[core] Fix performance-no-automatic-move (bonus)

As reported by clang-tidy-10. We don't run clang-tidy-10 yet. We
should probably consider moving the bots at some point so errors
like this won't return.

6 files changed, 10 insertions, 9 deletions

diff --git a/include/mbgl/actor/scheduler.hpp b/include/mbgl/actor/scheduler.hpp
index 1a9ba1907f..dbc1a94f47 100644
--- a/include/mbgl/actor/scheduler.hpp
+++ b/include/mbgl/actor/scheduler.hpp
@@ -90,8 +90,8 @@ protected:
     template <typename TaskFn, typename ReplyFn>
     void scheduleAndReplyValue(const TaskFn& task,
                                const ReplyFn& reply,
-                               const mapbox::base::WeakPtr<Scheduler>& replyScheduler) {
-        auto scheduled = [replyScheduler, task, reply] {
+                               mapbox::base::WeakPtr<Scheduler> replyScheduler) {
+        auto scheduled = [replyScheduler = std::move(replyScheduler), task, reply] {
             auto lock = replyScheduler.lock();
             if (!replyScheduler) return;
             auto scheduledReply = [reply, result = task()] { reply(result); };
diff --git a/include/mbgl/style/expression/let.hpp b/include/mbgl/style/expression/let.hpp
index 7c468dfeb1..a03c4b7d70 100644
--- a/include/mbgl/style/expression/let.hpp
+++ b/include/mbgl/style/expression/let.hpp
@@ -49,8 +49,8 @@ private:
 
 class Var : public Expression {
 public:
-    Var(std::string name_, const std::shared_ptr<Expression>& value_)
-        : Expression(Kind::Var, value_->getType()), name(std::move(name_)), value(value_) {}
+    Var(std::string name_, std::shared_ptr<Expression> value_)
+        : Expression(Kind::Var, value_->getType()), name(std::move(name_)), value(std::move(value_)) {}
 
     static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&);
 
diff --git a/include/mbgl/style/expression/literal.hpp b/include/mbgl/style/expression/literal.hpp
index f704a34a59..e8f0a5d9ee 100644
--- a/include/mbgl/style/expression/literal.hpp
+++ b/include/mbgl/style/expression/literal.hpp
@@ -14,7 +14,8 @@ class Literal : public Expression {
 public:
     Literal(const Value& value_) : Expression(Kind::Literal, typeOf(value_)), value(value_) {}
 
-    Literal(const type::Array& type_, std::vector<Value> value_) : Expression(Kind::Literal, type_), value(value_) {}
+    Literal(const type::Array& type_, std::vector<Value> value_)
+        : Expression(Kind::Literal, type_), value(std::move(value_)) {}
 
     EvaluationResult evaluate(const EvaluationContext&) const override {
         return value;
diff --git a/src/mbgl/layout/symbol_layout.cpp b/src/mbgl/layout/symbol_layout.cpp
index d996041ebe..109f1dffa8 100644
--- a/src/mbgl/layout/symbol_layout.cpp
+++ b/src/mbgl/layout/symbol_layout.cpp
@@ -371,7 +371,7 @@ void SymbolLayout::prepareSymbols(const GlyphMap& glyphMap,
                                     WritingModeType writingMode,
                                     SymbolAnchorType textAnchor,
                                     TextJustifyType textJustify) {
-                const Shaping result = getShaping(
+                Shaping result = getShaping(
                     /* string */ formattedText,
                     /* maxWidth: ems */
                     isPointPlacement ? layout->evaluate<TextMaxWidth>(zoom, feature, canonicalID) * util::ONE_EM : 0.0f,
diff --git a/src/mbgl/style/expression/boolean_operator.cpp b/src/mbgl/style/expression/boolean_operator.cpp
index a02c08131f..6beae6062a 100644
--- a/src/mbgl/style/expression/boolean_operator.cpp
+++ b/src/mbgl/style/expression/boolean_operator.cpp
@@ -7,7 +7,7 @@ namespace expression {
 
 EvaluationResult Any::evaluate(const EvaluationContext& params) const {
     for (const auto& input : inputs) {
-        const EvaluationResult result = input->evaluate(params);
+        EvaluationResult result = input->evaluate(params);
         if (!result) return result;
         if (result->get<bool>()) return EvaluationResult(true);
     }
@@ -35,7 +35,7 @@ std::vector<optional<Value>> Any::possibleOutputs() const {
 
 EvaluationResult All::evaluate(const EvaluationContext& params) const {
     for (const auto& input : inputs) {
-        const EvaluationResult result = input->evaluate(params);
+        EvaluationResult result = input->evaluate(params);
         if (!result) return result;
         if (!result->get<bool>()) return EvaluationResult(false);
     }
diff --git a/src/mbgl/style/expression/length.cpp b/src/mbgl/style/expression/length.cpp
index f1b58d7952..340a2debea 100644
--- a/src/mbgl/style/expression/length.cpp
+++ b/src/mbgl/style/expression/length.cpp
@@ -12,7 +12,7 @@ Length::Length(std::unique_ptr<Expression> input_)
 }
 
 EvaluationResult Length::evaluate(const EvaluationContext& params) const {
-    const EvaluationResult value = input->evaluate(params);
+    EvaluationResult value = input->evaluate(params);
     if (!value) return value;
     return value->match(
         [] (const std::string& s) {