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Extend the syntax of #line and __FILE__ to support filename strings.

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According to the GLSL spec, the second parameter to #line should be
an integer source string number and __FILE__ will be substituted
with the integer source string number currently processed. This
patch extends the syntax of #line and __FILE__. Now #line accepts
as the second parameter a filename string quoted by double quotation
marks. And if such a #line is set, __FILE__ will be substituted with
the currently set filename string. The implementation is done via
introducing a new extension GL_GOOGLE_cpp_style_line_directive using
the extension framework.

The purpose is to support cpp-style #line directives, which is
required by #include.
This commit is contained in:
Lei Zhang
2015-06-25 17:53:54 -04:00
parent c777fc2c4c
commit 5011fbebc3
16 changed files with 176 additions and 19 deletions
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Test/test-preprocessor-list
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@@ -1,3 +1,4 @@
preprocessor.cpp_style_line_directive.vert
preprocessor.edge_cases.vert
preprocessor.errors.vert
preprocessor.extensions.vert