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Unified Diff: mojo/public/cpp/bindings/string.h

Issue 2339413004: Allow Mojo structs as map keys (Closed)
Patch Set: Remove left-over import Created 4 years, 3 months ago
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« mojo/public/cpp/bindings/map_traits_wtf_hash_map.h ('K') | « mojo/public/cpp/bindings/map_traits_wtf_hash_map.h ('k') | mojo/public/cpp/bindings/struct_ptr.h » ('j') | mojo/public/cpp/bindings/struct_ptr.h » ('J')
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Index: mojo/public/cpp/bindings/string.h
diff --git a/mojo/public/cpp/bindings/string.h b/mojo/public/cpp/bindings/string.h
index 7cfd713f66959bbaac1e17d92127039d11bf31c7..d5035792b5c556fb6546e295aeb664a23a5d79ce 100644
--- a/mojo/public/cpp/bindings/string.h
+++ b/mojo/public/cpp/bindings/string.h
@@ -7,6 +7,7 @@
#include <stddef.h>
+#include <functional>
#include <string>
#include "base/logging.h"
@@ -193,4 +194,16 @@ struct TypeConverter<String, const char*> {
} // namespace mojo
+namespace std {
+
+template <>
+struct hash<mojo::String> {
+ size_t operator()(const mojo::String& value) const {
+ // TODO(tibell): Is |value| nullable?
yzshen1 2016/09/20 23:44:40 value.get() won't fail even if |value| is null.
tibell 2016/09/21 07:10:53 Done.
+ return hash<std::string>()(value.get());
+ }
+};
+
+} // namespace std
+
#endif // MOJO_PUBLIC_CPP_BINDINGS_STRING_H_
« mojo/public/cpp/bindings/map_traits_wtf_hash_map.h ('K') | « mojo/public/cpp/bindings/map_traits_wtf_hash_map.h ('k') | mojo/public/cpp/bindings/struct_ptr.h » ('j') | mojo/public/cpp/bindings/struct_ptr.h » ('J')

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