d485e0b710
Implement token pasting as per the C++ specification, within the current style of the PP code. Non-identifiers (turning 12 ## 10 into the numeral 1210) is not yet covered; they should be a simple incremental change built on this one. Addresses issue #255.
53 lines
2.3 KiB
GLSL
53 lines
2.3 KiB
GLSL
#version 450
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// side test verifies multiple rounds of argument expansion
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#define bear SecondExpansion
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#define mmmB bear
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#define mmmA(a) a
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int mmmA(mmmB); // mmmB -> bear, and then in mmmA(), bear -> SecondExpansion
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// pasting skips the first round of expansion
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#define mmcatmmdog PostPasteExpansion
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#define mmcat cat
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#define mmdog dog
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#define mmp(a,b) a## b
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int mmp(mmcat, mmdog); // mmcat/mmdog not expanded, mmcatmmdog -> PostPasteExpansion
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// multi-token pre
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#define mmtokpastepre(a) a##27
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mmtokpastepre(float foo); // should declare "float foo27;"
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// multi-token post
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#define mmtokpastepost(a) uni ##a
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mmtokpastepost(form float foo155); // should declare "uniform float foo155;"
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// non-first argument
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#define foo ShouldntExpandToThis
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#define semi ;
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#define bothpaste(a,b) a##b
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float bothpaste(foo, 719); // should declare "float foo719;"
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#define secpaste(a,b) a bar ## b
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secpaste(uniform float, foo semi) // should declare "uniform float barfoo;"
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// no args
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#define noArg fl##oat
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noArg argless;
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// bad location
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#define bad1 ## float
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bad1 dc1;
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#define bad2 float ##
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bad2 dc2;
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// multiple ##
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#define multiPaste(a, b, c) a##or##b flo##at foo##c
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multiPaste(unif, m, 875);
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// too long
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#define simplePaste(a,b) a##b
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// 1020 + 5 characters
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float simplePaste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// non-identifiers
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int a = simplePaste(11,12);
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