[Tcl-bugs] [ tcl-Feature Requests-684982 ] remove TCL_BRACKET_TERM

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Feature Requests item #684982, was opened at 2003-02-11 18:09
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Category: 43. Parsing and Eval
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Don Porter (dgp)
Assigned to: miguel sofer (msofer)
Summary: remove TCL_BRACKET_TERM

Initial Comment:

One of the flag values that can be
set in interp->evalFlags is
TCL_BRACKET_TERM.

Setting this causes both
Tcl_EvalEx() and TclSetByteCodeFromAny()
to parse only to the next unquoted close-bracket
when do evaluation or compilation in
the interp.

The only user of this power appears to
be the command substitution portion
of the [subst] command.

It seems to me that the same effect
could be achieved by appropriate
calls to Tcl_ParseCommand() with
its documented "nested" argument,
rather than hacking around the
internals of the interp structure.

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>Comment By: Don Porter (dgp)
Date: 2003-02-11 19:03

Message:
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The TclPro program tclcompiler
directly calls TclSetByteCodeFromAny,
so it's possible it cares about this
TCL_BRACKET_TERM matter.

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Comment By: Don Porter (dgp)
Date: 2003-02-11 18:19

Message:
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Using the Tcl test suite as
a poor man's coverage test
for the Tcl source code, it
appears that the code
testing for TCL_BRACKET_TERM
being set in 
TclSetByteCodeFromAny()
is never active.

If that's true, then TCL_BRACKET_TERM
appear to exist only to configure a
particular mode of operation in Tcl_EvalEx().
Would be better not to call Tcl_EvalEx()
at all, but use Tcl_ParseCommand() and
friends within Tcl_SubstObjCmd

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