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Don't pass in a null pointer to std::string's ctor, an empty string

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ref should produce an empty std::string.  This fixes PR7879.

llvm-svn: 111332
This commit is contained in:
Chris Lattner 2010-08-18 00:11:25 +00:00
parent 982a804b20
commit c27b10f80d
1 changed files with 4 additions and 1 deletions
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5
include/llvm/ADT/StringRef.h
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@ -149,7 +149,10 @@ namespace llvm {
unsigned edit_distance(StringRef Other, bool AllowReplacements = true);
/// str - Get the contents as an std::string.
std::string str() const { return std::string(Data, Length); }
std::string str() const {
if (Data == 0) return "";
return std::string(Data, Length);
}
/// @}
/// @name Operator Overloads