[core] Fix google-explicit-constructor errors

As reported by clang-tidy-8.

2 files changed, 4 insertions, 5 deletions

diff --git a/platform/glfw/glfw_gl_backend.cpp b/platform/glfw/glfw_gl_backend.cpp
index 0a949016ed..6eb58d4fa6 100644
--- a/platform/glfw/glfw_gl_backend.cpp
+++ b/platform/glfw/glfw_gl_backend.cpp
@@ -7,8 +7,7 @@
 
 class GLFWGLRenderableResource final : public mbgl::gl::RenderableResource {
 public:
-    GLFWGLRenderableResource(GLFWGLBackend& backend_) : backend(backend_) {
-    }
+    explicit GLFWGLRenderableResource(GLFWGLBackend& backend_) : backend(backend_) {}
 
     void bind() override {
         backend.setFramebufferBinding(0);
diff --git a/platform/glfw/test_writer.cpp b/platform/glfw/test_writer.cpp
index 9fe06cc2ca..71dae3ef5d 100644
--- a/platform/glfw/test_writer.cpp
+++ b/platform/glfw/test_writer.cpp
@@ -20,7 +20,7 @@ public:
 
 class SetCamera final : public TestOperationSerializer {
 public:
-    SetCamera(mbgl::CameraOptions camera_) : camera(std::move(camera_)) {}
+    explicit SetCamera(mbgl::CameraOptions camera_) : camera(std::move(camera_)) {}
 
     void serialize(Writer& writer) const override {
         if (camera.zoom) {
@@ -59,7 +59,7 @@ private:
 
 class SetStyle final : public TestOperationSerializer {
 public:
-    SetStyle(const mbgl::style::Style& style) : url(style.getURL()) {}
+    explicit SetStyle(const mbgl::style::Style& style) : url(style.getURL()) {}
 
     void serialize(Writer& writer) const override {
         writer.StartArray();
@@ -74,7 +74,7 @@ private:
 
 class SetInitialSize final : public TestOperationSerializer {
 public:
-    SetInitialSize(const mbgl::Size& size) : width(size.width), height(size.height) {}
+    explicit SetInitialSize(const mbgl::Size& size) : width(size.width), height(size.height) {}
 
     void serialize(Writer& writer) const override {
         writer.Key("width");