| // RUN: %clang_cc1 %s -verify -fsyntax-only -pedantic |
| |
| // This file tests the clang extension which allows initializing the components |
| // of a complex number individually using an initialization list. Basically, |
| // if you have an explicit init list for a complex number that contains two |
| // initializers, this extension kicks in to turn it into component-wise |
| // initialization. |
| // |
| // This extension is useful because there isn't any way to accurately build |
| // a complex number at the moment besides setting the components with |
| // __real__ and __imag__, which is inconvenient and not usable for constants. |
| // (Of course, there are other extensions we could implement that would |
| // allow this, like some sort of __builtin_build_complex.) |
| // |
| // FIXME: It would be a good idea to have a warnings for implicit |
| // real->complex and complex->real conversions; as-is, it's way too easy |
| // to get implicit conversions when they are not intended. |
| |
| // Basic testcase |
| _Complex float valid1 = { 1.0f, 2.0f }; // expected-warning {{specifying real and imaginary components is an extension}} |
| |
| |
| // Struct for nesting tests |
| struct teststruct { _Complex float x; }; |
| |
| |
| // Random other valid stuff |
| _Complex int valid2 = { 1, 2 }; // expected-warning {{complex integer}} \ |
| // expected-warning {{specifying real and imaginary components is an extension}} |
| struct teststruct valid3 = { { 1.0f, 2.0f} }; // expected-warning {{specifying real and imaginary components is an extension}} |
| _Complex float valid4[2] = { {1.0f, 1.0f}, {1.0f, 1.0f} }; // expected-warning 2 {{specifying real and imaginary components is an extension}} |
| // FIXME: We need some sort of warning for valid5 |
| _Complex float valid5 = {1.0f, 1.0fi}; // expected-warning {{imaginary constants}} \ |
| // expected-warning {{specifying real and imaginary components is an extension}} |
| |
| |
| // Random invalid stuff |
| struct teststruct invalid1 = { 1, 2 }; // expected-warning {{excess elements}} |
| _Complex float invalid2 = { 1, 2, 3 }; // expected-warning {{specifying real and imaginary components is an extension}} \ |
| // expected-warning {{excess elements in scalar initializer}} |
| _Complex float invalid3 = {}; // expected-warning {{use of an empty initializer is a C23 extension}} |
| |
| |
| // Check incomplete array sizing |
| _Complex float sizetest1[] = { {1.0f, 1.0f}, {1.0f, 1.0f} }; // expected-warning 2 {{specifying real and imaginary components is an extension}} |
| _Complex float sizecheck1[(sizeof(sizetest1) == sizeof(*sizetest1)*2) ? 1 : -1]; |
| _Complex float sizetest2[] = { 1.0f, 1.0f, {1.0f, 1.0f} }; // expected-warning {{specifying real and imaginary components is an extension}} |
| _Complex float sizecheck2[(sizeof(sizetest2) == sizeof(*sizetest2)*3) ? 1 : -1]; |
| |
| // Constant-folding with init list. |
| _Complex float x = 2 + (_Complex float) { 1, 2 }; // expected-warning {{specifying real and imaginary components is an extension}} |
| |
| // initialization list |
| _Complex double cd = {1.0, 2.0, 3.0}; // expected-warning {{specifying real and imaginary components is an extension}} \ |
| // expected-warning {{excess elements in scalar initializer}} |
| _Complex float cf = {1.1f, 2.2f, 3.3f, 4.4f}; // expected-warning {{specifying real and imaginary components is an extension}} \ |
| // expected-warning {{excess elements in scalar initializer}} |