From a14af9460b55c5b178b0becfd95c0306cbc10e5c Mon Sep 17 00:00:00 2001
From: Christoph Lehmann <christoph.lehmann@ufz.de>
Date: Wed, 11 May 2016 17:01:35 -0400
Subject: [PATCH] [BL] added further unique insertion function
---
BaseLib/uniqueInsert.h | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/BaseLib/uniqueInsert.h b/BaseLib/uniqueInsert.h
index 5bbdbf7fe37..047509e9e72 100644
--- a/BaseLib/uniqueInsert.h
+++ b/BaseLib/uniqueInsert.h
@@ -44,6 +44,31 @@ void insertIfKeyUniqueElseError(
}
}
+//! Inserts the given \c key with the given \c value into the \c map if neither an entry
+//! with the given \c key nor an entry with the given \c value already exists;
+//! otherwise an \c error_message is printed and the program is aborted.
+template<typename Map, typename Key, typename Value>
+void insertIfKeyValueUniqueElseError(
+ Map& map, Key const& key, Value&& value,
+ std::string const& error_message)
+{
+ auto value_compare = [&value](typename Map::value_type const& elem) {
+ return value == elem.second;
+ };
+
+ if (std::find_if(map.cbegin(), map.cend(), value_compare) != map.cend())
+ {
+ ERR("%s Value `%s' already exists.", error_message.c_str(), tostring(value).c_str());
+ std::abort();
+ }
+
+ auto const inserted = map.emplace(key, std::forward<Value>(value));
+ if (!inserted.second) { // insertion failed, i.e., key already exists
+ ERR("%s Key `%s' already exists.", error_message.c_str(), tostring(key).c_str());
+ std::abort();
+ }
+}
+
//! Returns the value of \c key from the given \c map if such an entry exists;
//! otherwise an \c error_message is printed and the program is aborted.
//! Cf. also the const overload below.
--
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