1*67e74705SXin Li // RUN: %clang_cc1 %s -verify -fsyntax-only -pedantic 2*67e74705SXin Li 3*67e74705SXin Li // This file tests the clang extension which allows initializing the components 4*67e74705SXin Li // of a complex number individually using an initialization list. Basically, 5*67e74705SXin Li // if you have an explicit init list for a complex number that contains two 6*67e74705SXin Li // initializers, this extension kicks in to turn it into component-wise 7*67e74705SXin Li // initialization. 8*67e74705SXin Li // 9*67e74705SXin Li // This extension is useful because there isn't any way to accurately build 10*67e74705SXin Li // a complex number at the moment besides setting the components with 11*67e74705SXin Li // __real__ and __imag__, which is inconvenient and not usable for constants. 12*67e74705SXin Li // (Of course, there are other extensions we could implement that would 13*67e74705SXin Li // allow this, like some sort of __builtin_build_complex.) 14*67e74705SXin Li // 15*67e74705SXin Li // FIXME: It would be a good idea to have a warnings for implicit 16*67e74705SXin Li // real->complex and complex->real conversions; as-is, it's way too easy 17*67e74705SXin Li // to get implicit conversions when they are not intended. 18*67e74705SXin Li 19*67e74705SXin Li // Basic testcase 20*67e74705SXin Li _Complex float valid1 = { 1.0f, 2.0f }; // expected-warning {{specifying real and imaginary components is an extension}} 21*67e74705SXin Li 22*67e74705SXin Li 23*67e74705SXin Li // Struct for nesting tests 24*67e74705SXin Li struct teststruct { _Complex float x; }; 25*67e74705SXin Li 26*67e74705SXin Li 27*67e74705SXin Li // Random other valid stuff 28*67e74705SXin Li _Complex int valid2 = { 1, 2 }; // expected-warning {{complex integer}} expected-warning {{specifying real and imaginary components is an extension}} 29*67e74705SXin Li struct teststruct valid3 = { { 1.0f, 2.0f} }; // expected-warning {{specifying real and imaginary components is an extension}} 30*67e74705SXin Li _Complex float valid4[2] = { {1.0f, 1.0f}, {1.0f, 1.0f} }; // expected-warning 2 {{specifying real and imaginary components is an extension}} 31*67e74705SXin Li // FIXME: We need some sort of warning for valid5 32*67e74705SXin Li _Complex float valid5 = {1.0f, 1.0fi}; // expected-warning {{imaginary constants}} expected-warning {{specifying real and imaginary components is an extension}} 33*67e74705SXin Li 34*67e74705SXin Li 35*67e74705SXin Li // Random invalid stuff 36*67e74705SXin Li struct teststruct invalid1 = { 1, 2 }; // expected-warning {{excess elements}} 37*67e74705SXin Li _Complex float invalid2 = { 1, 2, 3 }; // expected-warning {{excess elements}} 38*67e74705SXin Li _Complex float invalid3 = {}; // expected-error {{scalar initializer cannot be empty}} expected-warning {{GNU empty initializer}} 39*67e74705SXin Li 40*67e74705SXin Li 41*67e74705SXin Li // Check incomplete array sizing 42*67e74705SXin Li _Complex float sizetest1[] = { {1.0f, 1.0f}, {1.0f, 1.0f} }; // expected-warning 2 {{specifying real and imaginary components is an extension}} 43*67e74705SXin Li _Complex float sizecheck1[(sizeof(sizetest1) == sizeof(*sizetest1)*2) ? 1 : -1]; 44*67e74705SXin Li _Complex float sizetest2[] = { 1.0f, 1.0f, {1.0f, 1.0f} }; // expected-warning {{specifying real and imaginary components is an extension}} 45*67e74705SXin Li _Complex float sizecheck2[(sizeof(sizetest2) == sizeof(*sizetest2)*3) ? 1 : -1]; 46*67e74705SXin Li 47*67e74705SXin Li // Constant-folding with init list. 48*67e74705SXin Li _Complex float x = 2 + (_Complex float) { 1, 2 }; // expected-warning {{specifying real and imaginary components is an extension}} 49