/// 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