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Diffstat (limited to 'doc/interp.n')
| -rw-r--r-- | doc/interp.n | 72 |
1 files changed, 61 insertions, 11 deletions
diff --git a/doc/interp.n b/doc/interp.n index 2d2330b..6ce10ee 100644 --- a/doc/interp.n +++ b/doc/interp.n @@ -6,8 +6,6 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: interp.n,v 1.44 2010/01/20 13:42:17 dkf Exp $ -'\" .so man.macros .TH interp n 8.6 Tcl "Tcl Built-In Commands" .BS @@ -63,10 +61,18 @@ on how the alias mechanism works. A qualified interpreter name is a proper Tcl lists containing a subset of its ancestors in the interpreter hierarchy, terminated by the string naming the interpreter in its immediate master. Interpreter names are relative to the -interpreter in which they are used. For example, if \fBa\fR is a slave of -the current interpreter and it has a slave \fBa1\fR, which in turn has a -slave \fBa11\fR, the qualified name of \fBa11\fR in \fBa\fR is the list -\fBa1 a11\fR. +interpreter in which they are used. For example, if +.QW \fBa\fR +is a slave of the current interpreter and it has a slave +.QW \fBa1\fR , +which in turn has a slave +.QW \fBa11\fR , +the qualified name of +.QW \fBa11\fR +in +.QW \fBa\fR +is the list +.QW "\fBa1 a11\fR" . .PP The \fBinterp\fR command, described below, accepts qualified interpreter names as arguments; the interpreter in which the command is being evaluated @@ -110,10 +116,12 @@ invoking the command. interpreter. For example, .QW "\fBa b\fR" identifies an interpreter -\fBb\fR, which is a slave of interpreter \fBa\fR, which is a slave -of the invoking interpreter. An empty list specifies the interpreter -invoking the command. \fIsrcCmd\fR gives the name of a new -command, which will be created in the source interpreter. +.QW \fBb\fR , +which is a slave of interpreter +.QW \fBa\fR , +which is a slave of the invoking interpreter. An empty list specifies +the interpreter invoking the command. \fIsrcCmd\fR gives the name of +a new command, which will be created in the source interpreter. \fITargetPath\fR and \fItargetCmd\fR specify a target interpreter and command, and the \fIarg\fR arguments, if any, specify additional arguments to \fItargetCmd\fR which are prepended to any arguments specified @@ -186,6 +194,48 @@ given name already exists in this master. The initial recursion limit of the slave interpreter is set to the current recursion limit of its parent interpreter. .TP +\fBinterp\fR \fBdebug \fIpath\fR ?\fB\-frame\fR ?\fIbool\fR?? +. +Controls whether frame-level stack information is captured in the +slave interpreter identified by \fIpath\fR. If no arguments are +given, option and current setting are returned. If \fB\-frame\fR +is given, the debug setting is set to the given boolean if provided +and the current setting is returned. +This only effects the output of \fBinfo frame\fR, in that exact +frame-level information for command invocation at the bytecode level +is only captured with this setting on. +.RS +.PP +For example, with code like +.PP +.CS +\fBproc\fR mycontrol {... script} { + ... + \fBuplevel\fR 1 $script + ... +} + +\fBproc\fR dosomething {...} { + ... + mycontrol { + somecode + } +} +.CE +.PP +the standard setting will provide a relative line number for the +command \fBsomecode\fR and the relevant frame will be of type +\fBeval\fR. With frame-debug active on the other hand the tracking +extends so far that the system will be able to determine the file and +absolute line number of this command, and return a frame of type +\fBsource\fR. This more exact information is paid for with slower +execution of all commands. +.PP +Note that once it is on, this flag cannot be switched back off: such +attempts are silently ignored. This is needed to maintain the +consistency of the underlying interpreter's state. +.RE +.TP \fBinterp\fR \fBdelete \fR?\fIpath ...?\fR . Deletes zero or more interpreters given by the optional \fIpath\fR @@ -296,7 +346,7 @@ already trusted. Returns the maximum allowable nesting depth for the interpreter specified by \fIpath\fR. If \fInewlimit\fR is specified, the interpreter recursion limit will be set so that nesting -of more than \fInewlimit\fR calls to \fBTcl_Eval()\fR +of more than \fInewlimit\fR calls to \fBTcl_Eval\fR and related procedures in that interpreter will return an error. The \fInewlimit\fR value is also returned. The \fInewlimit\fR value must be a positive integer between 1 and the |