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Allow StringRef to be constructed from a null pointer.

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Differential Revision: https://reviews.llvm.org/D24904

llvm-svn: 282433
This commit is contained in:
Zachary Turner 2016-09-26 20:08:05 +00:00
parent 2a4049ccf6
commit 7d0e3e88cb
1 changed files with 4 additions and 4 deletions
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8
include/llvm/ADT/StringRef.h
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@ -73,14 +73,14 @@ namespace llvm {
/// Construct an empty string ref.
/*implicit*/ StringRef() : Data(nullptr), Length(0) {}
/// Disable conversion from nullptr. This prevents things like
/// if (S == nullptr)
StringRef(std::nullptr_t) = delete;
/// Construct a string ref from a cstring.
LLVM_ATTRIBUTE_ALWAYS_INLINE
/*implicit*/ StringRef(const char *Str)
: Data(Str) {
assert(Str && "StringRef cannot be built from a NULL argument");
Length = ::strlen(Str); // invoking strlen(NULL) is undefined behavior
}
: Data(Str), Length(Str ? ::strlen(Str) : 0) {}
/// Construct a string ref from a pointer and length.
LLVM_ATTRIBUTE_ALWAYS_INLINE