Replace String comparisons with "", String() to is_empty()

Also:
- Adds two stress tests to test_string.h
- Changes to .empty() on std::strings

8 files changed, 13 insertions, 13 deletions

diff --git a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
index 768bd1de9d..71753f9694 100644
--- a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
+++ b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
@@ -44,7 +44,7 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_screen_texture = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
index e6d9a60f94..8807ebf134 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
@@ -47,7 +47,7 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_screen_texture = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
index d013099cce..2ff7f27d33 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
@@ -1953,7 +1953,7 @@ void RendererCanvasRenderRD::ShaderData::set_code(const String &p_code) {
 	uses_sdf = false;
 	uses_time = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_compositor_rd.cpp b/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
index 522a8e8112..d310becd1e 100644
--- a/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_compositor_rd.cpp
@@ -240,7 +240,7 @@ RendererCompositorRD *RendererCompositorRD::singleton = nullptr;
 RendererCompositorRD::RendererCompositorRD() {
 	{
 		String shader_cache_dir = Engine::get_singleton()->get_shader_cache_path();
-		if (shader_cache_dir == String()) {
+		if (shader_cache_dir.is_empty()) {
 			shader_cache_dir = "user://";
 		}
 		DirAccessRef da = DirAccess::open(shader_cache_dir);
@@ -261,7 +261,7 @@ RendererCompositorRD::RendererCompositorRD() {
 					shader_cache_dir = String(); //disable only if not editor
 				}
 
-				if (shader_cache_dir != String()) {
+				if (!shader_cache_dir.is_empty()) {
 					bool compress = GLOBAL_GET("rendering/shader_compiler/shader_cache/compress");
 					bool use_zstd = GLOBAL_GET("rendering/shader_compiler/shader_cache/use_zstd_compression");
 					bool strip_debug = GLOBAL_GET("rendering/shader_compiler/shader_cache/strip_debug");
diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
index ae8d91a73b..b3d3b82b72 100644
--- a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
@@ -3581,7 +3581,7 @@ void RendererSceneRenderRD::FogShaderData::set_code(const String &p_code) {
 	ubo_size = 0;
 	uniforms.clear();
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
index a9c39fb937..f595edb225 100644
--- a/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
@@ -46,7 +46,7 @@ void RendererSceneSkyRD::SkyShaderData::set_code(const String &p_code) {
 	ubo_size = 0;
 	uniforms.clear();
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.cpp b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
index f8d0aad4fa..79728169ae 100644
--- a/servers/rendering/renderer_rd/renderer_storage_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
@@ -2861,7 +2861,7 @@ void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Vari
 				}
 			}
 #ifdef TOOLS_ENABLED
-			if (roughness_detect_texture && normal_detect_texture && normal_detect_texture->path != String()) {
+			if (roughness_detect_texture && normal_detect_texture && !normal_detect_texture->path.is_empty()) {
 				roughness_detect_texture->detect_roughness_callback(roughness_detect_texture->detect_roughness_callback_ud, normal_detect_texture->path, roughness_channel);
 			}
 #endif
@@ -2901,7 +2901,7 @@ void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Vari
 					rd_texture = singleton->texture_rd_get_default(DEFAULT_RD_TEXTURE_WHITE);
 				}
 #ifdef TOOLS_ENABLED
-				if (roughness_detect_texture && normal_detect_texture && normal_detect_texture->path != String()) {
+				if (roughness_detect_texture && normal_detect_texture && !normal_detect_texture->path.is_empty()) {
 					roughness_detect_texture->detect_roughness_callback(roughness_detect_texture->detect_roughness_callback_ud, normal_detect_texture->path, roughness_channel);
 				}
 #endif
@@ -5820,7 +5820,7 @@ void RendererStorageRD::ParticlesShaderData::set_code(const String &p_code) {
 	uniforms.clear();
 	uses_collision = false;
 
-	if (code == String()) {
+	if (code.is_empty()) {
 		return; //just invalid, but no error
 	}
 
diff --git a/servers/rendering/renderer_rd/shader_rd.cpp b/servers/rendering/renderer_rd/shader_rd.cpp
index 2568090918..438e78ba8c 100644
--- a/servers/rendering/renderer_rd/shader_rd.cpp
+++ b/servers/rendering/renderer_rd/shader_rd.cpp
@@ -79,7 +79,7 @@ void ShaderRD::_add_stage(const char *p_code, StageType p_stage_type) {
 		}
 
 		if (push_chunk) {
-			if (text != String()) {
+			if (!text.is_empty()) {
 				StageTemplate::Chunk text_chunk;
 				text_chunk.type = StageTemplate::Chunk::TYPE_TEXT;
 				text_chunk.text = text.utf8();
@@ -90,7 +90,7 @@ void ShaderRD::_add_stage(const char *p_code, StageType p_stage_type) {
 		}
 	}
 
-	if (text != String()) {
+	if (!text.is_empty()) {
 		StageTemplate::Chunk text_chunk;
 		text_chunk.type = StageTemplate::Chunk::TYPE_TEXT;
 		text_chunk.text = text.utf8();
@@ -638,7 +638,7 @@ void ShaderRD::initialize(const Vector<String> &p_variant_defines, const String
 		variants_enabled.push_back(true);
 	}
 
-	if (shader_cache_dir != String()) {
+	if (!shader_cache_dir.is_empty()) {
 		StringBuilder hash_build;
 
 		hash_build.append("[base_hash]");