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author | Carl Worth <[email protected]> | 2010-07-20 16:44:03 -0700 |
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committer | Ian Romanick <[email protected]> | 2010-07-20 17:01:12 -0700 |
commit | e1acbfca322c4ac720707ec8d3fda08fab65a30b (patch) | |
tree | 2ff0280eab03abc0c9c8655f050ea2ecb9567bdd /src/mesa/main/get.c | |
parent | 942ccc517012e360a7e30d3322331c8450dda022 (diff) |
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.
Diffstat (limited to 'src/mesa/main/get.c')
0 files changed, 0 insertions, 0 deletions