" .OP cmdName dbName dbClass +.\" Start of description of a specific option. cmdName gives the +.\" option's name as specified in the class command, dbName gives +.\" the option's name in the option database, and dbClass gives +.\" the option's class in the option database. +.\" +.\" .UL arg1 arg2 +.\" Print arg1 underlined, then print arg2 normally. +.\" +.\" .QW arg1 ?arg2? +.\" Print arg1 in quotes, then arg2 normally (for trailing punctuation). +.\" +.\" .PQ arg1 ?arg2? +.\" Print an open parenthesis, arg1 in quotes, then arg2 normally +.\" (for trailing punctuation) and then a closing parenthesis. +.\" +.\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages. .if t .wh -1.3i ^B .nr ^l \n(.l .ad b -'\" # Start an argument description +.\" # Start an argument description .de AP .ie !"\\$4"" .TP \\$4 .el \{\ @@ -78,7 +85,7 @@ .\} .ta \\n()Au \\n()Bu .ie !"\\$3"" \{\ -\&\\$1 \\fI\\$2\\fP (\\$3) +\&\\$1 \\fI\\$2\\fP (\\$3) .\".b .\} .el \{\ @@ -91,7 +98,7 @@ .\} .\} .. -'\" # define tabbing values for .AP +.\" # define tabbing values for .AP .de AS .nr )A 10n .if !"\\$1"" .nr )A \\w'\\$1'u+3n @@ -101,9 +108,9 @@ .nr )C \\n()Bu+\\w'(in/out)'u+2n .. .AS Tcl_Interp Tcl_CreateInterp in/out -'\" # BS - start boxed text -'\" # ^y = starting y location -'\" # ^b = 1 +.\" # BS - start boxed text +.\" # ^y = starting y location +.\" # ^b = 1 .de BS .br .mk ^y @@ -113,7 +120,7 @@ .if n \l'\\n(.lu\(ul' .if n .fi .. -'\" # BE - end boxed text (draw box now) +.\" # BE - end boxed text (draw box now) .de BE .nf .ti 0 @@ -133,16 +140,16 @@ .br .nr ^b 0 .. -'\" # VS - start vertical sidebar -'\" # ^Y = starting y location -'\" # ^v = 1 (for troff; for nroff this doesn't matter) +.\" # VS - start vertical sidebar +.\" # ^Y = starting y location +.\" # ^v = 1 (for troff; for nroff this doesn't matter) .de VS .if !"\\$2"" .br .mk ^Y .ie n 'mc \s12\(br\s0 .el .nr ^v 1u .. -'\" # VE - end of vertical sidebar +.\" # VE - end of vertical sidebar .de VE .ie n 'mc .el \{\ @@ -157,9 +164,9 @@ .\} .nr ^v 0 .. -'\" # Special macro to handle page bottom: finish off current -'\" # box/sidebar if in box/sidebar mode, then invoked standard -'\" # page bottom macro. +.\" # Special macro to handle page bottom: finish off current +.\" # box/sidebar if in box/sidebar mode, then invoked standard +.\" # page bottom macro. .de ^B .ev 2 'ti 0 @@ -186,34 +193,36 @@ .mk ^Y .\} .. -'\" # DS - begin display +.\" # DS - begin display .de DS .RS .nf .sp .. -'\" # DE - end display +.\" # DE - end display .de DE .fi .RE .sp .. -'\" # SO - start of list of standard options +.\" # SO - start of list of standard options .de SO +'ie '\\$1'' .ds So \\fBoptions\\fR +'el .ds So \\fB\\$1\\fR .SH "STANDARD OPTIONS" .LP .nf -.ta 4c 8c 12c +.ta 5.5c 11c .ft B .. -'\" # SE - end of list of standard options +.\" # SE - end of list of standard options .de SE .fi .ft R .LP -See the \\fBoptions\\fR manual entry for details on the standard options. +See the \\*(So manual entry for details on the standard options. .. -'\" # OP - start of full description for a single option +.\" # OP - start of full description for a single option .de OP .LP .nf @@ -222,22 +231,45 @@ Database Name: \\fB\\$2\\fR Database Class: \\fB\\$3\\fR .fi +.IP .. -'\" # CS - begin code excerpt +.\" # CS - begin code excerpt .de CS .RS .nf .ta .25i .5i .75i 1i .. -'\" # CE - end code excerpt +.\" # CE - end code excerpt .de CE .fi .RE .. +.\" # UL - underline word .de UL \\$1\l'|0\(ul'\\$2 .. -.TH "nx::Object" 3 2.0 Object "" +.\" # QW - apply quotation marks to word +.de QW +.ie '\\*(lq'"' ``\\$1''\\$2 +.\"" fix emacs highlighting +.el \\*(lq\\$1\\*(rq\\$2 +.. +.\" # PQ - apply parens and quotation marks to word +.de PQ +.ie '\\*(lq'"' (``\\$1''\\$2)\\$3 +.\"" fix emacs highlighting +.el (\\*(lq\\$1\\*(rq\\$2)\\$3 +.. +.\" # QR - quoted range +.de QR +.ie '\\*(lq'"' ``\\$1''\\-``\\$2''\\$3 +.\"" fix emacs highlighting +.el \\*(lq\\$1\\*(rq\\-\\*(lq\\$2\\*(rq\\$3 +.. +.\" # MT - "empty" string +.de MT +.QW "" +.. .BS .SH NAME nx::Object \- API reference of the base class in the NX object system @@ -246,11 +278,11 @@ .sp \fBnx::Object\fR \fBnew\fR ?\fB-object-mixins\fR \fImixinSpec\fR? ?\fB-class\fR \fInewClassName\fR? ?\fB-object-filters\fR \fIfilterSpec\fR? ?\fIinitBlock\fR? .sp -\fIobj\fR ?\fBpublic\fR | \fBprivate\fR | \fBprotected\fR? \fBobject alias\fR \fImethodName\fR ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-frame\fR \fBobject\fR | \fBmethod\fR? \fIcmdName\fR +\fIobj\fR ?\fBpublic\fR | \fBprivate\fR | \fBprotected\fR? \fBobject alias\fR ?\fB-debug\fR? ?\fB-deprecated\fR? \fImethodName\fR ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-frame\fR \fBobject\fR | \fBmethod\fR? \fIcmdName\fR .sp \fIobj\fR \fBcget\fR \fIconfigurationOption\fR .sp -\fIobj\fR \fBconfigure\fR ?\fIconfigurationOption\fR \fIvalue\fR ...? +\fIobj\fR \fBconfigure\fR ?\fIconfigurationOption\fR \fIvalue\fR \&.\&.\&.? .sp \fIobj\fR \fBcontains\fR ?-withnew \fItrueFalse\fR? ?-object \fIobjectName\fR? ?-class \fIclassName\fR? \fIcmds\fR .sp @@ -260,19 +292,21 @@ .sp \fIobj\fR \fBdestroy\fR .sp -\fIobj\fR \fBeval\fR \fIarg\fR ?\fIarg\fR ...? +\fIobj\fR \fBeval\fR \fIarg\fR ?\fIarg\fR \&.\&.\&.? .sp -\fIobj\fR \fBobject\fR \fBfilters\fR \fIsubmethod\fR ?\fIarg\fR ...? +\fIobj\fR \fBobject\fR \fBfilters\fR \fIsubmethod\fR ?\fIarg\fR \&.\&.\&.? .sp -\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject forward\fR \fImethodName\fR ?\fB-prefix\fR \fIprefixName\fR? ?\fB-frame\fR \fBobject\fR? ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-verbose\fR? ?\fItarget\fR? ?\fIarg\fR ...? +\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject forward\fR ?\fB-debug\fR? ?\fB-deprecated\fR? \fImethodName\fR ?\fB-prefix\fR \fIprefixName\fR? ?\fB-frame\fR \fBobject\fR? ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-verbose\fR? ?\fItarget\fR? ?\fIarg\fR \&.\&.\&.? .sp +\fIobj\fR \fBinfo baseclass\fR +.sp \fIobj\fR \fBinfo children\fR ?\fB-type\fR \fIclassName\fR? ?\fIpattern\fR? .sp \fIobj\fR \fBinfo class\fR .sp -\fIobj\fR \fBinfo has\fR ?\fBmixin\fR | \fBnamespace\fR | \fBtype\fR? ?\fIarg\fR ...? +\fIobj\fR \fBinfo has\fR ?\fBmixin\fR | \fBnamespace\fR | \fBtype\fR? ?\fIarg\fR \&.\&.\&.? .sp -\fIobj\fR \fBinfo lookup\fR \fIsubmethod\fR ?\fIarg\fR ...? +\fIobj\fR \fBinfo lookup\fR \fIsubmethod\fR ?\fIarg\fR \&.\&.\&.? .sp \fIobj\fR \fBinfo name\fR .sp @@ -298,175 +332,183 @@ .sp \fIobj\fR \fBinfo vars\fR ?\fIpattern\fR? .sp -\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject method\fR \fIname\fR \fIparameters\fR ?\fB-checkalways\fR? ?\fB-returns\fR \fIvalueChecker\fR? \fIbody\fR +\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject method\fR ?\fB-debug\fR? ?\fB-deprecated\fR? \fIname\fR \fIparameters\fR ?\fB-checkalways\fR? ?\fB-returns\fR \fIvalueChecker\fR? \fIbody\fR .sp \fIobj\fR \fBmove\fR \fInewObjectName\fR .sp -\fIobj\fR \fBobject mixins\fR \fIsubmethod\fR ?\fIarg\fR ...? +\fIobj\fR \fBobject mixins\fR \fIsubmethod\fR ?\fIarg\fR \&.\&.\&.? .sp \fIobj\fR \fBobject property\fR ?\fB-accessor\fR \fBpublic\fR | \fBprotected\fR | \fBprivate\fR? ?\fB-configurable\fR \fItrueFalse\fR? ?\fB-incremental\fR? ?\fB-class\fR \fIclassName\fR? ?\fB-nocomplain\fR? \fIspec\fR ?\fIinitBlock\fR? .sp \fIobj\fR \fBrequire namespace\fR .sp \fIobj\fR \fBrequire\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject method\fR \fImethodName\fR .sp -\fIobj\fR \fBunknown\fR \fIunknownMethodName\fR ?\fIarg\fR ...? +\fIobj\fR \fBunknown\fR \fIunknownMethodName\fR ?\fIarg\fR \&.\&.\&.? .sp \fIobj\fR \fBobject variable\fR ?\fB-accessor\fR \fBpublic\fR | \fBprotected\fR | \fBprivate\fR? ?\fB-incremental\fR? ?\fB-class\fR \fIclassName\fR? ?\fB-configurable\fR \fItrueFalse\fR? ?\fB-initblock\fR \fIscript\fR? ?\fB-nocomplain\fR? \fIspec\fR ?\fIdefaultValue\fR? .sp .BE .SH DESCRIPTION .PP -\fBnx::Object\fR is the base class of the NX object system. All +\fBnx::Object\fR is the base class of the NX object system\&. All objects defined in NX are (direct or indirect) instances of this -base class. The methods provided by the \fBnx::Object\fR +base class\&. The methods provided by the \fBnx::Object\fR base class are available to all objects and to all classes defined in -NX. +NX\&. .CS -+---------+ -| ::nx::* | -+---------+--------------------------------------Y -| | -| +---------+ instance of +----------+ | -| | |<....................| | | -| | Class | | Object | | -| | |....................>| | | -| +----+----+ subclass of +-----+----+ | -| ^ ^ ^ | -instance.|...........................|....|......./ -of | | | -+-----+-----+ subclass of | | instance -| |.....................| | of -| /cls/ | (by default) | -| | | -+-----------+ | -^ | -instance |.............(xor)..............| -of | +-----------+ | -|.........| |..........| -| /obj/ | -| | -+-----------+ + + + +---------+ + | ::nx::* | + +---------+--------------------------------------Y + | | + | +---------+ instance of +----------+ | + | | |<\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.| | | + | | Class | | Object | | + | | |\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.>| | | + | +----+----+ subclass of +-----+----+ | + | ^ ^ ^ | +instance\&.|\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.|\&.\&.\&.\&.|\&.\&.\&.\&.\&.\&.\&./ + of | | | + +-----+-----+ subclass of | | instance + | |\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.| | of + | /cls/ | (by default) | + | | | + +-----------+ | + ^ | +instance |\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.(xor)\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.| + of | +-----------+ | + |\&.\&.\&.\&.\&.\&.\&.\&.\&.| |\&.\&.\&.\&.\&.\&.\&.\&.\&.\&.| + | /obj/ | + | | + +-----------+ + .CE -NX allows for creating and for using objects (e.g. \fIobj\fR) which are +NX allows for creating and for using objects (e\&.g\&. \fIobj\fR) which are instantiated from the base class \fBnx::Object\fR -directly. Typical use cases are singletons and anonymous, inline -objects. In such use cases, NX does not require creating an -intermediate application class (e.g. \fIcls\fR), which specializes the base class -\fBnx::Object\fR by default, beforehand. +directly\&. Typical use cases are singletons and anonymous, inline +objects\&. In such use cases, NX does not require creating an +intermediate application class (e\&.g\&. \fIcls\fR), which specializes the base class +\fBnx::Object\fR by default, beforehand\&. .PP -Objects (e.g. \fIobj\fR) which are creating by instantiating a -previously defined application class (e.g. \fIcls\fR) are indirect -instances of \fBnx::Object\fR. +Objects (e\&.g\&. \fIobj\fR) which are creating by instantiating a +previously defined application class (e\&.g\&. \fIcls\fR) are indirect +instances of \fBnx::Object\fR\&. .PP Direct instances of \fBnx::Object\fR can be created as follows: .TP \fBnx::Object\fR \fBcreate\fR \fIobj\fR ?\fB-object-mixins\fR \fImixinSpec\fR? ?\fB-class\fR \fInewClassName\fR? ?\fB-object-filters\fR \fIfilterSpec\fR? ?\fIinitBlock\fR? .sp To create a direct instance of \fBnx::Object\fR having an explicit name -\fIobj\fR, use \fBcreate\fR on \fBnx::Object\fR. Note that +\fIobj\fR, use \fBcreate\fR on \fBnx::Object\fR\&. Note that \fBcreate\fR is defined by \fBnx::Class\fR and is available to \fBnx::Object\fR being -an instance of \fBnx::Class\fR. This way, singleton objects can be -created, for example. +an instance of \fBnx::Class\fR\&. This way, singleton objects can be +created, for example\&. .TP \fBnx::Object\fR \fBnew\fR ?\fB-object-mixins\fR \fImixinSpec\fR? ?\fB-class\fR \fInewClassName\fR? ?\fB-object-filters\fR \fIfilterSpec\fR? ?\fIinitBlock\fR? To create a direct instance of \fBnx::Object\fR having an -automatically assigned, implict object name, use \fBnew\fR on \fBnx::Object\fR. Note +automatically assigned, implict object name, use \fBnew\fR on \fBnx::Object\fR\&. Note that \fBnew\fR is defined by \fBnx::Class\fR and is available to -\fBnx::Object\fR being an instance of \fBnx::Class\fR. Using \fBnew\fR allows -for creating anonymous, inline objects, for example. +\fBnx::Object\fR being an instance of \fBnx::Class\fR\&. Using \fBnew\fR allows +for creating anonymous, inline objects, for example\&. .PP The configuration options for direct and indirect instances of \fBnx::Object\fR, which can be passed when calling \fBcreate\fR and \fBnew\fR, are -documented in the subsequent section. +documented in the subsequent section\&. .SH "CONFIGURATION OPTIONS FOR INSTANCES OF NX::OBJECT" .PP Configuration options can be used for configuring objects during their creation by passing the options as non-positional -arguments into calls of \fBnew\fR and \fBcreate\fR (see \fBnx::Class\fR). An +arguments into calls of \fBnew\fR and \fBcreate\fR (see \fBnx::Class\fR)\&. An existing object can be queried for its current configuration using -\fBcget\fR and it can be re-configured using \fBconfigure\fR. Legal +\fBcget\fR and it can be re-configured using \fBconfigure\fR\&. Legal configuration options are: .TP \fB-class\fR ?\fIclassName\fR? -Retrieves the current class of the object or sets the object's class to \fIclassName\fR, if provided. +Retrieves the current class of the object or sets the object's class to \fIclassName\fR, if provided\&. .TP \fB-object-filters\fR ?\fIfilterMethods\fR? Retrieves the list of currently active per-object filter methods or sets a list of per-object filter methods, if \fIfilterMethods\fR is -provided. +provided\&. .TP \fB-object-mixins\fR ?\fImixinSpecs\fR? If \fImixinSpecs\fR is not specified, retrieves the list of currently -active per-object mixin specifications. If \fImixinSpecs\fR is +active per-object mixin specifications\&. If \fImixinSpecs\fR is specified, sets a list of per-object mixin specifications to become -active. mixin classes are returned or set in terms of a list -of mixin specifications. +active\&. mixin classes are returned or set in terms of a list +of mixin specifications\&. .PP .SH "METHODS FOR INSTANCES OF NX::OBJECT" .TP \fBalias\fR .RS .TP -\fIobj\fR ?\fBpublic\fR | \fBprivate\fR | \fBprotected\fR? \fBobject alias\fR \fImethodName\fR ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-frame\fR \fBobject\fR | \fBmethod\fR? \fIcmdName\fR -Define an alias method for the given object. The +\fIobj\fR ?\fBpublic\fR | \fBprivate\fR | \fBprotected\fR? \fBobject alias\fR ?\fB-debug\fR? ?\fB-deprecated\fR? \fImethodName\fR ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-frame\fR \fBobject\fR | \fBmethod\fR? \fIcmdName\fR +Define an alias method for the given object\&. The resulting method registers a pre-existing Tcl command \fIcmdName\fR -under the (alias) name \fImethodName\fR with the object. If \fIcmdName\fR refers +under the (alias) name \fImethodName\fR with the object\&. If \fIcmdName\fR refers to another \fBmethod\fR, the corresponding argument -should be a valid method handle. If a Tcl command (e.g., a +should be a valid method handle\&. If a Tcl command (e\&.g\&., a \fBproc\fR), the argument should be a fully qualified Tcl command -name. If aliasing a subcommand (e.g., \fBarray exists\fR) of a Tcl namespace ensemble (e.g., \fBarray\fR), \fIcmdName\fR must hold the fully qualified subcommand name (and not the ensemble name of -the subcommand). +name\&. If aliasing a subcommand (e\&.g\&., \fBarray exists\fR) of a Tcl namespace ensemble (e\&.g\&., \fBarray\fR), \fIcmdName\fR must hold the fully qualified subcommand name (and not the ensemble name of the subcommand)\&. .sp As for a regular \fBobject method\fR, \fB-returns\fR allows for setting a value checker on the values returned by -the aliased command \fIcmdName\fR. +the aliased command \fIcmdName\fR\&. .sp When creating an alias method for -a \fIC-implemented\fR Tcl command (i.e., command defined using the +a \fIC-implemented\fR Tcl command (i\&.e\&., command defined using the Tcl/NX C-API), \fB-frame\fR sets the scope -for variable references used in the aliased command. If the provided +for variable references used in the aliased command\&. If the provided value is \fBobject\fR, then variable references will be resolved in the -context of the called object, i.e., the object upon which the alias method is -invoked, as if they were object variables. There is no need for using -the colon-prefix notation for identifying object variables. If the -value is \fBmethod\fR, then the aliased command will be executed as a regular method call. The command is aware of its called-object context; i.e., it can resolve \fB::nx::self\fR. In addition, the alias method has access to the method-call context (e.g., \fBnx::next\fR). If \fB-frame\fR is omitted, and by default, the variable references will resolve in the context of the caller of the alias method. +context of the called object, i\&.e\&., the object upon which the alias method is invoked, as if they were object variables\&. There is no need for using +the colon-prefix notation for identifying object variables\&. If the +value is \fBmethod\fR, then the aliased command will be executed as a regular method call\&. The command is aware of its called-object context; i\&.e\&., it can resolve \fB::nx::self\fR\&. In addition, the alias method has access to the method-call context (e\&.g\&., \fBnx::next\fR)\&. If \fB-frame\fR is omitted, and by default, the variable references will resolve in the context of the caller of the alias method\&. +.sp +To express deprecation of the alias method \fImethodName\fR, set the \fB-deprecated\fR flag\&. Deprecated methods remain usable from client code, but their usage will be signaled to the developer and/or can be tracked using \fB::nsf::deprecated\fR\&. To register \fImethodName\fR with the debugger, set the \fB-debug\fR flag\&. Entering and exiting a method flagged for debugging can be recorded using \fB::nsf::log\fR\&. .RE .TP \fBcget\fR .RS .TP \fIobj\fR \fBcget\fR \fIconfigurationOption\fR The method is used to obtain the current value of \fIconfigurationOption\fR for -\fIobj\fR. The configuration options +\fIobj\fR\&. The configuration options available for querying through \fBcget\fR are determined by the -configurable properties defined by the class hierarchy of \fIobj\fR. The +configurable properties defined by the class hierarchy of \fIobj\fR\&. The queriable configuration options for \fIobj\fR can be -obtained by calling \fBinfo configure\fR. The \fIconfigurationOption\fR can -be set and modified using \fBconfigure\fR. +obtained by calling \fBinfo configure\fR\&. The \fIconfigurationOption\fR can +be set and modified using \fBconfigure\fR\&. .CS + + % nx::Object create obj ::obj % ::obj info configure -?-object-mixins /mixinreg .../? ?-class /class/? ?-object-filters /filterreg .../? ?/__initblock/? +?-object-mixins /mixinreg \&.\&.\&./? ?-class /class/? ?-object-filters /filterreg \&.\&.\&./? ?/__initblock/? % ::obj cget -class ::nx::Object + .CE .RE .TP \fBconfigure\fR .RS .TP -\fIobj\fR \fBconfigure\fR ?\fIconfigurationOption\fR \fIvalue\fR ...? -This method sets configuration options on an object. The configuration +\fIobj\fR \fBconfigure\fR ?\fIconfigurationOption\fR \fIvalue\fR \&.\&.\&.? +This method sets configuration options on an object\&. The configuration options available for setting on \fIobj\fR are determined by the -configurable properties defined by the class hierarchy of \fIobj\fR. The +configurable properties defined by the class hierarchy of \fIobj\fR\&. The settable configuration options for \fIobj\fR can be -obtained by calling \fBinfo configure\fR. Furthermore, \fBconfigure\fR is -also called during object construction. Under object construction, it receives -the arguments passed into calls of \fBcreate\fR and \fBnew\fR. Options -set using \fBconfigure\fR can be retrieved using \fBcget\fR. +obtained by calling \fBinfo configure\fR\&. Furthermore, \fBconfigure\fR is +also called during object construction\&. Under object construction, it receives +the arguments passed into calls of \fBcreate\fR and \fBnew\fR\&. Options +set using \fBconfigure\fR can be retrieved using \fBcget\fR\&. .CS + + % nx::Class create Foo {:property x} ::Foo % Foo create f1 -x 101 @@ -476,67 +518,71 @@ % f1 configure -x 200 % f1 cget -x 200 + .CE .RE .TP \fBcontains\fR .RS .TP \fIobj\fR \fBcontains\fR ?-withnew \fItrueFalse\fR? ?-object \fIobjectName\fR? ?-class \fIclassName\fR? \fIcmds\fR -This method acts as a builder for nested object structures. Object +This method acts as a builder for nested object structures\&. Object and class construction statements passed to this method as its last argument \fIcmds\fR are evaluated in a way so that the receiver object \fIobj\fR becomes the parent of the newly constructed objects and -classes. This is realized by setting explicitly the namespace for -constructing relatively named objects. Fully qualified object names in -\fIcmds\fR evade the nesting. +classes\&. This is realized by setting explicitly the namespace for +constructing relatively named objects\&. Fully qualified object names in +\fIcmds\fR evade the nesting\&. .sp \fB-withnew\fR requests the automatic rescoping of objects created using \fBnew\fR so that they become nested into the receiver object \fIobj\fR, rather than being created in the default -namespace for autonamed objects (i.e., ::nsf). If turned off, -autonamed objects do not become children of \fIobj\fR. +namespace for autonamed objects (i\&.e\&., ::nsf)\&. If turned off, +autonamed objects do not become children of \fIobj\fR\&. .sp The parent object \fIobjectName\fR to be used instead of \fIobj\fR can be specified -using \fB-object\fR. If this explicitly set parent +using \fB-object\fR\&. If this explicitly set parent object does not exist prior to calling \fBcontains\fR, it will be -created on the fly as a direct instance of \fBnx::Object\fR. Alternatively, +created on the fly as a direct instance of \fBnx::Object\fR\&. Alternatively, using \fB-class\fR, a class \fIclassName\fR other than \fBnx::Object\fR for the on-the-fly creation of \fIobjectName\fR -can be provided. +can be provided\&. .CS + + % nx::Class create Window { -:contains { -# -# Become children of Window, implicitly -# -nx::Class create Header; # Window::Header -nx::Object create Panel; # Window::Panel + :contains { + # + # Become children of Window, implicitly + # + nx::Class create Header; # Window::Header + nx::Object create Panel; # Window::Panel + } + # + # Explicitly declared a child of Window using [self] + # + nx::Class create [self]::Slider; # Window::Slider + # + # Fully-qualified objects do not become nested + # + nx::Class create ::Door; # ::Door } -# -# Explicitly declared a child of Window using [self] -# -nx::Class create [self]::Slider; # Window::Slider -# -# Fully-qualified objects do not become nested -# -nx::Class create ::Door; # ::Door -} ::Window % ::Window info children ::Window::Panel ::Window::Header ::Window::Slider + .CE .RE .TP \fBcopy\fR .RS .TP \fIobj\fR \fBcopy\fR \fInewObjectName\fR -Creates a full and deep copy of a source object \fIobj\fR. The +Creates a full and deep copy of a source object \fIobj\fR\&. The object's copy \fInewObjectName\fR features all structural and behavioral properties of the source object, including object variables, per-object methods, nested objects, slot objects, -namespaces, filters, mixins, and traces. +namespaces, filters, mixins, and traces\&. .RE .TP \fBdelete\fR @@ -554,9 +600,9 @@ \fIobj\fR \fBdelete object method\fR \fImethodName\fR Removes a property \fIpropertyName\fR, variable \fIvariableName\fR, and method \fImethodName\fR, respectively, previously defined for the -scope of the object. +scope of the object\&. .sp -\fBdelete object method\fR can be equally used for removing regular methods (see \fBobject method\fR), an alias method (see \fBobject alias\fR), and a forwarder method (see \fBobject forward\fR). +\fBdelete object method\fR can be equally used for removing regular methods (see \fBobject method\fR), an alias method (see \fBobject alias\fR), and a forwarder method (see \fBobject forward\fR)\&. .RE .TP \fBdestroy\fR @@ -565,412 +611,446 @@ \fIobj\fR \fBdestroy\fR This method allows for explicitly destructing an object \fIobj\fR, potentially prior to \fIobj\fR being destroyed by the object system -(e.g. during the shutdown of the object system upon calling \fBexit\fR): +(e\&.g\&. during the shutdown of the object system upon calling \fBexit\fR): .CS + [nx::Object new] destroy .CE .IP By providing a custom implementation of \fBdestroy\fR, the -destruction procedure of \fIobj\fR can be customized. Typically, once +destruction procedure of \fIobj\fR can be customized\&. Typically, once the application-specific destruction logic has completed, a custom \fBdestroy\fR will trigger the actual, physical object destruction -via \fBnext\fR. +via \fBnext\fR\&. .CS + + % [nx::Object create obj { -:public method destroy {} { -puts "destroying [self]" -next; # physical destruction -} + :public method destroy {} { + puts "destroying [self]" + next; # physical destruction + } }] destroy destroying ::obj + .CE .IP A customized object-desctruction scheme can be made shared between the instances of a class, by defining the custom \fBdestroy\fR for an application class: .CS + + % nx::Class create Foo { -:method destroy {} { -puts "destroying [self]" -next; # physical destruction + :method destroy {} { + puts "destroying [self]" + next; # physical destruction + } } -} ::Foo % Foo create f1 ::f1 % f1 destroy destroying ::f1 + .CE .IP Physical destruction is performed by clearing the in-memory object -storage of \fIobj\fR. This is achieved by passing \fIobj\fR into a -call to \fBdealloc\fR provided by \fBnx::Class\fR. A near, scripted +storage of \fIobj\fR\&. This is achieved by passing \fIobj\fR into a +call to \fBdealloc\fR provided by \fBnx::Class\fR\&. A near, scripted equivalent to the C-implemented \fBdestroy\fR provided by \fBnx::Object\fR would look as follows: .CS + + % Object method destroy {} { -[:info class] dealloc [self] + [:info class] dealloc [self] } + .CE .IP Note, however, that \fBdestroy\fR is protected against -application-level redefinition. Trying to evaluate the above script snippet yields: +application-level redefinition\&. Trying to evaluate the above script snippet yields: .CS -refuse to overwrite protected method 'destroy'; derive e.g. a sub-class! + + +refuse to overwrite protected method 'destroy'; derive e\&.g\&. a sub-class! + .CE .IP A custom \fBdestroy\fR must be provided as a refinement in a -subclass of \fBnx::Object\fR or in a mixin class. +subclass of \fBnx::Object\fR or in a mixin class\&. .RE .TP \fBeval\fR .RS .TP -\fIobj\fR \fBeval\fR \fIarg\fR ?\fIarg\fR ...? +\fIobj\fR \fBeval\fR \fIarg\fR ?\fIarg\fR \&.\&.\&.? Evaluates a special Tcl script for the scope of \fIobj\fR in the style -of Tcl's \fBeval\fR. There are, however, notable differences to the +of Tcl's \fBeval\fR\&. There are, however, notable differences to the standard \fBeval\fR: In this script, the colon-prefix notation is available to -dispatch to methods and to access variables of \fIobj\fR. Script-local +dispatch to methods and to access variables of \fIobj\fR\&. Script-local variables, which are thrown away once the evaluation of the script has -completed, can be defined to store intermediate results. +completed, can be defined to store intermediate results\&. .CS -% nx::Object create obj { -:object property {bar 1} -:public object method foo {x} { return $x } -} -::obj -% ::obj eval { -set y [:foo ${:bar}] -} -1 + + + % nx::Object create obj { + :object property {bar 1} + :public object method foo {x} { return $x } + } + ::obj + % ::obj eval { + set y [:foo ${:bar}] + } + 1 + .CE .RE .TP \fBfilters\fR .RS .TP -\fIobj\fR \fBobject\fR \fBfilters\fR \fIsubmethod\fR ?\fIarg\fR ...? +\fIobj\fR \fBobject\fR \fBfilters\fR \fIsubmethod\fR ?\fIarg\fR \&.\&.\&.? Accesses and modifies the list of methods which are registered as filters with \fIobj\fR using a specific setter or getter \fIsubmethod\fR: .RS .TP \fIobj\fR \fBobject\fR \fBfilters add\fR \fIspec\fR ?\fIindex\fR? -Inserts a single filter into the current list of filters of \fIobj\fR. Using \fIindex\fR, a position in the existing list of filters for inserting the new filter can be set. If -omitted, \fIindex\fR defaults to the list head (0). +Inserts a single filter into the current list of filters of \fIobj\fR\&. Using \fIindex\fR, a position in the existing list of filters for inserting the new filter can be set\&. If +omitted, \fIindex\fR defaults to the list head (0)\&. .TP \fIobj\fR \fBobject\fR \fBfilters clear\fR -Removes all filters from \fIobj\fR and returns the list of removed filters. Clearing +Removes all filters from \fIobj\fR and returns the list of removed filters\&. Clearing is equivalent to passing an empty list for \fIfilterSpecList\fR to -\fBobject\fR \fBfilter set\fR. +\fBobject\fR \fBfilter set\fR\&. .TP \fIobj\fR \fBobject\fR \fBfilters delete\fR ?\fB-nocomplain\fR? \fIspecPattern\fR Removes a single filter from the current list of filters of -\fIobj\fR whose spec matches \fIspecPattern\fR. \fIspecPattern\fR can -contain special matching chars (see \fBstring match\fR). \fBobject\fR \fBfilters delete\fR will +\fIobj\fR whose spec matches \fIspecPattern\fR\&. \fIspecPattern\fR can +contain special matching chars (see \fBstring match\fR)\&. \fBobject\fR \fBfilters delete\fR will throw an error if there is no matching filter, unless -\fB-nocomplain\fR is set. +\fB-nocomplain\fR is set\&. .TP \fIobj\fR \fBobject\fR \fBfilters get\fR -Returns the list of current filter specifications registered for \fIobj\fR. +Returns the list of current filter specifications registered for \fIobj\fR\&. .TP \fIobj\fR \fBobject\fR \fBfilters guard\fR \fImethodName\fR ?\fIexpr\fR? -If \fIexpr\fR is specified, registers a guard expression \fIexpr\fR with a filter \fImethodName\fR. This requires that the filter \fImethodName\fR has been previously set using \fBobject\fR \fBfilters set\fR or added using -\fBobject\fR \fBfilters add\fR. \fIexpr\fR must be a valid Tcl expression (see -\fBexpr\fR). An empty string for \fIexpr\fR will clear the currently registered -guard expression for filter \fImethodName\fR. +If \fIexpr\fR is specified, registers a guard expression \fIexpr\fR with a filter \fImethodName\fR\&. This requires that the filter \fImethodName\fR has been previously set using \fBobject\fR \fBfilters set\fR or added using +\fBobject\fR \fBfilters add\fR\&. \fIexpr\fR must be a valid Tcl expression (see +\fBexpr\fR)\&. An empty string for \fIexpr\fR will clear the currently registered +guard expression for filter \fImethodName\fR\&. .sp If \fIexpr\fR is omitted, returns the guard expression set on the -filter \fImethodName\fR defined for \fIobj\fR. If none -is available, an empty string will be returned. +filter \fImethodName\fR defined for \fIobj\fR\&. If none +is available, an empty string will be returned\&. .TP \fIobj\fR \fBobject\fR \fBfilters methods\fR ?\fIpattern\fR? If \fIpattern\fR is omitted, returns all filter names which are -defined by \fIobj\fR. By specifying \fIpattern\fR, the returned +defined by \fIobj\fR\&. By specifying \fIpattern\fR, the returned filters can be limited to those whose names match \fIpatterns\fR (see -\fBstring match\fR). +\fBstring match\fR)\&. .TP \fIobj\fR \fBobject\fR \fBfilters set\fR \fIfilterSpecList\fR \fIfilterSpecList\fR takes a list of filter specs, with each spec being itself either a -one-element or a two-element list: \fImethodName\fR ?-guard \fIguardExpr\fR?. \fImethodName\fR identifies +one-element or a two-element list: \fImethodName\fR ?-guard \fIguardExpr\fR?\&. \fImethodName\fR identifies an existing method of \fIobj\fR which becomes -registered as a filter. If having three elements, the third +registered as a filter\&. If having three elements, the third element \fIguardExpr\fR will be stored as a guard expression of the -filter. This guard expression must be a valid Tcl expression -(see \fBexpr\fR). \fIexpr\fR is evaluated when \fIobj\fR receives a message to determine whether the -filter should intercept the message. Guard expressions +filter\&. This guard expression must be a valid Tcl expression +(see \fBexpr\fR)\&. \fIexpr\fR is evaluated when \fIobj\fR receives a message to determine whether the +filter should intercept the message\&. Guard expressions allow for realizing context-dependent or conditional filter -composition. +composition\&. .RE .IP Every \fImethodName\fR in a \fIspec\fR must resolve to an existing method in -the scope of the object. To +the scope of the object\&. To access and to manipulate the list of filters of \fIobj\fR, -\fBcget\fR|\fBconfigure\fR \fB-object-filters\fR can also be used. +\fBcget\fR|\fBconfigure\fR \fB-object-filters\fR can also be used\&. .RE .TP \fBforward\fR .RS .TP -\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject forward\fR \fImethodName\fR ?\fB-prefix\fR \fIprefixName\fR? ?\fB-frame\fR \fBobject\fR? ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-verbose\fR? ?\fItarget\fR? ?\fIarg\fR ...? -Define a forward method for the given object. The +\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject forward\fR ?\fB-debug\fR? ?\fB-deprecated\fR? \fImethodName\fR ?\fB-prefix\fR \fIprefixName\fR? ?\fB-frame\fR \fBobject\fR? ?\fB-returns\fR \fIvalueChecker\fR? ?\fB-verbose\fR? ?\fItarget\fR? ?\fIarg\fR \&.\&.\&.? +Define a forward method for the given object\&. The definition of a forward method registers a predefined, but -changeable list of forwarder arguments under the (forwarder) name \fImethodName\fR. Upon +changeable list of forwarder arguments under the (forwarder) name \fImethodName\fR\&. Upon calling the forward method, the forwarder -arguments are evaluated as a Tcl command call. That is, if present, \fItarget\fR -is interpreted as a Tcl command (e.g., a Tcl \fBproc\fR or an object) +arguments are evaluated as a Tcl command call\&. That is, if present, \fItarget\fR +is interpreted as a Tcl command (e\&.g\&., a Tcl \fBproc\fR or an object) and the remainder of the forwarder arguments \fIarg\fR as arguments passed into -this command. The actual method arguments to the invocation of the +this command\&. The actual method arguments to the invocation of the forward method itself are appended to the list of forwarder -arguments. +arguments\&. If \fItarget\fR is omitted, the value of \fImethodName\fR is -implicitly set and used as \fItarget\fR. This way, when providing a +implicitly set and used as \fItarget\fR\&. This way, when providing a fully-qualified Tcl command name as \fImethodName\fR without \fItarget\fR, the unqualified \fImethodName\fR (\fBnamespace tail\fR) is used as the -forwarder name; while the fully-qualified one serves as the \fItarget\fR. +forwarder name; while the fully-qualified one serves as the \fItarget\fR\&. .sp As for a regular \fBobject method\fR, \fB-returns\fR allows for setting a value checker on the values returned by the -resulting Tcl command call. When passing \fBobject\fR to \fB-frame\fR, the +resulting Tcl command call\&. When passing \fBobject\fR to \fB-frame\fR, the resulting Tcl command is evaluated in the context of the object -receiving the forward method call. This way, variable names +receiving the forward method call\&. This way, variable names used in the resulting execution of a command become resolved as -object variables. +object variables\&. .sp +To express deprecation of the forward method \fImethodName\fR, set the \fB-deprecated\fR flag\&. Deprecated methods remain usable from client code, but their usage will be signaled to the developer and/or can be tracked using \fB::nsf::deprecated\fR\&. To register \fImethodName\fR with the debugger, set the \fB-debug\fR flag\&. Entering and exiting a method flagged for debugging can be recorded using \fB::nsf::log\fR\&. +.sp The list of forwarder arguments \fIarg\fR can contain as its elements -a mix of literal values and placeholders. Placeholders are prefixed +a mix of literal values and placeholders\&. Placeholders are prefixed with a percent symbol (%) and substituted for concrete values upon -calling the forward method. These placeholders allow for +calling the forward method\&. These placeholders allow for constructing and for manipulating the arguments to be passed into the resulting command call on the fly: .RS .IP \(bu -\fB%method\fR becomes substituted for the name of the forward method, i.e. \fImethodName\fR. +\fB%method\fR becomes substituted for the name of the forward method, i\&.e\&. \fImethodName\fR\&. .IP \(bu -\fB%self\fR becomes substituted for the name of the object receiving the call of the forward method. +\fB%self\fR becomes substituted for the name of the object receiving the call of the forward method\&. .IP \(bu -\fB%1\fR becomes substituted for the first method argument passed to the call of forward method. This requires, in turn, that \fIat least\fR one argument is passed along with the method call. +\fB%1\fR becomes substituted for the first method argument passed to the call of forward method\&. This requires, in turn, that \fIat least\fR one argument is passed along with the method call\&. .sp -Alternatively, \fB%1\fR accepts an optional argument \fIdefaults\fR: {\fB%1\fR \fIdefaults\fR}. -\fIdefaults\fR must be a valid Tcl list of two elements. For the first +Alternatively, \fB%1\fR accepts an optional argument \fIdefaults\fR: {\fB%1\fR \fIdefaults\fR}\&. +\fIdefaults\fR must be a valid Tcl list of two elements\&. For the first element, \fB%1\fR is substituted when there is no first method -argument which can be consumed by \fB%1\fR. The second element is +argument which can be consumed by \fB%1\fR\&. The second element is inserted upon availability of a first method argument with the consumed argument being appended right after the second list -element. This placeholder is typically used to define a pair of -getter/setter methods. +element\&. This placeholder is typically used to define a pair of +getter/setter methods\&. .IP \(bu {\fB%@\fR\fIindex\fR \fIvalue\fR} becomes substituted for the specified \fIvalue\fR at position \fIindex\fR in the forwarder-arguments list, with \fIindex\fR being either a positive integer, a negative integer, or the literal value \fBend\fR (such as -in Tcl's \fBlindex\fR). Positive integers specify a list position +in Tcl's \fBlindex\fR)\&. Positive integers specify a list position relative to the list head, negative integers give a position relative -to the list tail. Indexes for positioning placeholders in the definition of a +to the list tail\&. Indexes for positioning placeholders in the definition of a forward method are evaluated from left to right and should be -used in ascending order. +used in ascending order\&. .sp Note that \fIvalue\fR can be a literal or any of the placeholders -(e.g., \fB%method\fR, \fB%self\fR). Position prefixes are -exempted, they are evaluated as \fB%\fR\fIcmdName\fR-placeholders in this context. +(e\&.g\&., \fB%method\fR, \fB%self\fR)\&. Position prefixes are +exempted, they are evaluated as \fB%\fR\fIcmdName\fR-placeholders in this context\&. .IP \(bu {\fB%argclindex\fR \fIlist\fR} becomes substituted for the \fIn\fRth element of the provided \fIlist\fR , with \fIn\fR -corresponding to the number of method arguments passed to the forward method call. +corresponding to the number of method arguments passed to the forward method call\&. .IP \(bu -\fB%%\fR is substituted for a single, literal percent symbol (%). +\fB%%\fR is substituted for a single, literal percent symbol (%)\&. .IP \(bu \fB%\fR\fIcmdName\fR is substituted for the value returned -from executing the Tcl command \fIcmdName\fR. To pass arguments to \fIcmdName\fR, the placeholder should be wrapped into a Tcl \fBlist\fR: {\fB%\fR\fIcmdName\fR ?\fIarg\fR ...?}. +from executing the Tcl command \fIcmdName\fR\&. To pass arguments to \fIcmdName\fR, the placeholder should be wrapped into a Tcl \fBlist\fR: {\fB%\fR\fIcmdName\fR ?\fIarg\fR \&.\&.\&.?}\&. .sp Consider using fully-qualified Tcl command names for \fIcmdName\fR to -avoid possible name conflicts with the predefined placeholders, e.g., -\fB%self\fR vs. %\fB::nx::self\fR. +avoid possible name conflicts with the predefined placeholders, e\&.g\&., +\fB%self\fR vs\&. %\fB::nx::self\fR\&. .RE .sp To disambiguate the names of subcommands or methods, which potentially become called by a forward method, a prefix \fIprefixName\fR -can be set using \fB-prefix\fR. This prefix is prepended -automatically to the argument following \fItarget\fR (i.e., a second -argument), if present. If missing, \fB-prefix\fR has no -effect on the forward method call. +can be set using \fB-prefix\fR\&. This prefix is prepended +automatically to the argument following \fItarget\fR (i\&.e\&., a second +argument), if present\&. If missing, \fB-prefix\fR has no +effect on the forward method call\&. .sp To inspect and to debug the conversions performed by the above placeholders, setting the switch \fB-verbose\fR -will have the command list to be executed (i.e., after substitution) +will have the command list to be executed (i\&.e\&., after substitution) printed using \fB::nsf::log\fR (debugging level: \fBnotice\fR) upon -calling the forward method. +calling the forward method\&. .RE .TP \fBinfo\fR .RS .TP +\fIobj\fR \fBinfo baseclass\fR +Returns the base class of \fIobj\fR\&. The base class +is the class from which all NX objects are instantiated +directly or indirectly (typically \fBnx::Object\fR)\&. +.TP \fIobj\fR \fBinfo children\fR ?\fB-type\fR \fIclassName\fR? ?\fIpattern\fR? -Retrieves the list of nested (or aggregated) objects of \fIobj\fR. The +Retrieves the list of nested (or aggregated) objects of \fIobj\fR\&. The resulting list contains the fully qualified names of the nested -objects. If \fB-type\fR is set, only nested objects which are +objects\&. If \fB-type\fR is set, only nested objects which are direct or indirect instances of class \fIclassName\fR are -returned. Using \fIpattern\fR, only nested objects whose names match -\fIpattern\fR are returned. The \fIpattern\fR string can contain -special matching characters (see \fBstring match\fR). This method -allows for introspecting on \fBcontains\fR. +returned\&. Using \fIpattern\fR, only nested objects whose names match +\fIpattern\fR are returned\&. The \fIpattern\fR string can contain +special matching characters (see \fBstring match\fR)\&. This method +allows for introspecting on \fBcontains\fR\&. .TP \fIobj\fR \fBinfo class\fR Returns the fully qualified name of the current \fBnx::Class\fR of -\fIobj\fR. In case of re-classification (see \fBconfigure\fR), the +\fIobj\fR\&. In case of re-classification (see \fBconfigure\fR), the returned class will be different from the \fBnx::Class\fR from which \fIobj\fR was -originally instantiated using \fBcreate\fR or \fBnew\fR. +originally instantiated using \fBcreate\fR or \fBnew\fR\&. .TP -\fIobj\fR \fBinfo has\fR ?\fBmixin\fR | \fBnamespace\fR | \fBtype\fR? ?\fIarg\fR ...? +\fIobj\fR \fBinfo has\fR ?\fBmixin\fR | \fBnamespace\fR | \fBtype\fR? ?\fIarg\fR \&.\&.\&.? .RS .TP -\fIobj\fR \fBinfo method has mixin\fR \fIclassName\fR -Verifies whether \fIobj\fR has a given \fBnx::Class\fR \fIclassName\fR registered as a mixin class (returns: \fBtrue\fR) or not (returns: \fBfalse\fR). +\fIobj\fR \fBinfo has mixin\fR \fIclassName\fR +Verifies whether \fIobj\fR has a given \fBnx::Class\fR \fIclassName\fR registered as a mixin class (returns: \fBtrue\fR) or not (returns: \fBfalse\fR)\&. .TP \fIobj\fR \fBinfo has namespace\fR Checks whether the object has a companion Tcl namespace (returns: -\fBtrue\fR) or not (returns: \fBfalse\fR). The namespace could -have been created using, for example, \fBobject require namespace\fR. +\fBtrue\fR) or not (returns: \fBfalse\fR)\&. The namespace could +have been created using, for example, \fBobject require namespace\fR\&. .TP \fIobj\fR \fBinfo has type\fR \fIclassName\fR Tests whether the \fBnx::Class\fR \fIclassName\fR is a type of the -object (returns: \fBtrue\fR) or not (returns: \fBfalse\fR). That +object (returns: \fBtrue\fR) or not (returns: \fBfalse\fR)\&. That is, the method checks whether the object is a direct instance of \fIclassName\fR or -an indirect instance of one of the superclasses of \fIclassName\fR. +an indirect instance of one of the superclasses of \fIclassName\fR\&. .RE .TP -\fIobj\fR \fBinfo lookup\fR \fIsubmethod\fR ?\fIarg\fR ...? -A collection of submethods to retrieve structural features (e.g. +\fIobj\fR \fBinfo lookup\fR \fIsubmethod\fR ?\fIarg\fR \&.\&.\&.? +A collection of submethods to retrieve structural features (e\&.g\&. configuration options, slot objects) and behavioral -features (e.g. methods, filters) available for \fIobj\fR from the perspective of a client to \fIobj\fR. Features provided by \fIobj\fR itself and by the classes in its current linearisation list are considered. +features (e\&.g\&. methods, filters) available for \fIobj\fR from the perspective of a client to \fIobj\fR\&. Features provided by \fIobj\fR itself and by the classes in its current linearisation list are considered\&. .RS .TP \fIobj\fR \fBinfo lookup configure parameters\fR ?\fInamePattern\fR? Returns all configuration options available for \fIobj\fR as a list of -method-parameter definitions. They can be used, for example, to -define a custom method refinement for \fBconfigure\fR. The returned +method-parameter definitions\&. They can be used, for example, to +define a custom method refinement for \fBconfigure\fR\&. The returned configuration options can be limited to those whose names match \fIpattern\fR -(see \fBstring match\fR). +(see \fBstring match\fR)\&. .TP \fIobj\fR \fBinfo lookup configure syntax\fR Returns all configuration options available for \fIobj\fR as a concrete-syntax description to be used in human-understandable -messages (e.g. errors or warnings, documentation strings). +messages (e\&.g\&. errors or warnings, documentation strings)\&. .TP \fIobj\fR \fBinfo lookup filter\fR \fIname\fR Returns the method handle for the filter method \fIname\fR, if -currently registered. If there is no filter \fIname\fR registered, an -empty string is returned. +currently registered\&. If there is no filter \fIname\fR registered, an +empty string is returned\&. .TP \fIobj\fR \fBinfo lookup filters\fR ?\fB-guards\fR? ?\fInamePattern\fR? -Returns the method handles of all filters which are active on \fIobj\fR. By +Returns the method handles of all filters which are active on \fIobj\fR\&. By turning on the switch \fB-guards\fR, the corresponding guard -expressions, if any, are also reported for each filter as a three-element list: \fImethodHandle\fR -guard \fIguardExpr\fR. The returned filters can be limited to -those whose names match \fInamePattern\fR (see \fBstring match\fR). +expressions, if any, are also reported for each filter as a three-element list: \fImethodHandle\fR -guard \fIguardExpr\fR\&. The returned filters can be limited to +those whose names match \fInamePattern\fR (see \fBstring match\fR)\&. .TP \fIobj\fR \fBinfo lookup method\fR \fIname\fR Returns the method handle for a method \fIname\fR if a -so-named method can be invoked on \fIobj\fR. If there is no method -\fIname\fR, an empty string is returned. +so-named method can be invoked on \fIobj\fR\&. If there is no method +\fIname\fR, an empty string is returned\&. .TP \fIobj\fR \fBinfo lookup methods\fR ?\fInamePattern\fR? Returns the names of all methods (including aliases and forwarders) -which can be invoked on \fIobj\fR. The returned methods can be limited -to those whose names match \fInamePattern\fR (see \fBstring match\fR). +which can be invoked on \fIobj\fR\&. The returned methods can be limited +to those whose names match \fInamePattern\fR (see \fBstring match\fR)\&. .TP \fIobj\fR \fBinfo lookup mixins\fR ?\fB-guards\fR? ?\fInamePattern\fR? Returns the object names of all mixin classes which are -currently active on \fIobj\fR. By turning on the switch \fB-guards\fR, the corresponding guard expressions, if any, are also reported as a +currently active on \fIobj\fR\&. By turning on the switch \fB-guards\fR, the corresponding guard expressions, if any, are also reported as a three-element list for each mixin class: \fIclassName\fR --guard \fIguardExpr\fR. The returned mixin classes can be -limited to those whose names match \fInamePattern\fR (see \fBstring match\fR). +-guard \fIguardExpr\fR\&. The returned mixin classes can be +limited to those whose names match \fInamePattern\fR (see \fBstring match\fR)\&. .TP \fIobj\fR \fBinfo lookup slots\fR ?\fB-type\fR \fIclassName\fR? ?\fB-source\fR all | application | system? ?\fInamePattern\fR? Returns the command names of all slot objects responsible for -managing properties, variables, and relations of \fIobj\fR. The +managing properties, variables, and relations of \fIobj\fR\&. The returned slot objects can be limited according to any or a combination of the following criteria: First, slot objects can be filtered based on their command names matching \fInamePattern\fR (see \fBstring -match\fR). Second, \fB-type\fR allows one to select -slot objects which are instantiated from a subclass \fIclassName\fR of \fBnx::Slot\fR (default: \fBnx::Slot\fR) . Third, \fB-source\fR restricts slot objects returned according to their provenance in either the NX \fIsystem\fR classes or the \fIapplication\fR classes present in the linearisation list of \fIobj\fR (default: \fIall\fR). +match\fR)\&. Second, \fB-type\fR allows one to select +slot objects which are instantiated from a subclass \fIclassName\fR of \fBnx::Slot\fR (default: \fBnx::Slot\fR) \&. Third, \fB-source\fR restricts slot objects returned according to their provenance in either the NX \fIsystem\fR classes or the \fIapplication\fR classes present in the linearisation list of \fIobj\fR (default: \fIall\fR)\&. .sp To extract details of each slot object, use the \fBinfo\fR -submethods available for each slot object. +submethods available for each slot object\&. .TP \fIobj\fR \fBinfo lookup variables\fR Returns the command names of all slot objects responsible for -managing properties and variables of \fIobj\fR, if provided by \fIobj\fR or the classes in the linearisation list of \fIobj\fR. +managing properties and variables of \fIobj\fR, if provided by \fIobj\fR or the classes in the linearisation list of \fIobj\fR\&. .sp -This is equivalent to calling: \fIobj\fR \fBinfo lookup slots\fR -type ::nx::VariableSlot -source all ?\fInamePattern\fR?. +This is equivalent to calling: \fIobj\fR \fBinfo lookup slots\fR -type ::nx::VariableSlot -source all ?\fInamePattern\fR?\&. .sp To extract details of each slot object, use the \fBinfo\fR -submethods available for each slot object. +submethods available for each slot object\&. .RE .TP \fIobj\fR \fBinfo name\fR -Returns the unqualified name of an object, i.e., the object name -without any namespace qualifiers. +Returns the unqualified name of an object, i\&.e\&., the object name +without any namespace qualifiers\&. .TP \fIobj\fR \fBinfo info\fR ?\fB-asList\fR? Returns the available submethods of the \fBinfo\fR method ensemble for \fIobj\fR, either as a pretty-printed string or as a Tcl list (if the switch \fB-asList\fR is set) for further -processing. +processing\&. .TP \fIobj\fR \fBinfo object filters\fR ?\fB-guards\fR? ?\fIpattern\fR? If \fIpattern\fR is omitted, returns all filter names which are -defined by \fIobj\fR. By turning on the switch \fB-guards\fR, the +defined by \fIobj\fR\&. By turning on the switch \fB-guards\fR, the corresponding guard expressions, if any, are also reported along with each filter as a three-element list: \fIfilterName\fR -guard -\fIguardExpr\fR. By specifying \fIpattern\fR, the +\fIguardExpr\fR\&. By specifying \fIpattern\fR, the returned filters can be limited to those whose names match \fIpatterns\fR (see -\fBstring match\fR). +\fBstring match\fR)\&. .TP \fIobj\fR \fBinfo object method\fR \fIoption\fR \fImethodName\fR This introspection submethod provides access to the details -of \fImethodName\fR provided by \fIobj\fR. Permitted values for -\fIoption\fR are: +of \fImethodName\fR provided by \fIobj\fR\&. If \fImethodName\fR +is not the name of an existing method, an empty string is returned\&. To +disambiguate between a non-existing method and an empty string as +valid return value (e\&.g\&., for \fBinfo object method args|parameters|args|\&.\&.\&.\fR), +use \fBinfo object method exists\fR\&. +.sp +Permitted values for \fIoption\fR are: .RS .IP \(bu \fBargs\fR returns a list containing the parameter names of -\fImethodName\fR, in order of the method-parameter specification. +\fImethodName\fR, in order of the method-parameter specification\&. .IP \(bu -\fBbody\fR returns the body script of \fImethodName\fR. +\fBbody\fR returns the body script of \fImethodName\fR\&. .IP \(bu -\fBdefinition\fR returns a canonical command list which allows for (re-)define \fImethodName\fR. +\fBcallprotection\fR returns the call-protection level set for \fImethodName\fR; possible values: \fBpublic\fR, \fBprotected\fR, \fBprivate\fR\&. .IP \(bu -\fBdefinitionhandle\fR returns the method handle for a submethod in a method ensemble from the perspective of \fIobj\fR as method provider. \fImethodName\fR must contain a complete method path. +\fBdebug\fR returns 1 if \fImethodName\fR is in debug mode, 0 otherwise\&. .IP \(bu -\fBexists\fR returns 1 if there is a \fImethodName\fR provided by \fIobj\fR, returns 0 otherwise. +\fBdefinition\fR returns a canonical command list which allows for (re-)define \fImethodName\fR\&. .IP \(bu -\fBhandle\fR returns the method handle for \fImethodName\fR. +\fBdefinitionhandle\fR returns the method handle for a submethod in a method ensemble from the perspective of \fIobj\fR as method provider\&. \fImethodName\fR must contain a complete method path\&. .IP \(bu -\fBorigin\fR returns the aliased command if \fImethodName\fR is an alias method, or an empty string otherwise. +\fBdeprecated\fR returns 1 if \fImethodName\fR is deprecated, 0 otherwise\&. .IP \(bu +\fBexists\fR returns 1 if there is a \fImethodName\fR provided by \fIobj\fR, returns 0 otherwise\&. +.IP \(bu +\fBhandle\fR returns the method handle for \fImethodName\fR\&. +.IP \(bu +\fBorigin\fR returns the aliased command if \fImethodName\fR is an alias method, or an empty string otherwise\&. +.IP \(bu \fBparameters\fR returns the parameter specification of \fImethodName\fR as -a list of parameter names and type specifications. +a list of parameter names and type specifications\&. .IP \(bu -\fBregistrationhandle\fR returns the method handle for a submethod in a method ensemble from the perspective of the method caller. \fImethodName\fR must contain a complete method path. +\fBregistrationhandle\fR returns the method handle for a submethod in a method ensemble from the perspective of the method caller\&. \fImethodName\fR must contain a complete method path\&. .IP \(bu \fBreturns\fR gives the type specification defined -for the return value of \fImethodName\fR. +for the return value of \fImethodName\fR\&. .IP \(bu -\fBsubmethods\fR returns the names of all submethods of \fImethodName\fR, if \fImethodName\fR is a method ensemble. Otherwise, an empty string is returned. +\fBsubmethods\fR returns the names of all submethods of \fImethodName\fR, if \fImethodName\fR is a method ensemble\&. Otherwise, an empty string is returned\&. .IP \(bu \fBsyntax\fR returns the method parameters of \fImethodName\fR as a concrete-syntax description to be used in human-understandable -messages (e.g., errors or warnings, documentation strings). +messages (e\&.g\&., errors or warnings, documentation strings)\&. .IP \(bu -\fBtype\fR returns whether \fImethodName\fR is a \fIscripted\fR method, an \fIalias\fR method, a \fIforwarder\fR method, or a \fIsetter\fR method. +\fBtype\fR returns whether \fImethodName\fR is a \fIscripted\fR method, an \fIalias\fR method, a \fIforwarder\fR method, or a \fIsetter\fR method\&. .RE .TP \fIobj\fR \fBinfo object methods\fR ?\fB-callprotection\fR \fIlevel\fR? ?\fB-type\fR \fImethodType\fR? ?\fB-path\fR? ?\fInamePattern\fR? -Returns the names of all methods defined by \fIobj\fR. Methods +Returns the names of all methods defined by \fIobj\fR\&. Methods covered include those defined using \fBobject alias\fR -and \fBobject forward\fR. The returned methods can be limited -to those whose names match \fInamePattern\fR (see \fBstring match\fR). +and \fBobject forward\fR\&. The returned methods can be limited +to those whose names match \fInamePattern\fR (see \fBstring match\fR)\&. .sp -By setting \fB-callprotection\fR, only methods of a certain call protection \fIlevel\fR (\fBpublic\fR, \fBprotected\fR, or \fBprivate\fR) will be returned. Methods of a specific type can be requested using \fB-type\fR. The recognized values for \fImethodType\fR are: +By setting \fB-callprotection\fR, only methods of a certain call protection \fIlevel\fR (\fBpublic\fR, \fBprotected\fR, or \fBprivate\fR) will be returned\&. Methods of a specific type can be requested using \fB-type\fR\&. The recognized values for \fImethodType\fR are: .RS .IP \(bu \fBscripted\fR denotes methods defined using \fBobject\fR \fBmethod\fR; @@ -986,453 +1066,482 @@ .TP \fIobj\fR \fBinfo object mixins\fR ?\fB-guards\fR? ?\fIpattern\fR? If \fIpattern\fR is omitted, returns the object names of the mixin classes which -extend \fIobj\fR directly. By turning on the switch \fB-guards\fR, +extend \fIobj\fR directly\&. By turning on the switch \fB-guards\fR, the corresponding guard expressions, if any, are also reported along with each mixin as a three-element list: \fIclassName\fR --guard \fIguardExpr\fR. The returned mixin classes can be limited to those whose names -match \fIpatterns\fR (see \fBstring match\fR). +-guard \fIguardExpr\fR\&. The returned mixin classes can be limited to those whose names +match \fIpatterns\fR (see \fBstring match\fR)\&. .TP \fIobj\fR \fBinfo object slots\fR ?\fB-type\fR \fIclassName\fR? ?\fIpattern\fR? -If \fIpattern\fR is not specified, returns the object names of all slot objects defined by \fIobj\fR. The returned slot objects can be limited according to any or a +If \fIpattern\fR is not specified, returns the object names of all slot objects defined by \fIobj\fR\&. The returned slot objects can be limited according to any or a combination of the following criteria: First, slot objects can be filtered based on their command names matching \fIpattern\fR (see \fBstring -match\fR). Second, \fB-type\fR allows one to select -slot objects which are instantiated from a subclass \fIclassName\fR of \fBnx::Slot\fR (default: \fBnx::Slot\fR). +match\fR)\&. Second, \fB-type\fR allows one to select +slot objects which are instantiated from a subclass \fIclassName\fR of \fBnx::Slot\fR (default: \fBnx::Slot\fR)\&. .TP \fIobj\fR \fBinfo object variables\fR ?\fIpattern\fR? If \fIpattern\fR is omitted, returns the object names of all slot objects provided -by \fIobj\fR which are responsible for managing properties and variables of \fIobj\fR. Otherwise, +by \fIobj\fR which are responsible for managing properties and variables of \fIobj\fR\&. Otherwise, only slot objects whose names match \fIpattern\fR are -returned. +returned\&. .sp -This is equivalent to calling: \fIobj\fR \fBinfo object slots\fR \fB-type\fR \fB::nx::VariableSlot\fR \fIpattern\fR. +This is equivalent to calling: \fIobj\fR \fBinfo object slots\fR \fB-type\fR \fB::nx::VariableSlot\fR \fIpattern\fR\&. .sp To extract details of each slot object, use the \fBinfo\fR -submethods available for each slot object. +submethods available for each slot object\&. .TP \fIobj\fR \fBinfo parent\fR Returns the fully qualified name of the parent object of \fIobj\fR, if -any. If there is no parent object, the name of the Tcl -namespace containing \fIobj\fR (e.g. "::") will be reported. +any\&. If there is no parent object, the name of the Tcl +namespace containing \fIobj\fR (e\&.g\&. "::") will be reported\&. .TP \fIobj\fR \fBinfo precedence\fR ?\fB-intrinsic\fR? ?\fIpattern\fR? -Lists the classes from which \fIobj\fR inherits structural (e.g. -properties) and behavioral features (e.g. methods) and methods, in -order of the linearisation scheme in NX. By setting the +Lists the classes from which \fIobj\fR inherits structural (e\&.g\&. +properties) and behavioral features (e\&.g\&. methods) and methods, in +order of the linearisation scheme in NX\&. By setting the switch \fB-intrinsic\fR, only classes which participate in -superclass/subclass relationships (i.e., intrinsic classes) are -returned. If a \fIpattern\fR is provided only classes whose -names match \fIpattern\fR are returned. The \fIpattern\fR string can -contain special matching characters (see \fBstring match\fR). +superclass/subclass relationships (i\&.e\&., intrinsic classes) are +returned\&. If a \fIpattern\fR is provided only classes whose +names match \fIpattern\fR are returned\&. The \fIpattern\fR string can +contain special matching characters (see \fBstring match\fR)\&. .TP \fIobj\fR \fBinfo variable\fR \fIoption\fR \fIhandle\fR Retrieves selected details about a variable represented by the given -\fIhandle\fR. A \fIhandle\fR can be obtained by querying \fIobj\fR using -\fBinfo object variables\fR and \fBinfo lookup variables\fR. +\fIhandle\fR\&. A \fIhandle\fR can be obtained by querying \fIobj\fR using +\fBinfo object variables\fR and \fBinfo lookup variables\fR\&. Valid values for \fIoption\fR are: .RS .IP \(bu -\fBname\fR returns the variable name. +\fBname\fR returns the variable name\&. .IP \(bu \fBparameter\fR returns a canonical parameter specification -eligible to (re-)define the given variable (e.g. using \fBobject variable\fR) in a new context. +eligible to (re-)define the given variable (e\&.g\&. using \fBobject variable\fR) in a new context\&. .IP \(bu -\fBdefinition\fR returns a canonical representation of the definition command used to create the variable in its current configuration. +\fBdefinition\fR returns a canonical representation of the definition command used to create the variable in its current configuration\&. .RE .TP \fIobj\fR \fBinfo vars\fR ?\fIpattern\fR? Yields a list of Tcl variable names created and defined for the scope of -\fIobj\fR, i.e., object variables. The list can be limited to object variables whose names -match \fIpattern\fR. The \fIpattern\fR string can contain special -matching characters (see \fBstring match\fR). +\fIobj\fR, i\&.e\&., object variables\&. The list can be limited to object variables whose names +match \fIpattern\fR\&. The \fIpattern\fR string can contain special +matching characters (see \fBstring match\fR)\&. .RE .TP \fBmethod\fR .RS .TP -\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject method\fR \fIname\fR \fIparameters\fR ?\fB-checkalways\fR? ?\fB-returns\fR \fIvalueChecker\fR? \fIbody\fR -Defines a scripted method \fImethodName\fR for the scope of the object. The -method becomes part of the object's signature interface. Besides +\fIobj\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject method\fR ?\fB-debug\fR? ?\fB-deprecated\fR? \fIname\fR \fIparameters\fR ?\fB-checkalways\fR? ?\fB-returns\fR \fIvalueChecker\fR? \fIbody\fR +Defines a scripted method \fImethodName\fR for the scope of the object\&. The +method becomes part of the object's signature interface\&. Besides a \fImethodName\fR, the method definition specifies -the method \fIparameters\fR and a method \fIbody\fR. +the method \fIparameters\fR and a method \fIbody\fR\&. .sp \fIparameters\fR accepts a Tcl \fBlist\fR containing an arbitrary -number of non-positional and positional parameter definitions. Each parameter +number of non-positional and positional parameter definitions\&. Each parameter definition comprises a parameter name, a parameter-specific value checker, and -parameter options. +parameter options\&. .sp -The \fIbody\fR contains the method implementation as a script block. In this body script, the -colon-prefix notation is available to denote an object variable and -a self call. In addition, the context of the object receiving the -method call (i.e., the message) can be accessed (e.g., using \fBnx::self\fR) and -the call stack can be introspected (e.g., using \fBnx::current\fR). +The \fIbody\fR contains the method implementation as a script +block\&. In this body script, the colon-prefix notation is available to +denote an object variable and a self call\&. In addition, the +context of the object receiving the method call (i\&.e\&., the message) +can be accessed (e\&.g\&., using \fBnx::self\fR) and the call stack can be +introspected (e\&.g\&., using \fBnx::current\fR)\&. .sp Optionally, \fB-returns\fR allows for setting a value checker on -values returned by the method implementation. By setting +values returned by the method implementation\&. By setting the switch \fB-checkalways\fR, value checking on arguments and return value is guaranteed to be performed, even if -value checking is temporarily disabled; see \fBnx::configure\fR). +value checking is temporarily disabled; see \fBnx::configure\fR)\&. .sp +To express deprecation of the method \fIname\fR, set the \fB-deprecated\fR flag\&. Deprecated methods remain usable from client code, but their usage will be signaled to the developer and/or can be tracked using \fB::nsf::deprecated\fR\&. To register \fIname\fR with the debugger, set the \fB-debug\fR flag\&. Entering and exiting a method flagged for debugging can be recorded using \fB::nsf::log\fR\&. +.sp A method closely resembles a Tcl \fBproc\fR, but it differs in some important aspects: First, a method can define non-positional -parameters and value checkers on arguments. Second, the script +parameters and value checkers on arguments\&. Second, the script implementing the method body can contain object-specific notation and -commands (see above). Third, method calls \fIcannot\fR be intercepted -using Tcl \fBtrace\fR. Note that an existing Tcl \fBproc\fR can be registered as -an alias method with the object (see \fBobject alias\fR). +commands (see above)\&. Third, method calls \fIcannot\fR be intercepted +using Tcl \fBtrace\fR\&. Note that an existing Tcl \fBproc\fR can be +registered as an alias method with the object (see +\fBobject alias\fR)\&. .RE .TP \fBmove\fR .RS .TP \fIobj\fR \fBmove\fR \fInewObjectName\fR -Effectively renames an object. First, the source object \fIobj\fR is -cloned into a target object \fInewObjectName\fR using \fBcopy\fR. Second, -the source object \fIobj\fR is destroyed by invoking \fBdestroy\fR. +Effectively renames an object\&. First, the source object \fIobj\fR is +cloned into a target object \fInewObjectName\fR using \fBcopy\fR\&. Second, +the source object \fIobj\fR is destroyed by invoking \fBdestroy\fR\&. \fBmove\fR is also called internally when \fBrename\fR is -performed for a Tcl command representing an object. +performed for a Tcl command representing an object\&. .RE .TP \fBmixins\fR .RS .TP -\fIobj\fR \fBobject mixins\fR \fIsubmethod\fR ?\fIarg\fR ...? +\fIobj\fR \fBobject mixins\fR \fIsubmethod\fR ?\fIarg\fR \&.\&.\&.? Accesses and modifies the list of mixin classes of \fIobj\fR using a specific setter or getter \fIsubmethod\fR: .RS .TP \fIobj\fR \fBobject\fR \fBmixins add\fR \fIspec\fR ?\fIindex\fR? -Inserts a single mixin class into the current list of mixin classes of \fIobj\fR. Using \fIindex\fR, a position in the existing list of mixin classes for inserting the new mixin class can be set. If -omitted, \fIindex\fR defaults to the list head (0). +Inserts a single mixin class into the current list of mixin classes of \fIobj\fR\&. Using \fIindex\fR, a position in the existing list of mixin classes for inserting the new mixin class can be set\&. If +omitted, \fIindex\fR defaults to the list head (0)\&. .TP \fIobj\fR \fBobject\fR \fBmixins classes\fR ?\fIpattern\fR? If \fIpattern\fR is omitted, returns the object names of the mixin classes which -extend \fIobj\fR directly. By specifying \fIpattern\fR, the returned mixin classes can -be limited to those whose names match \fIpattern\fR (see \fBstring match\fR). +extend \fIobj\fR directly\&. By specifying \fIpattern\fR, the returned mixin classes can +be limited to those whose names match \fIpattern\fR (see \fBstring match\fR)\&. .TP \fIobj\fR \fBobject\fR \fBmixins clear\fR -Removes all mixin classes from \fIobj\fR and returns the list of removed mixin classes. Clearing is equivalent to passing an empty list for \fImixinSpecList\fR to -\fBobject\fR \fBmixins set\fR. +Removes all mixin classes from \fIobj\fR and returns the list of removed mixin classes\&. Clearing is equivalent to passing an empty list for \fImixinSpecList\fR to +\fBobject\fR \fBmixins set\fR\&. .TP \fIobj\fR \fBobject\fR \fBmixins delete\fR ?\fB-nocomplain\fR? \fIspecPattern\fR -Removes a mixin class from a current list of mixin classes of \fIobj\fR whose spec matches \fIspecPattern\fR. \fIspecPattern\fR can contain special matching chars (see \fBstring match\fR). \fBobject\fR \fBmixins delete\fR will throw an error if there is no matching mixin class, unless \fB-nocomplain\fR is set. +Removes a mixin class from a current list of mixin classes of \fIobj\fR whose spec matches \fIspecPattern\fR\&. \fIspecPattern\fR can contain special matching chars (see \fBstring match\fR)\&. \fBobject\fR \fBmixins delete\fR will throw an error if there is no matching mixin class, unless \fB-nocomplain\fR is set\&. .TP \fIobj\fR \fBobject\fR \fBmixins get\fR -Returns the list of current mixin specifications. +Returns the list of current mixin specifications\&. .TP \fIobj\fR \fBobject\fR \fBmixins guard\fR \fIclassName\fR ?\fIexpr\fR? -If \fIexpr\fR is specified, a guard expression \fIexpr\fR is registered with the mixin class \fIclassName\fR. This requires that the corresponding mixin class \fIclassName\fR has been previously set using \fBobject\fR \fBmixins set\fR or added using \fBobject\fR \fBmixins add\fR. \fIexpr\fR must be a valid Tcl expression (see -\fBexpr\fR). An empty string for \fIexpr\fR will clear the currently registered -guard expression for the mixin class \fIclassName\fR. +If \fIexpr\fR is specified, a guard expression \fIexpr\fR is registered with the mixin class \fIclassName\fR\&. This requires that the corresponding mixin class \fIclassName\fR has been previously set using \fBobject\fR \fBmixins set\fR or added using \fBobject\fR \fBmixins add\fR\&. \fIexpr\fR must be a valid Tcl expression (see +\fBexpr\fR)\&. An empty string for \fIexpr\fR will clear the currently registered +guard expression for the mixin class \fIclassName\fR\&. .sp If \fIexpr\fR is not specified, returns the active guard -expression. If none is available, an empty string will be returned. +expression\&. If none is available, an empty string will be returned\&. .TP \fIobj\fR \fBobject\fR \fBmixins set\fR \fImixinSpecList\fR -\fImixinSpecList\fR represents a list of mixin class specs, with each spec being itself either a one-element or a three-element list: \fIclassName\fR ?-guard \fIguardExpr\fR?. If +\fImixinSpecList\fR represents a list of mixin class specs, with each spec being itself either a one-element or a three-element list: \fIclassName\fR ?-guard \fIguardExpr\fR?\&. If having one element, the element will be considered the \fIclassName\fR -of the mixin class. If having three elements, the third +of the mixin class\&. If having three elements, the third element \fIguardExpr\fR will be stored as a guard expression of the -mixin class. This guard expression will be evaluated using +mixin class\&. This guard expression will be evaluated using \fBexpr\fR when \fIobj\fR receives a message to determine if the mixin -is to be considered during method dispatch or not. Guard expressions +is to be considered during method dispatch or not\&. Guard expressions allow for realizing context-dependent or conditional mixin -composition. +composition\&. .RE .IP At the time of setting the mixin relation, that is, calling \fBobject\fR \fBmixins\fR, every -\fIclassName\fR as part of a spec must be an existing instance of \fBnx::Class\fR. To +\fIclassName\fR as part of a spec must be an existing instance of \fBnx::Class\fR\&. To access and to manipulate the list of mixin classes of \fIobj\fR, -\fBcget\fR|\fBconfigure\fR \fB-object-mixins\fR can also be used. +\fBcget\fR|\fBconfigure\fR \fB-object-mixins\fR can also be used\&. .RE .TP \fB__object_configureparameter\fR .RS .TP \fIobj\fR \fB__object_configureparameter\fR -Computes and returns the configuration options available for \fIobj\fR, to be consumed as method-parameter specification by \fBconfigure\fR. +Computes and returns the configuration options available for \fIobj\fR, to be consumed as method-parameter specification by \fBconfigure\fR\&. .RE .TP \fBproperty\fR .RS .TP \fIobj\fR \fBobject property\fR ?\fB-accessor\fR \fBpublic\fR | \fBprotected\fR | \fBprivate\fR? ?\fB-configurable\fR \fItrueFalse\fR? ?\fB-incremental\fR? ?\fB-class\fR \fIclassName\fR? ?\fB-nocomplain\fR? \fIspec\fR ?\fIinitBlock\fR? -Defines a property for the scope of the object. The \fIspec\fR provides +Defines a property for the scope of the object\&. The \fIspec\fR provides the property specification as a \fBlist\fR holding at least one element or, maximum, two elements: -\fIpropertyName\fR?\fB:\fR\fItypeSpec\fR? ?\fIdefaultValue\fR?. The \fIpropertyName\fR is also used as to form the names of the getter/setter methods, -if requested (see \fB-accessor\fR). It +\fIpropertyName\fR?\fB:\fR\fItypeSpec\fR? ?\fIdefaultValue\fR?\&. The \fIpropertyName\fR is also used as to form the names of the getter/setter methods, +if requested (see \fB-accessor\fR)\&. It is, optionally, equipped with a \fItypeSpec\fR following a colon delimiter which specifies a value checker for the values -which become assigned to the property. The second, optional element -sets a \fIdefaultValue\fR for this property. +which become assigned to the property\&. The second, optional element +sets a \fIdefaultValue\fR for this property\&. .sp If \fB-accessor\fR is set, a property will provide for a pair of getter and setter methods: .RS .TP \fIobj\fR \fIpropertyName\fR \fBset\fR \fIvalue\fR -Sets the property \fIpropertyName\fR to \fIvalue\fR. +Sets the property \fIpropertyName\fR to \fIvalue\fR\&. .TP \fIobj\fR \fIpropertyName\fR \fBget\fR -Returns the current value of property \fIpropertyName\fR. +Returns the current value of property \fIpropertyName\fR\&. .TP \fIobj\fR \fIpropertyName\fR \fBunset\fR -Removes the value store of \fIpropertyName\fR (e.g., an object variable), if existing. +Removes the value store of \fIpropertyName\fR (e\&.g\&., an object variable), if existing\&. .RE .IP The option value passed along \fB-accessor\fR sets the level of call protection for the generated getter and setter methods: \fBpublic\fR, -\fBprotected\fR, or \fBprivate\fR. By default, no getter and setter -methods are created. +\fBprotected\fR, or \fBprivate\fR\&. By default, no getter and setter +methods are created\&. .sp Turning on the switch \fB-incremental\fR provides a refined -setter interface to the value managed by the property. First, +setter interface to the value managed by the property\&. First, setting \fB-incremental\fR implies requesting \fB-accessor\fR (set to \fBpublic\fR by default, if not specified -explicitly). Second, the managed value will be considered a valid Tcl -list. A multiplicity of \fB1..*\fR is set by default, if not -specified explicitly as part of \fIspec\fR. Third, to +explicitly)\&. Second, the managed value will be considered a valid Tcl +list\&. A multiplicity of \fB1\&.\&.*\fR is set by default, if not +specified explicitly as part of \fIspec\fR\&. Third, to manage this list value element-wise (\fIincrementally\fR), two additional setter methods become available: .RS .TP \fIobj\fR \fIpropertyName\fR \fBadd\fR \fIelement\fR ?\fIindex\fR? -Adding \fIelement\fR to the managed list value, at the list position given by \fIindex\fR (by default: 0). +Adding \fIelement\fR to the managed list value, at the list position given by \fIindex\fR (by default: 0)\&. .TP \fIobj\fR \fIpropertyName\fR \fBdelete\fR \fIelementPattern\fR -Removing one or multiple elements from the managed list value which match \fIelementPattern\fR. \fIelementPattern\fR can contain matching characters (see \fBstring match\fR). +Removing one or multiple elements from the managed list value which match \fIelementPattern\fR\&. \fIelementPattern\fR can contain matching characters (see \fBstring match\fR)\&. .RE .sp By setting \fB-configurable\fR to \fBtrue\fR (the default), the property can be accessed and modified through \fBcget\fR and -\fBconfigure\fR, respectively. If \fBfalse\fR, no configuration option -will become available via \fBcget\fR and \fBconfigure\fR. +\fBconfigure\fR, respectively\&. If \fBfalse\fR, no configuration option +will become available via \fBcget\fR and \fBconfigure\fR\&. .sp If neither \fB-accessor\fR nor \fB-configurable\fR are requested, the value managed by the property will have to be accessed -and modified directly. If the property manages an object variable, its -value will be readable and writable using \fBset\fR and \fBeval\fR. +and modified directly\&. If the property manages an object variable, its +value will be readable and writable using \fBset\fR and \fBeval\fR\&. .sp A property becomes implemented by a slot object under any of the following conditions: .RS .IP \(bu -\fB-configurable\fR equals \fBtrue\fR (by default). +\fB-configurable\fR equals \fBtrue\fR (by default)\&. .IP \(bu -\fB-accessor\fR is one of \fBpublic\fR, \fBprotected\fR, or \fBprivate\fR. +\fB-accessor\fR is one of \fBpublic\fR, \fBprotected\fR, or \fBprivate\fR\&. .IP \(bu -\fB-incremental\fR is turned on. +\fB-incremental\fR is turned on\&. .IP \(bu -\fIinitBlock\fR is a non-empty string. +\fIinitBlock\fR is a non-empty string\&. .RE .IP Assuming default settings, every property is realized by a -slot object. +slot object\&. .sp Provided a slot object managing the property is to be created, a custom class \fIclassName\fR from which this slot object is -to be instantiated can be set using \fB-class\fR. The -default value is \fB::nx::VariableSlot\fR. +to be instantiated can be set using \fB-class\fR\&. The +default value is \fB::nx::VariableSlot\fR\&. .sp The last argument \fIinitBlock\fR accepts an optional Tcl script which is passed into -the initialization procedure (see \fBconfigure\fR) of the property's slot object. See -also \fB\fIinitBlock\fR for \fBcreate\fR and \fBnew\fR\fR. +the initialization procedure (see \fBconfigure\fR) of the property's slot object\&. See +also \fB\fIinitBlock\fR for \fBcreate\fR and \fBnew\fR\fR\&. .sp By default, the property will ascertain that no (potentially) pre-existing and equally named object variable will be overwritten -when defining the property. In case of a conflict, an error exception +when defining the property\&. In case of a conflict, an error exception is thrown: .CS + + % Object create obj { set :x 1 } ::obj % ::obj object property {x 2} object ::obj has already an instance variable named 'x' + .CE .IP If the switch \fB-nocomplain\fR is on, this check is omitted (continuing the above example): .CS + + % ::obj object property -nocomplain {x 2} % ::obj eval {set :x} 2 + .CE .RE .TP \fBrequire\fR .RS .TP \fIobj\fR \fBrequire namespace\fR -Create a Tcl namespace named after the object \fIobj\fR. All object -variables become available as namespace variables. +Create a Tcl namespace named after the object \fIobj\fR\&. All object +variables become available as namespace variables\&. .TP \fIobj\fR \fBrequire\fR ?\fBpublic\fR | \fBprotected\fR | \fBprivate\fR? \fBobject method\fR \fImethodName\fR Attempts to register a method definition made available using \fB::nsf::method::provide\fR under -the name \fImethodName\fR with \fIobj\fR . The registered +the name \fImethodName\fR with \fIobj\fR \&. The registered method is subjected to default call protection (\fBprotected\fR), if -not set explicitly. +not set explicitly\&. .RE .TP \fBunknown\fR .RS .TP -\fIobj\fR \fBunknown\fR \fIunknownMethodName\fR ?\fIarg\fR ...? -This method is called implicitly whenever an unknown method is invoked. +\fIobj\fR \fBunknown\fR \fIunknownMethodName\fR ?\fIarg\fR \&.\&.\&.? +This method is called implicitly whenever an unknown method is invoked\&. \fIunknownMethodName\fR indicates the unresolvable method name, followed by the remainder of the original argument vector as a number -of \fIarg\fR of the indirected method invocation. +of \fIarg\fR of the indirected method invocation\&. .RE .TP \fBvariable\fR .RS .TP \fIobj\fR \fBobject variable\fR ?\fB-accessor\fR \fBpublic\fR | \fBprotected\fR | \fBprivate\fR? ?\fB-incremental\fR? ?\fB-class\fR \fIclassName\fR? ?\fB-configurable\fR \fItrueFalse\fR? ?\fB-initblock\fR \fIscript\fR? ?\fB-nocomplain\fR? \fIspec\fR ?\fIdefaultValue\fR? -Defines a variable for the scope of the object. The \fIspec\fR provides -the variable specification: \fIvariableName\fR?\fB:\fR\fItypeSpec\fR?. The +Defines a variable for the scope of the object\&. The \fIspec\fR provides +the variable specification: \fIvariableName\fR?\fB:\fR\fItypeSpec\fR?\&. The \fIvariableName\fR will be used to name the underlying Tcl variable -and the getter/setter methods, if requested (see \fB-accessor\fR). +and the getter/setter methods, if requested (see \fB-accessor\fR)\&. \fIspec\fR is optionally equipped with a \fItypeSpec\fR following a colon delimiter which specifies a value checker for the values -managed by the variable. Optionally, a \fIdefaultValue\fR can -be defined. +managed by the variable\&. Optionally, a \fIdefaultValue\fR can +be defined\&. .sp If \fB-accessor\fR is set explicitly, a variable will provide for a pair of getter and setter methods: .RS .TP \fIobj\fR \fIvariableName\fR \fBset\fR \fIvarValue\fR -Sets \fIvariableName\fR to \fIvarValue\fR. +Sets \fIvariableName\fR to \fIvarValue\fR\&. .TP \fIobj\fR \fIvariableName\fR \fBget\fR -Returns the current value of \fIvariableName\fR. +Returns the current value of \fIvariableName\fR\&. .TP \fIobj\fR \fIvariableName\fR \fBunset\fR -Removes \fIvariableName\fR, if existing, underlying the property. +Removes \fIvariableName\fR, if existing, underlying the property\&. .RE .IP The option value passed along \fB-accessor\fR sets the level of call protection for the getter and setter methods: \fBpublic\fR, -\fBprotected\fR, or \fBprivate\fR. By default, no getter and setter -methods are created. +\fBprotected\fR, or \fBprivate\fR\&. By default, no getter and setter +methods are created\&. .sp Turning on the switch \fB-incremental\fR provides a refined -setter interface to the value managed by the variable. First, +setter interface to the value managed by the variable\&. First, setting \fB-incremental\fR implies requesting \fB-accessor\fR (\fBpublic\fR by default, if not specified -explicitly). Second, the managed value will be considered a valid Tcl -list. A multiplicity of \fB1..*\fR is set by default, if not -specified explicitly as part of \fIspec\fR (see above). Third, to +explicitly)\&. Second, the managed value will be considered a valid Tcl +list\&. A multiplicity of \fB1\&.\&.*\fR is set by default, if not +specified explicitly as part of \fIspec\fR (see above)\&. Third, to manage this list value element-wise (\fIincrementally\fR), two additional setter operations become available: .RS .TP \fIobj\fR \fIvariableName\fR \fBadd\fR \fIelement\fR ?\fIindex\fR? -Adding \fIelement\fR to the managed list value, at the list position given by \fIindex\fR (by default: 0). +Adding \fIelement\fR to the managed list value, at the list position given by \fIindex\fR (by default: 0)\&. .TP \fIobj\fR \fIvariableName\fR \fBdelete\fR \fIelementPattern\fR Removing one or multiple elements from the managed list value which -match \fIelementPattern\fR. \fIelementPattern\fR can contain matching -characters (see \fBstring match\fR). +match \fIelementPattern\fR\&. \fIelementPattern\fR can contain matching +characters (see \fBstring match\fR)\&. .RE .sp By setting \fB-configurable\fR to \fBtrue\fR, the variable can be accessed and modified via \fBcget\fR and \fBconfigure\fR, -respectively. If \fBfalse\fR (the default), the interface based on \fBcget\fR and -\fBconfigure\fR will not become available. In this case, and provided that +respectively\&. If \fBfalse\fR (the default), the interface based on \fBcget\fR and +\fBconfigure\fR will not become available\&. In this case, and provided that \fB-accessor\fR is set, the variable can be accessed and modified via -the getter/setter methods. Alternatively, the underlying Tcl variable, which +the getter/setter methods\&. Alternatively, the underlying Tcl variable, which is represented by the variable, can always be accessed and modified -directly, e.g., using \fBeval\fR. By default, \fB-configurable\fR is -\fBfalse\fR. +directly, e\&.g\&., using \fBeval\fR\&. By default, \fB-configurable\fR is +\fBfalse\fR\&. .sp A variable becomes implemented by a slot object under any of the following conditions: .RS .IP \(bu -\fB-configurable\fR equals \fBtrue\fR. +\fB-configurable\fR equals \fBtrue\fR\&. .IP \(bu -\fB-accessor\fR is one of \fBpublic\fR, \fBprotected\fR, or \fBprivate\fR. +\fB-accessor\fR is one of \fBpublic\fR, \fBprotected\fR, or \fBprivate\fR\&. .IP \(bu -\fB-incremental\fR is turned on. +\fB-incremental\fR is turned on\&. .IP \(bu -\fB-initblock\fR is a non-empty string. +\fB-initblock\fR is a non-empty string\&. .RE .IP Provided a slot object managing the variable is to be created, a custom class \fIclassName\fR from which this slot object is -to be instantiated can be set using \fB-class\fR. The -default value is \fB::nx::VariableSlot\fR. +to be instantiated can be set using \fB-class\fR\&. The +default value is \fB::nx::VariableSlot\fR\&. .sp Using \fB-initblock\fR, an optional Tcl \fIscript\fR can be defined which becomes passed into -the initialization procedure (see \fBconfigure\fR) of the variable's slot object. See -also \fB\fIinitBlock\fR for \fBcreate\fR and \fBnew\fR\fR. +the initialization procedure (see \fBconfigure\fR) of the variable's slot object\&. See +also \fB\fIinitBlock\fR for \fBcreate\fR and \fBnew\fR\fR\&. .sp By default, the variable will ascertain that a pre-existing and equally named object variable will not be overwritten -when defining the variable. In case of a conflict, an error exception +when defining the variable\&. In case of a conflict, an error exception is thrown: .CS + + % Object create obj { set :x 1 } ::obj % ::obj object variable x 2 object ::obj has already an instance variable named 'x' + .CE .IP If the switch \fB-nocomplain\fR is on, this check is omitted (continuing the above example): .CS + + % ::obj object variable -nocomplain x 2 % ::obj eval {set :x} 2 + .CE .RE .PP .SH "OBJECT SELF-REFERENCE" Objects are naturally recursive, with methods of an object \fB::obj\fR frequently invoking other methods in the same object \fB::obj\fR and -accessing \fB::obj\fR's object variables. To represent these +accessing \fB::obj\fR's object variables\&. To represent these self-references effectively in method bodies, and dependening on the usage scenario, NX offers two alternative notations for self-references: one based on a special-purpose syntax token ("colon prefix"), the other based on the -command \fBnx::current\fR. +command \fBnx::current\fR\&. .PP Both, the colon-prefix notation and \fBnx::current\fR, may be used only in method bodies and scripts -passed to \fBeval\fR. If they appear anywhere else, an error will be -reported. +passed to \fBeval\fR\&. If they appear anywhere else, an error will be +reported\&. There are three main use cases for self-references: .IP [1] As a \fIplaceholder\fR for the currently active object, \fBnx::current\fR -can be used to retrieve the object name. +can be used to retrieve the object name\&. .IP [2] -Reading and writing \fIobject variables\fR directly (i.e. without getter/setter methods in place) require the use +Reading and writing \fIobject variables\fR directly (i\&.e\&. without getter/setter methods in place) require the use of variable names carrying the prefix \fB:\fR ("colon-prefix -notation"). Internally, colon-prefixed variable names are processed -using Tcl's variable resolvers. Alternatively, one can provide for getter/setter methods for object variables (see \fBproperty\fR and \fBvariable\fR). +notation")\&. Internally, colon-prefixed variable names are processed +using Tcl's variable resolvers\&. Alternatively, one can provide for getter/setter methods for object variables (see \fBproperty\fR and \fBvariable\fR)\&. .IP [3] \fISelf-referential method calls\fR can be defined via -prefixing (\fB:\fR) the method names or, alternatively, via \fBnx::current\fR. Internally, +prefixing (\fB:\fR) the method names or, alternatively, via \fBnx::current\fR\&. Internally, colon-prefixed method names are processed using Tcl's command -resolvers. The colon-prefix notation is recommended, also because it +resolvers\&. The colon-prefix notation is recommended, also because it has a (slight) performance advantage over \fBnx::current\fR which -requires two rather than one command evaluation per method call. +requires two rather than one command evaluation per method call\&. .PP See the following listing for some examples corresponding to use cases 1--3: .CS -Object create ::obj { -puts [current]; # 1) print name of currently active object ('::obj') -set :x 1; :object variable y 2; # 2) object variables -:public object method print {} { -set z 3; # 2.a) method-local variable -puts ${:x}-${:y}-$z; # 2.b) variable substitution using '$' and ':' -puts [set :x]-[set :y]-[set z]; # 2.c) reading variables using 'set' -set :x 1; incr :y; # 2.d) writing variables using 'set', 'incr', ... -} -:public object method show {} { -:print; # 3.a) self-referential method call using ':' -[current] print; # 3.b) self-referential method call using 'nx::current' -[current object] print; # 3.c) self-referential method call using 'nx::current object' -} -:show -} + + + Object create ::obj { + # 1) print name of currently active object ('::obj') + puts [current]; + # 2) object variables + set :x 1; :object variable y 2; + :public object method print {} { + # 2\&.a) method-local variable + set z 3; + # 2\&.b) variable substitution using '$' and ':' + puts ${:x}-${:y}-$z; + # 2\&.c) reading variables using 'set' + puts [set :x]-[set :y]-[set z]; + # 2\&.d) writing variables using 'set', 'incr', \&.\&.\&. + set :x 1; incr :y; + } + :public object method show {} { + # 3\&.a) self-referential method call using ':' + :print; + # 3\&.b) self-referential method call using 'nx::current' + [current] print; + # 3\&.c) self-referential method call using 'nx::current object' + [current object] print; + } + :show + } + .CE .SH COPYRIGHT .nf -Copyright (c) 2014 Stefan Sobernig , Gustaf Neumann ; available under the Creative Commons Attribution 3.0 Austria license (CC BY 3.0 AT). +Copyright (c) 2014 Stefan Sobernig , Gustaf Neumann ; available under the Creative Commons Attribution 3\&.0 Austria license (CC BY 3\&.0 AT)\&. + .fi \ No newline at end of file