80 lines
1.5 KiB
C++
80 lines
1.5 KiB
C++
enum precision
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{
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packed_highp,
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packed_mediump,
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packed_lowp,
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aligned_highp,
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aligned_mediump,
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aligned_lowp,
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aligned = aligned_highp,
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highp = packed_highp,
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mediump = packed_mediump,
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lowp = packed_lowp,
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packed = packed_highp,
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defaultp = highp
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};
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template<typename T, precision P = defaultp> struct vec2;
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template<typename T>
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struct _swizzle_base0
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{
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char _buffer[1];
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};
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template<typename T, precision P, int E0, int E1, int E2, int E3>
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struct _swizzle_base1 : public _swizzle_base0<T>
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{
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};
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template<typename T, precision P, int E0, int E1>
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struct _swizzle_base1<T, P, E0,E1,-1,-2> : public _swizzle_base0<T>
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{
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};
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template<typename T, precision P, int E0, int E1, int E2, int E3, int DUPLICATE_ELEMENTS>
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struct _swizzle_base2 : public _swizzle_base1<T, P, E0,E1,E2,E3>
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{
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};
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template<typename T, precision P, int E0, int E1, int E2, int E3>
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struct _swizzle_base2<T, P, E0,E1,E2,E3, 1> : public _swizzle_base1<T, P, E0,E1,E2,E3>
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{
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};
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template<typename T, precision P, int E0, int E1, int E2, int E3>
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struct _swizzle : public _swizzle_base2<T, P, E0, E1, E2, E3, (E0 == E1 || E0 == E2 || E0 == E3 || E1 == E2 || E1 == E3 || E2 == E3)>
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{
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};
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template<typename T, precision P>
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struct vec2
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{
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constexpr vec2(T x, T y) :
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x(x), y(y)
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{}
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union
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{
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struct { T x, y; };
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struct { _swizzle<T, P, 0,0,-1,-2> xx; };
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};
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};
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typedef vec2<float, defaultp> float2;
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// Visual C++ has a bug generating the error: fatal error C1001: An internal error has occurred in the compiler.
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float2 const Bar(1.f, 1.f);
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int main()
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{
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return 0;
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}
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