man/man3/Tcl_WrongNumArgs.3 - toolchains/skids - Git at Google

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 '\" RCS: @(#) $Id: WrongNumArgs.3,v 1.5 2002/07/01 18:24:39 jenglish Exp $
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 '\" The definitions below are for supplemental macros used in Tcl/Tk
 '\" manual entries.
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 '\" .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,
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 '\"	Give maximum sizes of arguments for setting tab stops.  Type and
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 '\"	options follow on successive lines, in four columns separated
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 '\" .SE
 '\"	End of list of standard options for a Tk widget.
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 '\" .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 1.4 2000/08/25 06:18:32 ericm Exp $
 '\"
 '\"	# 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
 .de AP
 .ie !"\\$4"" .TP \\$4
 .el \{\
 .   ie !"\\$2"" .TP \\n()Cu
 .   el          .TP 15
 .\}
 .ta \\n()Au \\n()Bu
 .ie !"\\$3"" \{\
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 .AS Tcl_Interp Tcl_CreateInterp in/out
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 .\}
 .el \}\
 \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
 .\}
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 ..
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 See the \\fBoptions\\fR manual entry for details on the standard options.
 ..
 '\"	# OP - start of full description for a single option
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 .LP
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 Command-Line Name:	\\fB\\$1\\fR
 Database Name:	\\fB\\$2\\fR
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 .de UL
 \\$1\l'|0\(ul'\\$2
 ..
 .TH Tcl_WrongNumArgs 3 8.0 Tcl "Tcl Library Procedures"
 .BS
 .SH NAME
 Tcl_WrongNumArgs \- generate standard error message for wrong number of arguments
 .SH SYNOPSIS
 .nf
 \fB#include <tcl.h>\fR
 .sp
 \fBTcl_WrongNumArgs\fR(\fIinterp, objc, objv, message\fR)
 .SH ARGUMENTS
 .AS Tcl_Interp "*CONST objv[]"
 .AP Tcl_Interp interp in
 Interpreter in which error will be reported: error message gets stored
 in its result object.
 .AP int objc in
 Number of leading arguments from \fIobjv\fR to include in error
 message.
 .AP Tcl_Obj "*CONST\ objv[]" in
 Arguments to command that had the wrong number of arguments.
 .AP "CONST char" *message in
 Additional error information to print after leading arguments
 from \fIobjv\fR.  This typically gives the acceptable syntax
 of the command.  This argument may be NULL.
 .BE

 .SH DESCRIPTION
 .PP
 \fBTcl_WrongNumArgs\fR is a utility procedure that is invoked by
 command procedures when they discover that they have received the
 wrong number of arguments.  \fBTcl_WrongNumArgs\fR generates a
 standard error message and stores it in the result object of
 \fIinterp\fR.  The message includes the \fIobjc\fR initial
 elements of \fIobjv\fR plus \fImessage\fR.  For example, if
 \fIobjv\fR consists of the values \fBfoo\fR and \fBbar\fR,
 \fIobjc\fR is 1, and \fImessage\fR is ``\fBfileName count\fR''
 then \fIinterp\fR's result object will be set to the following
 string:
 .CS
 wrong # args: should be "foo fileName count"
 .CE
 If \fIobjc\fR is 2, the result will be set to the following string:
 .CS
 wrong # args: should be "foo bar fileName count"
 .CE
 \fIObjc\fR is usually 1, but may be 2 or more for commands like
 \fBstring\fR and the Tk widget commands, which use the first argument
 as a subcommand.
 .PP
 Some of the objects in the \fIobjv\fR array may be abbreviations for
 a subcommand.  The command
 \fBTcl_GetIndexFromObj\fR will convert the abbreviated string object
 into an \fIindexObject\fR.  If an error occurs in the parsing of the
 subcommand we would like to use the full subcommand name rather than
 the abbreviation.  If the \fBTcl_WrongNumArgs\fR command finds any
 \fIindexObjects\fR in the \fIobjv\fR array it will use the full subcommand
 name in the error message instead of the abbreviated name that was
 originally passed in.  Using the above example, lets assume that
 \fIbar\fR is actually an abbreviation for \fIbarfly\fR and the object
 is now an indexObject because it was passed to
 \fBTcl_GetIndexFromObj\fR.  In this case the error message would be:
 .CS
 wrong # args: should be "foo barfly fileName count"
 .CE

 .SH "SEE ALSO"
 Tcl_GetIndexFromObj

 .SH KEYWORDS
 command, error message, wrong number of arguments
	'\"
	'\" Copyright (c) 1994-1997 Sun Microsystems, Inc.
	'\"
	'\" See the file "license.terms" for information on usage and redistribution
	'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
	'\"
	'\" RCS: @(#) $Id: WrongNumArgs.3,v 1.5 2002/07/01 18:24:39 jenglish Exp $
	'\"
	'\" 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 1.4 2000/08/25 06:18:32 ericm Exp $
	'\"
	'\" # 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
	.de AP
	.ie !"\\$4"" .TP \\$4
	.el \{\
	. ie !"\\$2"" .TP \\n()Cu
	. el .TP 15
	.\}
	.ta \\n()Au \\n()Bu
	.ie !"\\$3"" \{\
	\&\\$1 \\fI\\$2\\fP (\\$3)
	.\".b
	.\}
	.el \{\
	.br
	.ie !"\\$2"" \{\
	\&\\$1 \\fI\\$2\\fP
	.\}
	.el \{\
	\&\\fI\\$1\\fP
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	..
	'\" # define tabbing values for .AP
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	.nr )A 10n
	.if !"\\$1"" .nr )A \\w'\\$1'u+3n
	.nr )B \\n()Au+15n
	.\"
	.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
	.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
	.de BS
	.br
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	.\" Draw four-sided box normally, but don't draw top of
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	\h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
	.\}
	.el \}\
	\h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
	.\}
	.\}
	.fi
	.br
	.nr ^b 0
	..
	'\" # VS - start vertical sidebar
	'\" # ^Y = starting y location
	'\" # ^v = 1 (for troff; for nroff this doesn't matter)
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	.el .nr ^v 1u
	..
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	.ie n 'mc
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	.sp -1
	.fi
	.ev
	.\}
	.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.
	.de ^B
	.ev 2
	'ti 0
	'nf
	.mk ^t
	.if \\n(^b \{\
	.\" Draw three-sided box if this is the box's first page,
	.\" draw two sides but no top otherwise.
	.ie !\\n(^b-1 \h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
	.el \h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
	.\}
	.if \\n(^v \{\
	.nr ^x \\n(^tu+1v-\\n(^Yu
	\kx\h'-\\nxu'\h'\|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'\|0u'\c
	.\}
	.bp
	'fi
	.ev
	.if \\n(^b \{\
	.mk ^y
	.nr ^b 2
	.\}
	.if \\n(^v \{\
	.mk ^Y
	.\}
	..
	'\" # DS - begin display
	.de DS
	.RS
	.nf
	.sp
	..
	'\" # DE - end display
	.de DE
	.fi
	.RE
	.sp
	..
	'\" # SO - start of list of standard options
	.de SO
	.SH "STANDARD OPTIONS"
	.LP
	.nf
	.ta 5.5c 11c
	.ft B
	..
	'\" # 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.
	..
	'\" # OP - start of full description for a single option
	.de OP
	.LP
	.nf
	.ta 4c
	Command-Line Name: \\fB\\$1\\fR
	Database Name: \\fB\\$2\\fR
	Database Class: \\fB\\$3\\fR
	.fi
	.IP
	..
	'\" # CS - begin code excerpt
	.de CS
	.RS
	.nf
	.ta .25i .5i .75i 1i
	..
	'\" # CE - end code excerpt
	.de CE
	.fi
	.RE
	..
	.de UL
	\\$1\l'\|0\(ul'\\$2
	..
	.TH Tcl_WrongNumArgs 3 8.0 Tcl "Tcl Library Procedures"
	.BS
	.SH NAME
	Tcl_WrongNumArgs \- generate standard error message for wrong number of arguments
	.SH SYNOPSIS
	.nf
	\fB#include <tcl.h>\fR
	.sp
	\fBTcl_WrongNumArgs\fR(\fIinterp, objc, objv, message\fR)
	.SH ARGUMENTS
	.AS Tcl_Interp "*CONST objv[]"
	.AP Tcl_Interp interp in
	Interpreter in which error will be reported: error message gets stored
	in its result object.
	.AP int objc in
	Number of leading arguments from \fIobjv\fR to include in error
	message.
	.AP Tcl_Obj "*CONST\ objv[]" in
	Arguments to command that had the wrong number of arguments.
	.AP "CONST char" *message in
	Additional error information to print after leading arguments
	from \fIobjv\fR. This typically gives the acceptable syntax
	of the command. This argument may be NULL.
	.BE

	.SH DESCRIPTION
	.PP
	\fBTcl_WrongNumArgs\fR is a utility procedure that is invoked by
	command procedures when they discover that they have received the
	wrong number of arguments. \fBTcl_WrongNumArgs\fR generates a
	standard error message and stores it in the result object of
	\fIinterp\fR. The message includes the \fIobjc\fR initial
	elements of \fIobjv\fR plus \fImessage\fR. For example, if
	\fIobjv\fR consists of the values \fBfoo\fR and \fBbar\fR,
	\fIobjc\fR is 1, and \fImessage\fR is ``\fBfileName count\fR''
	then \fIinterp\fR's result object will be set to the following
	string:
	.CS
	wrong # args: should be "foo fileName count"
	.CE
	If \fIobjc\fR is 2, the result will be set to the following string:
	.CS
	wrong # args: should be "foo bar fileName count"
	.CE
	\fIObjc\fR is usually 1, but may be 2 or more for commands like
	\fBstring\fR and the Tk widget commands, which use the first argument
	as a subcommand.
	.PP
	Some of the objects in the \fIobjv\fR array may be abbreviations for
	a subcommand. The command
	\fBTcl_GetIndexFromObj\fR will convert the abbreviated string object
	into an \fIindexObject\fR. If an error occurs in the parsing of the
	subcommand we would like to use the full subcommand name rather than
	the abbreviation. If the \fBTcl_WrongNumArgs\fR command finds any
	\fIindexObjects\fR in the \fIobjv\fR array it will use the full subcommand
	name in the error message instead of the abbreviated name that was
	originally passed in. Using the above example, lets assume that
	\fIbar\fR is actually an abbreviation for \fIbarfly\fR and the object
	is now an indexObject because it was passed to
	\fBTcl_GetIndexFromObj\fR. In this case the error message would be:
	.CS
	wrong # args: should be "foo barfly fileName count"
	.CE

	.SH "SEE ALSO"
	Tcl_GetIndexFromObj

	.SH KEYWORDS
	command, error message, wrong number of arguments