X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=util%2Fsrc%2FTclTk%2Ftcl8.6.12%2Fdoc%2FWrongNumArgs.3;fp=util%2Fsrc%2FTclTk%2Ftcl8.6.12%2Fdoc%2FWrongNumArgs.3;h=93e2ebb0fbd4a32d4d643805028dc4e9f76003d8;hb=c46db33a83894f24189046ef665713fe320fef71;hp=0000000000000000000000000000000000000000;hpb=542a195bc3d4acf4245305f6be3f1ca58d072076;p=eos%2Fbase.git diff --git a/util/src/TclTk/tcl8.6.12/doc/WrongNumArgs.3 b/util/src/TclTk/tcl8.6.12/doc/WrongNumArgs.3 new file mode 100644 index 0000000000..93e2ebb0fb --- /dev/null +++ b/util/src/TclTk/tcl8.6.12/doc/WrongNumArgs.3 @@ -0,0 +1,79 @@ +'\" +'\" 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. +'\" +.TH Tcl_WrongNumArgs 3 8.0 Tcl "Tcl Library Procedures" +.so man.macros +.BS +.SH NAME +Tcl_WrongNumArgs \- generate standard error message for wrong number of arguments +.SH SYNOPSIS +.nf +\fB#include \fR +.sp +\fBTcl_WrongNumArgs\fR(\fIinterp, objc, objv, message\fR) +.SH ARGUMENTS +.AS "Tcl_Obj *const" *message +.AP Tcl_Interp interp in +Interpreter in which error will be reported: error message gets stored +in its result value. +.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 value 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 +.QW "\fBfileName count\fR" +then \fIinterp\fR's result value will be set to the following +string: +.PP +.CS +wrong # args: should be "foo fileName count" +.CE +.PP +If \fIobjc\fR is 2, the result will be set to the following string: +.PP +.CS +wrong # args: should be "foo bar fileName count" +.CE +.PP +\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 values in the \fIobjv\fR array may be abbreviations for +a subcommand. The command +\fBTcl_GetIndexFromObj\fR will convert the abbreviated string value +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, let us assume that +\fIbar\fR is actually an abbreviation for \fIbarfly\fR and the value +is now an \fIindexObject\fR because it was passed to +\fBTcl_GetIndexFromObj\fR. In this case the error message would be: +.PP +.CS +wrong # args: should be "foo barfly fileName count" +.CE +.SH "SEE ALSO" +Tcl_GetIndexFromObj(3) +.SH KEYWORDS +command, error message, wrong number of arguments