From: Manuel Nickschas <sputnick@quassel-irc.org>
Date: Mon, 15 Oct 2018 19:22:04 +0000 (+0200)
Subject: types: Add STL-compliant Hash functor for Qt types
X-Git-Tag: test-travis-01~107
X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=commitdiff_plain;h=55ed2b3b4fac69d7d4bcb62f312b1fd233626577;hp=b8db3c55a7f66a8d6ecabf9039aabceff9ae4837

types: Add STL-compliant Hash functor for Qt types

In order to use Qt types with std::unordered_set (and map), a
compatible hash function needs to be provided. Provide a generic
Hash<T> functor that just uses the qHash() function for the given
type.

This can be used as follows:
    std::unordered_set<QString, Hash<QString>> set;
---

diff --git a/src/common/types.h b/src/common/types.h
index a806c58f..0816223d 100644
--- a/src/common/types.h
+++ b/src/common/types.h
@@ -225,6 +225,16 @@ QDataStream& operator>>(QDataStream& in, T& value)
     return in;
 }
 
+// STL-compliant hash functor for Qt types
+template<typename T>
+struct Hash
+{
+    uint operator()(const T& t) const
+    {
+        return qHash(t);
+    }
+};
+
 // Exceptions
 
 /**