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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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36
Test/preprocessor.cpp_style___FILE__.vert Normal file
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@ -0,0 +1,36 @@
#extension GL_GOOGLE_cpp_style_line_directive : enable
__FILE__
#line 150 "a.h"
__FILE__
#line 24
__FILE__
#line 42
__FILE__
#line 30 "b.cc"
__FILE__
#line 10 3
__FILE__
#line 48
__FILE__
#line 4
__FILE__
#line 55 100
__FILE__
#line 1000 "c"
__FILE__
#line 42 1
__FILE__
#line 42 "this-is-a-quite-long-name-maybe-i-should-shorten-it"
__FILE__