* [PATCH] Replace safe bool idiom with explicit operator bool
@ 2018-07-31 14:55 Jonathan Wakely
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From: Jonathan Wakely @ 2018-07-31 14:55 UTC (permalink / raw)
To: libstdc++, gcc-patches
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* include/ext/pointer.h [__cplusplus >= 201103L]
(_Pointer_adapter::operator bool): Add explicit conversion operator
to replace safe bool idiom.
Tested powerpc64le-linux, committed to trunk.
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commit 791062941cf5c4b93153bfd10d5bb9b0ac78d301
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Tue Jul 31 11:33:03 2018 +0100
Replace safe bool idiom with explicit operator bool
* include/ext/pointer.h [__cplusplus >= 201103L]
(_Pointer_adapter::operator bool): Add explicit conversion operator
to replace safe bool idiom.
diff --git a/libstdc++-v3/include/ext/pointer.h b/libstdc++-v3/include/ext/pointer.h
index 318fbb11b08..ee5c30dfa64 100644
--- a/libstdc++-v3/include/ext/pointer.h
+++ b/libstdc++-v3/include/ext/pointer.h
@@ -356,6 +356,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ return _Storage_policy::get()[__index]; }
// To allow implicit conversion to "bool", for "if (ptr)..."
+#if __cplusplus >= 201103L
+ explicit operator bool() const { return _Storage_policy::get() != 0; }
+#else
private:
typedef element_type*(_Pointer_adapter::*__unspecified_bool_type)() const;
@@ -370,6 +373,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline bool
operator!() const
{ return (_Storage_policy::get() == 0); }
+#endif
// Pointer differences
inline friend std::ptrdiff_t
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