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Add SMLoc::isValid method.
- To support using SMLoc as a sentinel. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74474 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -30,6 +30,8 @@ public:
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SMLoc() : Ptr(0) {}
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SMLoc(const SMLoc &RHS) : Ptr(RHS.Ptr) {}
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bool isValid() const { return Ptr != 0; }
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bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; }
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bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; }
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