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/*
* tclCompExpr.c --
*
* This file contains the code to parse and compile Tcl expressions
* and implementations of the Tcl commands corresponding to expression
* operators, such as the command ::tcl::mathop::+ .
*
* Contributions from Don Porter, NIST, 2006-2007. (not subject to US copyright)
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclCompExpr.c,v 1.95 2008/01/23 19:41:28 dgp Exp $
*/
#include "tclInt.h"
#include "tclCompile.h" /* CompileEnv */
/*
* Expression parsing takes place in the routine ParseExpr(). It takes a
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/*
* tclCompExpr.c --
*
* This file contains the code to parse and compile Tcl expressions
* and implementations of the Tcl commands corresponding to expression
* operators, such as the command ::tcl::mathop::+ .
*
* Contributions from Don Porter, NIST, 2006-2007. (not subject to US copyright)
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclCompExpr.c,v 1.96 2008/02/26 21:50:51 jenglish Exp $
*/
#include "tclInt.h"
#include "tclCompile.h" /* CompileEnv */
/*
* Expression parsing takes place in the routine ParseExpr(). It takes a
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* The mark field is use to control the traversal of the tree, so
* that it can be done non-recursively. The mark values are:
*/
enum Marks {
MARK_LEFT, /* Next step of traversal is to visit left subtree */
MARK_RIGHT, /* Next step of traversal is to visit right subtree */
MARK_PARENT, /* Next step of traversal is to return to parent */
};
/*
* The constant field is a boolean flag marking which subexpressions are
* completely known at compile time, and are eligible for computing then
* rather than waiting until run time.
*/
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* The mark field is use to control the traversal of the tree, so
* that it can be done non-recursively. The mark values are:
*/
enum Marks {
MARK_LEFT, /* Next step of traversal is to visit left subtree */
MARK_RIGHT, /* Next step of traversal is to visit right subtree */
MARK_PARENT /* Next step of traversal is to return to parent */
};
/*
* The constant field is a boolean flag marking which subexpressions are
* completely known at compile time, and are eligible for computing then
* rather than waiting until run time.
*/
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