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https://github.com/KhronosGroup/glslang
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26d3145334
This PR adds support for default function parameters in the following cases:
1. Simple constants, such as void fn(int x, float myparam = 3)
2. Expressions that can be const folded, such a ... myparam = sin(some_const)
3. Initializer lists that can be const folded, such as ... float2 myparam = {1,2}
New tests are added: hlsl.params.default.frag and hlsl.params.default.err.frag
(for testing error situations, such as ambiguity or non-const-foldable).
In order to avoid sampler method ambiguity, the hlsl better() lambda now
considers sampler matches. Previously, all sampler types looked identical
since only the basic type of EbtSampler was considered.
51 lines
1.2 KiB
GLSL
51 lines
1.2 KiB
GLSL
uniform int4 ui4;
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uniform float ufvar;
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static const int cia = -4;
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static const int cib = -42;
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int4 fn1(int4 p0) { return int4(1,2,3,4); }
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int4 fn1(int4 p0, bool b1, bool b2 = false) {
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return p0;
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}
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int4 fn1(int4 p0,
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int4 p1 : FOO = int4(-1,-2,-3, cia),
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int p2[2] : BAR = { int(1), 2 },
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int p3 = abs(cib) )
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{
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return p0 + p1 + p2[0] + p3;
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}
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// These should not be ambiguous if given either an int or a float explicit second parameter.
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int4 fn2(int4 p0, int x = 3)
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{
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return int4(10,11,12,13);
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}
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int4 fn2(int4 p0, float x = ufvar) // ERROR: non-const expression
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{
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return p0 + int4(20,21,22,23);
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}
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void fn3(int p0 = 5, int p1) // ERROR no-default param after default param
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{
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}
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int4 main() : SV_Target0
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{
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int myarray[2] = {30,31};
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return fn1(100) + // ERROR: ambiguous
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fn1(101, ui4) +
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fn1(102, ui4, myarray) +
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fn1(103, ui4, myarray, 99) +
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fn1(104, false) +
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fn1(105, false, true) +
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fn2(112) + // ERROR: ambiguous
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fn2(110, 11.11) + // calls int4, float form
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fn2(111, 12); // calls int4, int form
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}
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