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mesa/src/glsl/glcpp/tests/008-define-empty.c.expected
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Carl Worth e1acbfca32 glcpp: Avoid accidental token pasting in preprocessed result.
Consider this test case:

	#define EMPTY
	int foo = 1+EMPTY+4;

The expression should compile as the sequence of tokens 1, PLUS,
UNARY_POSITIVE, 4. But glcpp has been failing for this case since it
results in the string "1++4" which a compiler correctly sees as a
syntax error, (1, POST_INCREMENT, 4).

We fix this by changing any macro with an empty definition to result
in a single SPACE token rather than nothing. This then gives "1+ +4"
which compiles correctly.

This commit does touch up the two existing test cases which already
have empty macros, (to add the space to the expected result).

It also adds a new test case to exercise the above scenario.
2010-07-20 17:01:12 -07:00

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