[core] Fix performance-type-promotion-in-math-fn errors in header files

As reported by clang-tidy-8.

1 files changed, 6 insertions, 3 deletions

diff --git a/src/mbgl/renderer/possibly_evaluated_property_value.hpp b/src/mbgl/renderer/possibly_evaluated_property_value.hpp
index 466e042cbc..651c9676fb 100644
--- a/src/mbgl/renderer/possibly_evaluated_property_value.hpp
+++ b/src/mbgl/renderer/possibly_evaluated_property_value.hpp
@@ -1,10 +1,12 @@
 #pragma once
 
-#include <mbgl/style/property_expression.hpp>
 #include <mbgl/renderer/cross_faded_property_evaluator.hpp>
+#include <mbgl/style/property_expression.hpp>
 #include <mbgl/util/interpolate.hpp>
 #include <mbgl/util/variant.hpp>
 
+#include <cmath>
+
 namespace mbgl {
 
 template <class T>
@@ -110,9 +112,10 @@ public:
             [&] (const Faded<T>& constant_) { return constant_; },
             [&] (const style::PropertyExpression<T>& expression) {
                 if (!expression.isZoomConstant()) {
-                    const T min = expression.evaluate(floor(zoom), feature, availableImages, canonical, defaultValue);
+                    const T min =
+                        expression.evaluate(std::floor(zoom), feature, availableImages, canonical, defaultValue);
                     const T max =
-                        expression.evaluate(floor(zoom) + 1, feature, availableImages, canonical, defaultValue);
+                        expression.evaluate(std::floor(zoom) + 1, feature, availableImages, canonical, defaultValue);
                     return Faded<T> {min, max};
                 } else {
                     const T evaluated = expression.evaluate(feature, availableImages, defaultValue);