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Tcl Errorinfo


Feb 7 '10 at 3:02 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using to match your example for test1, if you redefined three as follows: proc three {} { catch {four} puts $::errorInfo } And you evaluated if {[catch {one}]} { puts "Found an Privacy policy About Wikibooks Disclaimers Developers Cookie statement Mobile view NAME · SYNOPSIS · ARGUMENTS · DESCRIPTION · SEE ALSO · KEYWORDS Documentation generated from fossil trunk NAME Tcl_GetReturnOptions, Tcl_SetReturnOptions, Tcl_AddErrorInfo, If an error is returned without calling Tcl_SetObjErrorCode or Tcl_SetErrorCode the Tcl interpreter automatically sets the -errorcode return option to NONE.

The earlier found, the easier for the coder, so the golden rule "Test early. intcode  The code returned from script evaluation. Why were weapons like Mandrakes and Acromantula, which kill indiscriminately, used in the Battle of Hogwarts? If assertions are tested, it only happens at the position where they stand in the code.

Tcl Catch Example

If the -errorcode option is specified then code provides a value for the errorCode variable. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Why did the humans never use EMP bombs to kill the machines in The Matrix? The procedure Tcl_SetObjErrorCode is used to set the -errorcode return option to the list value errorObjPtr built up by the caller.

Tcl_AddErrorInfo may be used for this purpose: its message argument is an additional string to be appended to the -errorinfo option. Tcl packages can define new commands that return other integer values as return codes as well, and scripts that make use of the return -code command can also have return codes Otherwise it is 1. Tcl Return Error The integer completion code should be passed as the code argument to Tcl_GetReturnOptions so that all required options will be present in the dictionary.

The output will go to stdout - the console from where you started the script. If however you feed this file directly to a tclsh, that fact is detected, and the "e.g." calls are executed. Browse other questions tagged tcl stack-trace or ask your own question. Tcl_LogCommandInfo is invoked after an error occurs in an interpreter.

The dictionary may be written to, either adding, removing, or overwriting any entries in it, without the need to check for a shared value. Invalid Command Name Tcl EXCEPTIONAL RETURN CODES In addition to the result of a procedure, the return code of a procedure may also be set by return through use of the -code option. Don't be afraid to do something wrong - it will most often deliver a helpful error message. As with any Tcl_Obj with reference count of zero, it is up to the caller to arrange for its disposal with Tcl_DecrRefCount or to a reference to it via Tcl_IncrRefCount (or

Tcl Error Handling

If the code argument is not present, then errorCode is automatically reset to ``NONE'' by the Tcl interpreter as part of processing the error generated by the command. http://stackoverflow.com/questions/2193731/stack-trace-info-in-errorinfo-in-tcl Let's just create a valid one: % proc hello {} {puts Hi!} Silently acknowledged. Tcl Catch Example Generates an error condition and forces the Tcl call stack to unwind, with error information being added at each step. Tcl Error Command If the info argument is provided and is non-empty, it is used to initialize the global variable errorInfo.

Join them; it only takes a minute: Sign up stack trace info in errorInfo in Tcl up vote 4 down vote favorite If using Tcl in interactive mode , in which This variable is intended to hold a machine-readable description of the error in cases where such information is available; see the tclvars manual page for information on the proper format for A typical usage for Tcl_GetReturnOptions is to retrieve the stack trace when script evaluation returns TCL_ERROR, like so: int code = Tcl_Eval(interp, script); if (code == TCL_ERROR) { Tcl_Obj *options = If the info argument is present, it is used to initialize the -errorinfo return options and the first increment of unwind information will not be added by the Tcl interpreter. Tcl Catch Exec

Critchlow Jr. The problem is : in non-interactive mode when I want to catch this error and then puts the errorInfo to get a stack trace, it'll merely display the terse info. Can a PET 2001 be physically damaged from BASIC? Tcl_AppendObjToErrorInfo is called when the string value to be appended to the -errorinfo option is available as a Tcl_Obj instead of as a char array.

Unable to complete a task at work. Tcl Error Code if { [catch {open $someFile w} fid] } { puts stderr "Could not open $someFile for writing\n$fid" exit 1 } There are more complex examples of catch usage in the documentation The programmer can then decide what to do about those errors and act accordingly, instead of having the whole application come to a halt.

The procedure Tcl_GetErrorLine is used to read the integer value of the -errorline return option without the overhead of a full call to Tcl_GetReturnOptions.

Better ideas welcome. Script or function to return how many days from now until a given date How many dimensions does electricity have? Examples from a remo session, showing that the two have different pids, how errors are reported, and that quoting is different from normal (needs more work): 10 % pid 600 11 Tcl Proc Return Value If the result is not the one expected, this is reported on stdout; and in the end, you even get a little statistics.

If the option is not specified then errorCode will default to NONE. In other words, the command containing the error command will not appear in the stack trace; in its place will be info. value Value must be an integer; it will be returned as the return code for the current procedure. The -code option is rarely used. intlineNum  The line number of a script where an error occurred.

The catch command returns 0 if there is no error, and 1 if there is an error. too hot!"} Where the error occurred is evident from::errorInfo, which will look a bit clearer (no mention of the error command) if you code if {$temperature > 100} {return -code error It is sometimes useful to add additional information to the -errorinfo value beyond what can be supplied automatically by the script evaluation routines. Copyright © 1994-1996 Sun Microsystems, Inc.

If options contains any invalid value for any key, TCL_ERROR will be returned, and the interp result will be set to an appropriate error message. The -errorinfo option specifies an initial stack trace for the errorInfo variable; if it is not specified then the stack trace left in errorInfo will include the call to the procedure The user types something in and sees what comes out: either the result or an error message. Tcl defines the normal return code from script evaluation to be zero (0), or TCL_OK.

But I couldn't find an easy solution to that quirk in this breakfast fun project - backslashing the $condition in the assertt code sure didn't help. Likewise, Tcl_SetErrorLine sets the -errorline return option value. Using a trace, it is also possible to specify a condition once, and have it tested whenever a variable's value changes: proc assertt {varName condition} { uplevel 1 [list trace var If the message needs to contain the null character U+0000, Tcl's usual internal encoding rules should be used to avoid the need for a null byte.

You can resize the whole thing with console eval {wm geometry . $Wx$H+$X+$Y} where $W and $H are dimensions in character cells (default 80x24), but $X and $Y are in pixels. The console is normally hidden, but can be brought up with the command console show You can also use the partially documented "console" command. "console eval script" evals the given script Tcl_Obj*options  A dictionary of return options.