58 lines · c
1// RUN: %clang_cc1 %s -verify -fsyntax-only -pedantic2 3// This file tests the clang extension which allows initializing the components4// of a complex number individually using an initialization list. Basically,5// if you have an explicit init list for a complex number that contains two6// initializers, this extension kicks in to turn it into component-wise7// initialization.8//9// This extension is useful because there isn't any way to accurately build10// a complex number at the moment besides setting the components with11// __real__ and __imag__, which is inconvenient and not usable for constants.12// (Of course, there are other extensions we could implement that would13// allow this, like some sort of __builtin_build_complex.)14//15// FIXME: It would be a good idea to have a warnings for implicit16// real->complex and complex->real conversions; as-is, it's way too easy17// to get implicit conversions when they are not intended.18 19// Basic testcase20_Complex float valid1 = { 1.0f, 2.0f }; // expected-warning {{specifying real and imaginary components is an extension}}21 22 23// Struct for nesting tests24struct teststruct { _Complex float x; };25 26 27// Random other valid stuff28_Complex int valid2 = { 1, 2 }; // expected-warning {{complex integer}} \29 // expected-warning {{specifying real and imaginary components is an extension}}30struct teststruct valid3 = { { 1.0f, 2.0f} }; // expected-warning {{specifying real and imaginary components is an extension}}31_Complex float valid4[2] = { {1.0f, 1.0f}, {1.0f, 1.0f} }; // expected-warning 2 {{specifying real and imaginary components is an extension}}32// FIXME: We need some sort of warning for valid533_Complex float valid5 = {1.0f, 1.0fi}; // expected-warning {{imaginary constants}} \34 // expected-warning {{specifying real and imaginary components is an extension}}35 36 37// Random invalid stuff38struct teststruct invalid1 = { 1, 2 }; // expected-warning {{excess elements}}39_Complex float invalid2 = { 1, 2, 3 }; // expected-warning {{specifying real and imaginary components is an extension}} \40 // expected-warning {{excess elements in scalar initializer}}41_Complex float invalid3 = {}; // expected-warning {{use of an empty initializer is a C23 extension}}42 43 44// Check incomplete array sizing45_Complex float sizetest1[] = { {1.0f, 1.0f}, {1.0f, 1.0f} }; // expected-warning 2 {{specifying real and imaginary components is an extension}}46_Complex float sizecheck1[(sizeof(sizetest1) == sizeof(*sizetest1)*2) ? 1 : -1];47_Complex float sizetest2[] = { 1.0f, 1.0f, {1.0f, 1.0f} }; // expected-warning {{specifying real and imaginary components is an extension}}48_Complex float sizecheck2[(sizeof(sizetest2) == sizeof(*sizetest2)*3) ? 1 : -1];49 50// Constant-folding with init list.51_Complex float x = 2 + (_Complex float) { 1, 2 }; // expected-warning {{specifying real and imaginary components is an extension}}52 53// initialization list54_Complex double cd = {1.0, 2.0, 3.0}; // expected-warning {{specifying real and imaginary components is an extension}} \55 // expected-warning {{excess elements in scalar initializer}}56_Complex float cf = {1.1f, 2.2f, 3.3f, 4.4f}; // expected-warning {{specifying real and imaginary components is an extension}} \57 // expected-warning {{excess elements in scalar initializer}}58