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