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[Clang] Never consider conversion from single-element braced-init-list perfect #138307
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Original file line number | Diff line number | Diff line change |
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@@ -360,6 +360,13 @@ class Sema; | |
LLVM_PREFERRED_TYPE(bool) | ||
unsigned ObjCLifetimeConversionBinding : 1; | ||
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/// Whether the source expression was originally a single element | ||
/// braced-init-list. Such a conversion is not a perfect match, | ||
/// as we prefer a std::list_initializer constructor over an exact match | ||
/// constructor. | ||
LLVM_PREFERRED_TYPE(bool) | ||
unsigned FromBracedInitList : 1; | ||
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/// FromType - The type that this conversion is converting | ||
/// from. This is an opaque pointer that can be translated into a | ||
/// QualType. | ||
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@@ -412,6 +419,12 @@ class Sema; | |
bool isPerfect(const ASTContext &C) const { | ||
if (!isIdentityConversion()) | ||
return false; | ||
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// We might prefer a std::initializer constructor, | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more.
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Oups |
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// so this sequence cannot be perfect | ||
if (FromBracedInitList) | ||
return false; | ||
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// If we are not performing a reference binding, we can skip comparing | ||
// the types, which has a noticeable performance impact. | ||
if (!ReferenceBinding) { | ||
|
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std::initializer_list
:)