From cfa8c2a41e8a585834e4d04d56ff7eec0d57f608 Mon Sep 17 00:00:00 2001
From: Paul Cristian Sarbu <paul.cristian.sarbu@huawei.com>
Date: Tue, 30 Jan 2024 17:50:03 +0100
Subject: async maps: Create utility library to handle cycle detection

---
 src/buildtool/build_engine/base_maps/expression_map.hpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/buildtool/build_engine/base_maps/expression_map.hpp')

diff --git a/src/buildtool/build_engine/base_maps/expression_map.hpp b/src/buildtool/build_engine/base_maps/expression_map.hpp
index 5d08b78b..3a72c109 100644
--- a/src/buildtool/build_engine/base_maps/expression_map.hpp
+++ b/src/buildtool/build_engine/base_maps/expression_map.hpp
@@ -15,6 +15,7 @@
 #ifndef INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_BASE_MAPS_EXPRESSION_MAP_HPP
 #define INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_BASE_MAPS_EXPRESSION_MAP_HPP
 
+#include <functional>
 #include <memory>
 #include <string>
 
@@ -43,6 +44,10 @@ auto CreateExpressionMap(gsl::not_null<ExpressionFileMap*> const& expr_file_map,
                          gsl::not_null<RepositoryConfig*> const& repo_config,
                          std::size_t jobs = 0) -> ExpressionFunctionMap;
 
+// use explicit cast to std::function to allow template deduction when used
+static const std::function<std::string(EntityName const&)> kEntityNamePrinter =
+    [](EntityName const& x) -> std::string { return x.ToString(); };
+
 }  // namespace BuildMaps::Base
 
 #endif  // INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_BASE_MAPS_EXPRESSION_MAP_HPP
-- 
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