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The fix is as simple as adding a loop to continue to lookup values
in the hash table until one of the following termination conditions:
1. The token we look up has no definition
2. We get back the original symbol we started with
This second termination condition prevents infinite iteration.
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Where one macro is defined in terms of another macro. The current
implementation does not yet deal with this correctly.
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Mostly this is a place for me to write down the URLs of the GLSL and
C99 specifications that I need to write this code.
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Validate desired test cases by ensuring the output of glcpp matches
the output of the gcc preprocessor, (ignoring any lines of the gcc
output beginning with '#').
Only one test case so far with a trivial #define.
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By using the recently-imported hash_table implementation.
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This compiles the debugging code for teh parser. It's not active
unless the yydebug variable is set to a non-zero value.
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The preprocessor here is intended to become part of the glsl2 codebase
eventually anyway.
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To ignore generated source files (and glcpp binary).
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Most of the current problems were (mostly) harmless things like
missing declarations, but there was at least one real error, (reversed
argument order for yyerrror).
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This allows the final program to be 100% "valgrind clean", (freeing
all memory that it allocates). This will make it much easier to ensure
that any allocation that parser actions perform are also cleaned up.
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It doesn't really *do* anything yet---merlely parsing a stream of
whitespace-separated tokens, (and not interpreting them at all).
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