build

Initial support for std::string_view #235

Job	Run time
windows (Win32, standard)	1m 20s
ubuntu (g++, standard)	1m 10s
windows (Win32, PUGIXML_WCHAR_MODE)	1m 56s
windows (Win32, PUGIXML_COMPACT)	1m 54s
ubuntu (g++, PUGIXML_WCHAR_MODE)	1m 17s
ubuntu (g++, PUGIXML_COMPACT)	1m 14s
windows (Win32, PUGIXML_NO_EXCEPTIONS)	1m 13s
ubuntu (g++, PUGIXML_NO_EXCEPTIONS)	1m 9s
ubuntu (g++, PUGIXML_STRING_VIEW)	1m 12s
windows (Win32, PUGIXML_STRING_VIEW)	1m 56s
ubuntu (clang++, standard)	49s
windows (x64, standard)	1m 41s
ubuntu (clang++, PUGIXML_WCHAR_MODE)	51s
windows (x64, PUGIXML_WCHAR_MODE)	1m 26s
windows (x64, PUGIXML_COMPACT)	1m 41s
ubuntu (clang++, PUGIXML_COMPACT)	56s
windows (x64, PUGIXML_NO_EXCEPTIONS)	1m 48s
ubuntu (clang++, PUGIXML_NO_EXCEPTIONS)	49s
windows (x64, PUGIXML_STRING_VIEW)	1m 18s
ubuntu (clang++, PUGIXML_STRING_VIEW)	55s
macos (clang++, standard)	1m 8s
macos (clang++, PUGIXML_WCHAR_MODE)	1m 22s
macos (clang++, PUGIXML_COMPACT)	54s
macos (clang++, PUGIXML_NO_EXCEPTIONS)	52s
macos (clang++, PUGIXML_STRING_VIEW)	51s
	31m 42s

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