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// RUN: %clang_cc1 -triple x86_64-apple-darwin -verify -fsyntax-only %s -Wdouble-promotion
using LongDouble = long double;
double ReturnDoubleFromFloatWithExplicitCast(float f) {
return static_cast<double>(f);
}
long double ReturnLongDoubleFromFloatWithExplicitCast(float f) {
return static_cast<long double>(f);
}
long double ReturnLongDoubleFromDoubleWithExplicitCast(double d) {
return static_cast<long double>(d);
}
double ReturnDoubleFromFloatWithExplicitListInitialization(float f) {
return double{f};
}
long double ReturnLongDoubleFromFloatWithExplicitListInitialization(float f) {
return LongDouble{f};
}
long double ReturnLongDoubleFromDoubleWithExplicitListInitialization(double d) {
return LongDouble{d};
}
double ReturnDoubleFromFloatWithFunctionStyleCast(float f) {
return double(f);
}
long double ReturnLongDoubleFromFloatWithFunctionStyleCast(float f) {
return LongDouble(f);
}
long double ReturnLongDoubleFromDoubleWithFunctionStyleCast(double d) {
return LongDouble(d);
}
void InitializationWithParens(float f, double d) {
{
double d(f); // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'double'}}
long double ld0(f); // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'long double'}}
long double ld1(d); // expected-warning{{implicit conversion increases floating-point precision: 'double' to 'long double'}}
}
{
double d(static_cast<double>(f));
long double ld0(static_cast<long double>(f));
long double ld1(static_cast<long double>(d));
}
{
double d(double{f});
long double ld0(LongDouble{f});
long double ld1(LongDouble{d});
}
{
double d((double(f)));
long double ld0((LongDouble(f)));
long double ld1((LongDouble(d)));
}
}
void InitializationWithBraces(float f, double d) {
{
double d{f}; // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'double'}}
long double ld0{f}; // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'long double'}}
long double ld1{d}; // expected-warning{{implicit conversion increases floating-point precision: 'double' to 'long double'}}
}
{
double d{static_cast<double>(f)};
long double ld0{static_cast<long double>(f)};
long double ld1{static_cast<long double>(d)};
}
{
double d{double{f}};
long double ld0{LongDouble{f}};
long double ld1{LongDouble{d}};
}
{
double d{double(f)};
long double ld0{LongDouble(f)};
long double ld1{LongDouble(d)};
}
}
void Assignment(float f, double d, long double ld) {
d = static_cast<double>(f);
ld = static_cast<long double>(f);
ld = static_cast<long double>(d);
d = double{f};
ld = LongDouble{f};
ld = LongDouble{d};
d = double(f);
ld = LongDouble(f);
ld = LongDouble(d);
}
void AssignmentWithExtraParens(float f, double d, long double ld) {
d = static_cast<double>((f));
ld = static_cast<long double>((f));
ld = static_cast<long double>((d));
d = double{(f)};
ld = LongDouble{(f)};
ld = LongDouble{(d)};
d = double((f));
ld = LongDouble((f));
ld = LongDouble((d));
}
void AssignmentWithExtraBraces(float f, double d, long double ld) {
d = double{{f}}; // expected-warning{{too many braces around scalar initializer}}
ld = LongDouble{{f}}; // expected-warning{{too many braces around scalar initializer}}
ld = LongDouble{{d}}; // expected-warning{{too many braces around scalar initializer}}
}
extern void DoubleParameter(double);
extern void LongDoubleParameter(long double);
void ArgumentPassing(float f, double d) {
DoubleParameter(static_cast<double>(f));
LongDoubleParameter(static_cast<long double>(f));
LongDoubleParameter(static_cast<long double>(d));
DoubleParameter(double{f});
LongDoubleParameter(LongDouble{f});
LongDoubleParameter(LongDouble{d});
DoubleParameter(double(f));
LongDoubleParameter(LongDouble(f));
LongDoubleParameter(LongDouble(d));
}
void BinaryOperator(float f, double d, long double ld) {
f = static_cast<double>(f) * d;
f = d * static_cast<double>(f);
f = static_cast<long double>(f) * ld;
f = ld * static_cast<long double>(f);
d = static_cast<long double>(d) * ld;
d = ld * static_cast<long double>(d);
f = double{f} * d;
f = d * double{f};
f = LongDouble{f} * ld;
f = ld * LongDouble{f};
d = LongDouble{d} * ld;
d = ld * LongDouble{d};
f = double(f) * d;
f = d * double(f);
f = LongDouble(f) * ld;
f = ld * LongDouble(f);
d = LongDouble(d) * ld;
d = ld * LongDouble(d);
}
void MultiplicationAssignment(float f, double d, long double ld) {
d *= static_cast<double>(f);
ld *= static_cast<long double>(f);
ld *= static_cast<long double>(d);
d *= double{f};
ld *= LongDouble{f};
ld *= LongDouble{d};
d *= double(f);
ld *= LongDouble(f);
ld *= LongDouble(d);
}
struct ConstructWithDouble {
ConstructWithDouble(double);
};
struct ConstructWithLongDouble {
ConstructWithLongDouble(long double);
};
void Construct(float f, double d) {
ConstructWithDouble{f}; // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'double'}}
ConstructWithLongDouble{f}; // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'long double'}}
ConstructWithLongDouble{d}; // expected-warning{{implicit conversion increases floating-point precision: 'double' to 'long double'}}
ConstructWithDouble{static_cast<double>(f)};
ConstructWithLongDouble{static_cast<long double>(f)};
ConstructWithLongDouble{static_cast<long double>(d)};
ConstructWithDouble{double{f}};
ConstructWithLongDouble{LongDouble{f}};
ConstructWithLongDouble{LongDouble{d}};
ConstructWithDouble{double(f)};
ConstructWithLongDouble{LongDouble(f)};
ConstructWithLongDouble{LongDouble(d)};
}
template <class T> T ReturnTFromFloat(float f) {
return f; // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'double'}} \
// expected-warning{{implicit conversion increases floating-point precision: 'float' to 'long double'}}
}
template <class T> T ReturnTFromDouble(double d) {
return d; // expected-warning{{implicit conversion increases floating-point precision: 'double' to 'long double'}}
}
template <class T> T ReturnTFromFloatWithStaticCast(float f) {
return static_cast<T>(f);
}
template <class T> T ReturnTFromDoubleWithStaticCast(double d) {
return static_cast<T>(d);
}
template <class T> T ReturnTFromFloatWithExplicitListInitialization(float f) {
return T{f};
}
template <class T> T ReturnTFromDoubleWithExplicitListInitialization(double d) {
return T{d};
}
template <class T> T ReturnTFromFloatWithFunctionStyleCast(float f) {
return T(f);
}
template <class T> T ReturnTFromDoubleWithFunctionStyleCast(double d) {
return T(d);
}
void TestTemplate(float f, double d) {
ReturnTFromFloat<double>(f); // expected-note{{in instantiation of function template specialization 'ReturnTFromFloat<double>' requested here}}
ReturnTFromFloat<long double>(f); // expected-note{{in instantiation of function template specialization 'ReturnTFromFloat<long double>' requested here}}
ReturnTFromDouble<long double>(d); // expected-note{{in instantiation of function template specialization 'ReturnTFromDouble<long double>' requested here}}
ReturnTFromFloatWithStaticCast<double>(f);
ReturnTFromFloatWithStaticCast<long double>(f);
ReturnTFromDoubleWithStaticCast<long double>(d);
ReturnTFromFloatWithExplicitListInitialization<double>(f);
ReturnTFromFloatWithExplicitListInitialization<long double>(f);
ReturnTFromDoubleWithExplicitListInitialization<long double>(d);
ReturnTFromFloatWithFunctionStyleCast<double>(f);
ReturnTFromFloatWithFunctionStyleCast<long double>(f);
ReturnTFromDoubleWithFunctionStyleCast<long double>(d);
}
struct MemberInitializerListParens {
double m_d;
long double m_ld0;
long double m_ld1;
MemberInitializerListParens(float f, double d):
m_d(f), // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'double'}}
m_ld0(f), // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'long double'}}
m_ld1(d) // expected-warning{{implicit conversion increases floating-point precision: 'double' to 'long double'}}
{}
};
struct MemberInitializerListBraces {
double m_d;
long double m_ld0;
long double m_ld1;
MemberInitializerListBraces(float f, double d):
m_d{f}, // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'double'}}
m_ld0{f}, // expected-warning{{implicit conversion increases floating-point precision: 'float' to 'long double'}}
m_ld1{d} // expected-warning{{implicit conversion increases floating-point precision: 'double' to 'long double'}}
{}
};
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