[antlr-interest] Re: ANTLR status wrt Visual C++ 6.0

[Michael Searles]

thanks for the reply Ric.

> Try 2.7.4 first I'd say. Although this particular output does not 
ring a
> bell.. If 2.7.4 gives these errors as well then it would help to see 
some
> generated code. _retTree is an attribute of the treewalker class.

ok, I've got 2.7.4 now.

_retTree and returnAST are commented out in the distro.

antlr-2.7.4\antlr-2.7.4\lib\cpp\antlr\TreeParser.hpp:

/* Where did this rule leave off parsing; avoids a return parameter */
//RefAST _retTree;
/* AST return value for a rule is squirreled away here */
//RefAST returnAST;

and _retTree is commented out in:
antlr-2.7.4\antlr-2.7.4\lib\cpp\antlr\Parser.hpp:

//	/// AST return value for a rule is squirreled away here
//	RefAST returnAST;

are these supposed to be commented out?

The 2.7.4 antlr.jar is generating code that expects them.

generated CalcParser.cpp:

void CalcParser::expr() {
	returnAST = ANTLR_USE_NAMESPACE(antlr)nullAST;
.
.

generated CalcTreeWalker.cpp:

float  CalcTreeWalker::expr(ANTLR_USE_NAMESPACE(antlr)RefAST _t) {
.
.
.
    _t = _retTree;







 
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