[Tcl-bugs] [ tcl-Feature Requests-1309482 ] retrieve precise line number in case of error

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Feature Requests item #1309482, was opened at 2005-09-30 06:22
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Category: 44. Parsing and Eval
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 6
Private: No
Submitted By: Nicolas Castagne (nicolascastagne)
Assigned to: Andreas Kupries (andreas_kupries)
Summary: retrieve precise line number in case of error

Initial Comment:
When using Tcl embeded in a C/C++ application in order to 
execute scripts writen by end users, it would be useful to  
easily display basic debug information to the user in case 
an error occurs. 
Among these (and as minima) the error line on which the 
error occured. 
 
Today, the errorline registered is not sufficiently precise for 
a end user.  
 
Consider the following rather simple example : 
 
 1    if 1 { 
 2        set a 2 
 3        set a 2 3 
 4    } 
 
The error is on line 3. 
Now, if we have in the C application : 
 
    result = Tcl_EvalEx(tclInterp, script, length,  
TCL_EVAL_GLOBAL); 
        if (result != TCL_OK ) { 
           Tcl_Obj *options = Tcl_GetReturnOptions(tclInterp, 
result); 
           Tcl_Obj *key = Tcl_NewStringObj("-errorline", -1); 
           Tcl_Obj *errorline; 
           Tcl_DictObjGet(NULL, options, key, &errorline); 
           printf(" ERROR line %s\n", Tcl_GetString(errorline)); 
    } 
 
the output is "ERROR line 1". 
 
Basically, the error line is not retrieved within the nested 
script of the "if" command. 
 
It would be useful to get : 
- the error line 
- the name of the procedure 
whatever the level of 'nesting' is is a script. 
 
------ 
I propose the feature request on the behalf of Don Porter, 
who asked me to do so on comp.lang.tcl 

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>Comment By: Jeffrey Hobbs (hobbs)
Date: 2007-02-09 14:37

Message:
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TIP 280 in 8.5 now.

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Comment By: Don Porter (dgp)
Date: 2006-10-10 08:07

Message:
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See TIP 280.

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