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Fix -Wimplicit-fallthrough warnings from GCC 8

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Adds `FALLTHROUGH` macro to specify when a fallthrough is intentional.
Can be replaced by `[[fallthrough]]` if/when we switch to C++17.

The warning is now enabled by default for GCC on `extra` warnings level
(part of GCC's `-Wextra`). It's not enabled in Clang's `-Wextra` yet,
but we could enable it manually once we switch to C++11. There's no
equivalent feature in MSVC for now.

Fixes #26135.
This commit is contained in:
Rémi Verschelde 2019-04-05 14:06:16 +02:00
parent e4a96164b6
commit fc370b3feb
18 changed files with 82 additions and 67 deletions
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7
SConstruct
View File

@ -346,13 +346,14 @@ if selected_platform in platform_list:
version = methods.get_compiler_version(env)
if version != None and version[0] >= '7':
shadow_local_warning = ['-Wshadow-local']
if (env["warnings"] == 'extra'):
# FIXME: enable -Wimplicit-fallthrough once #26135 is fixed
# FIXME: enable -Wclobbered once #26351 is fixed
env.Append(CCFLAGS=['-Wall', '-Wextra', '-Wno-implicit-fallthrough', '-Wno-unused-parameter'] + all_plus_warnings + shadow_local_warning)
# Note: enable -Wimplicit-fallthrough for Clang (already part of -Wextra for GCC)
# once we switch to C++11 or later (necessary for our FALLTHROUGH macro).
env.Append(CCFLAGS=['-Wall', '-Wextra', '-Wno-unused-parameter'] + all_plus_warnings + shadow_local_warning)
if methods.using_gcc(env):
env['CCFLAGS'] += ['-Wno-clobbered']
elif (env["warnings"] == 'all'):
env.Append(CCFLAGS=['-Wall'] + shadow_local_warning)
elif (env["warnings"] == 'moderate'):

3
core/io/multiplayer_api.cpp
View File

@ -46,7 +46,8 @@ _FORCE_INLINE_ bool _should_call_local(MultiplayerAPI::RPCMode mode, bool is_mas
case MultiplayerAPI::RPC_MODE_MASTERSYNC: {
if (is_master)
r_skip_rpc = true; // I am the master, so skip remote call.
} // Do not break, fall over to other sync.
FALLTHROUGH;
}
case MultiplayerAPI::RPC_MODE_REMOTESYNC:
case MultiplayerAPI::RPC_MODE_PUPPETSYNC: {
// Call it, sync always results in a local call.

23
core/typedefs.h
View File

@ -331,7 +331,28 @@ struct _GlobalLock {
/** This is needed due to a strange OpenGL API that expects a pointer
* type for an argument that is actually an offset.
*/
#define CAST_INT_TO_UCHAR_PTR(ptr) ((uint8_t *)(uintptr_t)(ptr))
/** Hint for compilers that this fallthrough in a switch is intentional.
* Can be replaced by [[fallthrough]] annotation if we move to C++17.
* Including conditional support for it for people who set -std=c++17
* themselves.
* Requires a trailing semicolon when used.
*/
#if __cplusplus >= 201703L
#define FALLTHROUGH [[fallthrough]]
#elif defined(__GNUC__) && __GNUC__ >= 7
#define FALLTHROUGH __attribute__((fallthrough))
#elif defined(__llvm__) && __cplusplus >= 201103L && defined(__has_feature)
#if __has_feature(cxx_attributes) && defined(__has_warning)
#if __has_warning("-Wimplicit-fallthrough")
#define FALLTHROUGH [[clang::fallthrough]]
#endif
#endif
#endif
#ifndef FALLTHROUGH
#define FALLTHROUGH
#endif
#endif // TYPEDEFS_H

7
editor/editor_node.cpp
View File

@ -1900,7 +1900,8 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
break;
}
} // fallthrough
FALLTHROUGH;
}
case SCENE_TAB_CLOSE:
case FILE_SAVE_SCENE: {
@ -1919,8 +1920,8 @@ void EditorNode::_menu_option_confirm(int p_option, bool p_confirmed) {
break;
}
// fallthrough to save_as
};
FALLTHROUGH;
}
case FILE_SAVE_AS_SCENE: {
int scene_idx = (p_option == FILE_SAVE_SCENE || p_option == FILE_SAVE_AS_SCENE) ? -1 : tab_closing;

5
editor/plugins/canvas_item_editor_plugin.cpp
View File

@ -2261,6 +2261,7 @@ void CanvasItemEditor::_gui_input_viewport(const Ref<InputEvent> &p_event) {
break;
case DRAG_PAN:
c = CURSOR_DRAG;
break;
default:
break;
}
@ -2597,6 +2598,7 @@ void CanvasItemEditor::_draw_control_helpers(Control *control) {
case DRAG_TOP_LEFT:
case DRAG_BOTTOM_LEFT:
_draw_margin_at_position(control->get_size().width, parent_transform.xform(Vector2((node_pos_in_parent[0] + node_pos_in_parent[2]) / 2, node_pos_in_parent[3])) + Vector2(0, 5), MARGIN_BOTTOM);
FALLTHROUGH;
case DRAG_MOVE:
start = Vector2(node_pos_in_parent[0], Math::lerp(node_pos_in_parent[1], node_pos_in_parent[3], ratio));
end = start - Vector2(control->get_margin(MARGIN_LEFT), 0);
@ -2611,6 +2613,7 @@ void CanvasItemEditor::_draw_control_helpers(Control *control) {
case DRAG_TOP_RIGHT:
case DRAG_BOTTOM_RIGHT:
_draw_margin_at_position(control->get_size().width, parent_transform.xform(Vector2((node_pos_in_parent[0] + node_pos_in_parent[2]) / 2, node_pos_in_parent[3])) + Vector2(0, 5), MARGIN_BOTTOM);
FALLTHROUGH;
case DRAG_MOVE:
start = Vector2(node_pos_in_parent[2], Math::lerp(node_pos_in_parent[3], node_pos_in_parent[1], ratio));
end = start - Vector2(control->get_margin(MARGIN_RIGHT), 0);
@ -2625,6 +2628,7 @@ void CanvasItemEditor::_draw_control_helpers(Control *control) {
case DRAG_TOP_LEFT:
case DRAG_TOP_RIGHT:
_draw_margin_at_position(control->get_size().height, parent_transform.xform(Vector2(node_pos_in_parent[2], (node_pos_in_parent[1] + node_pos_in_parent[3]) / 2)) + Vector2(5, 0), MARGIN_RIGHT);
FALLTHROUGH;
case DRAG_MOVE:
start = Vector2(Math::lerp(node_pos_in_parent[0], node_pos_in_parent[2], ratio), node_pos_in_parent[1]);
end = start - Vector2(0, control->get_margin(MARGIN_TOP));
@ -2639,6 +2643,7 @@ void CanvasItemEditor::_draw_control_helpers(Control *control) {
case DRAG_BOTTOM_LEFT:
case DRAG_BOTTOM_RIGHT:
_draw_margin_at_position(control->get_size().height, parent_transform.xform(Vector2(node_pos_in_parent[2], (node_pos_in_parent[1] + node_pos_in_parent[3]) / 2) + Vector2(5, 0)), MARGIN_RIGHT);
FALLTHROUGH;
case DRAG_MOVE:
start = Vector2(Math::lerp(node_pos_in_parent[2], node_pos_in_parent[0], ratio), node_pos_in_parent[3]);
end = start - Vector2(0, control->get_margin(MARGIN_BOTTOM));

3
editor/plugins/script_editor_plugin.cpp
View File

@ -849,8 +849,7 @@ void ScriptEditor::_file_dialog_action(String p_file) {
}
file->close();
memdelete(file);
// fallthrough to open the file.
FALLTHROUGH;
}
case FILE_OPEN: {

2
editor/plugins/script_text_editor.cpp
View File

@ -910,7 +910,7 @@ void ScriptTextEditor::_edit_option(int p_op) {
tx->set_line_as_breakpoint(line, dobreak);
ScriptEditor::get_singleton()->get_debugger()->set_breakpoint(script->get_path(), line + 1, dobreak);
}
}
} break;
case DEBUG_GOTO_NEXT_BREAKPOINT: {
List<int> bpoints;

2
editor/project_manager.cpp
View File

@ -1136,7 +1136,7 @@ void ProjectManager::_unhandled_input(const Ref<InputEvent> &p_ev) {
break;
}
// else fallthrough to key_down
FALLTHROUGH;
}
case KEY_DOWN: {

1
main/tests/test_gdscript.cpp
View File

@ -127,6 +127,7 @@ static String _parser_expr(const GDScriptParser::Node *p_expr) {
case GDScriptParser::OperatorNode::OP_PARENT_CALL:
txt += ".";
FALLTHROUGH;
case GDScriptParser::OperatorNode::OP_CALL: {
ERR_FAIL_COND_V(c_node->arguments.size() < 1, "");

18
modules/gdscript/gdscript_parser.cpp
View File

@ -777,7 +777,8 @@ GDScriptParser::Node *GDScriptParser::_parse_expression(Node *p_parent, bool p_s
}
_add_warning(GDScriptWarning::UNASSIGNED_VARIABLE_OP_ASSIGN, -1, identifier.operator String());
}
} // fallthrough
FALLTHROUGH;
}
case GDScriptTokenizer::TK_OP_ASSIGN: {
lv->assignments += 1;
lv->usages--; // Assignment is not really usage
@ -3636,7 +3637,8 @@ void GDScriptParser::_parse_class(ClassNode *p_class) {
return;
}
}; //fallthrough to function
FALLTHROUGH;
}
case GDScriptTokenizer::TK_PR_FUNCTION: {
bool _static = false;
@ -4086,7 +4088,8 @@ void GDScriptParser::_parse_class(ClassNode *p_class) {
break;
}
}; //fallthrough to use the same
FALLTHROUGH;
}
case Variant::REAL: {
if (tokenizer->get_token() == GDScriptTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier() == "EASE") {
@ -4511,6 +4514,7 @@ void GDScriptParser::_parse_class(ClassNode *p_class) {
#ifdef DEBUG_ENABLED
_add_warning(GDScriptWarning::DEPRECATED_KEYWORD, tokenizer->get_token_line(), "slave", "puppet");
#endif
FALLTHROUGH;
case GDScriptTokenizer::TK_PR_PUPPET: {
//may be fallthrough from export, ignore if so
@ -4578,7 +4582,7 @@ void GDScriptParser::_parse_class(ClassNode *p_class) {
continue;
} break;
case GDScriptTokenizer::TK_PR_VAR: {
//variale declaration and (eventual) initialization
// variable declaration and (eventual) initialization
ClassNode::Member member;
@ -5290,7 +5294,8 @@ String GDScriptParser::DataType::to_string() const {
if (!gds_class.empty()) {
return gds_class;
}
} // fallthrough
FALLTHROUGH;
}
case SCRIPT: {
if (is_meta_type) {
return script_type->get_class_name().operator String();
@ -8046,7 +8051,8 @@ void GDScriptParser::_check_block_types(BlockNode *p_block) {
if (cn->value.get_type() == Variant::STRING) {
break;
}
} // falthrough
FALLTHROUGH;
}
default: {
_mark_line_as_safe(statement->line);
_reduce_node_type(statement); // Test for safety anyway

2
modules/gdscript/gdscript_tokenizer.cpp
View File

@ -744,7 +744,7 @@ void GDScriptTokenizerText::_advance() {
}
INCPOS(1);
is_node_path = true;
FALLTHROUGH;
case '\'':
case '"': {

1
modules/mono/editor/bindings_generator.cpp
View File

@ -2406,6 +2406,7 @@ void BindingsGenerator::_default_argument_from_variant(const Variant &p_val, Arg
r_iarg.default_argument = "null";
break;
}
FALLTHROUGH;
case Variant::DICTIONARY:
case Variant::_RID:
r_iarg.default_argument = "new %s()";

7
scene/2d/collision_object_2d.cpp
View File

@ -29,6 +29,7 @@
/*************************************************************************/
#include "collision_object_2d.h"
#include "scene/scene_string_names.h"
#include "servers/physics_2d_server.h"
@ -56,7 +57,7 @@ void CollisionObject2D::_notification(int p_what) {
_update_pickable();
//get space
}
} break;
case NOTIFICATION_ENTER_CANVAS: {
@ -64,7 +65,7 @@ void CollisionObject2D::_notification(int p_what) {
Physics2DServer::get_singleton()->area_attach_canvas_instance_id(rid, get_canvas_layer_instance_id());
else
Physics2DServer::get_singleton()->body_attach_canvas_instance_id(rid, get_canvas_layer_instance_id());
}
} break;
case NOTIFICATION_VISIBILITY_CHANGED: {
@ -101,7 +102,7 @@ void CollisionObject2D::_notification(int p_what) {
Physics2DServer::get_singleton()->area_attach_canvas_instance_id(rid, 0);
else
Physics2DServer::get_singleton()->body_attach_canvas_instance_id(rid, 0);
}
} break;
}
}

2
scene/3d/collision_object.cpp
View File

@ -52,7 +52,7 @@ void CollisionObject::_notification(int p_what) {
_update_pickable();
//get space
};
} break;
case NOTIFICATION_TRANSFORM_CHANGED: {

2
scene/gui/button.cpp
View File

@ -29,6 +29,7 @@
/*************************************************************************/
#include "button.h"
#include "core/translation.h"
#include "servers/visual_server.h"
@ -102,6 +103,7 @@ void Button::_notification(int p_what) {
break;
}
FALLTHROUGH;
}
case DRAW_PRESSED: {

9
scene/gui/line_edit.cpp
View File

@ -29,6 +29,7 @@
/*************************************************************************/
#include "line_edit.h"
#include "core/message_queue.h"
#include "core/os/keyboard.h"
#include "core/os/os.h"
@ -320,7 +321,7 @@ void LineEdit::_gui_input(Ref<InputEvent> p_event) {
handled = false;
break;
}
// numlock disabled. fallthrough to key_left
FALLTHROUGH;
}
case KEY_LEFT: {
@ -367,7 +368,7 @@ void LineEdit::_gui_input(Ref<InputEvent> p_event) {
handled = false;
break;
}
// numlock disabled. fallthrough to key_right
FALLTHROUGH;
}
case KEY_RIGHT: {
@ -474,7 +475,7 @@ void LineEdit::_gui_input(Ref<InputEvent> p_event) {
handled = false;
break;
}
// numlock disabled. fallthrough to key_home
FALLTHROUGH;
}
case KEY_HOME: {
@ -487,7 +488,7 @@ void LineEdit::_gui_input(Ref<InputEvent> p_event) {
handled = false;
break;
}
// numlock disabled. fallthrough to key_end
FALLTHROUGH;
}
case KEY_END: {

51
scene/gui/text_edit.cpp
View File

@ -2517,7 +2517,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_left
FALLTHROUGH;
}
case KEY_LEFT: {
@ -2580,7 +2580,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_right
FALLTHROUGH;
}
case KEY_RIGHT: {
@ -2641,7 +2641,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_up
FALLTHROUGH;
}
case KEY_UP: {
@ -2694,7 +2694,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_down
FALLTHROUGH;
}
case KEY_DOWN: {
@ -2817,11 +2817,10 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_home
FALLTHROUGH;
}
#ifdef APPLE_STYLE_KEYS
case KEY_HOME: {
#ifdef APPLE_STYLE_KEYS
if (k->get_shift())
_pre_shift_selection();
@ -2831,11 +2830,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
_post_shift_selection();
else if (k->get_command() || k->get_control())
deselect();
} break;
#else
case KEY_HOME: {
if (k->get_shift())
_pre_shift_selection();
@ -2876,19 +2871,17 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
deselect();
_cancel_completion();
completion_hint = "";
} break;
#endif
} break;
case KEY_KP_1: {
if (k->get_unicode() != 0) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_end
FALLTHROUGH;
}
#ifdef APPLE_STYLE_KEYS
case KEY_END: {
#ifdef APPLE_STYLE_KEYS
if (k->get_shift())
_pre_shift_selection();
@ -2898,11 +2891,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
_post_shift_selection();
else if (k->get_command() || k->get_control())
deselect();
} break;
#else
case KEY_END: {
if (k->get_shift())
_pre_shift_selection();
@ -2929,15 +2918,14 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
_cancel_completion();
completion_hint = "";
} break;
#endif
} break;
case KEY_KP_9: {
if (k->get_unicode() != 0) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_pageup
FALLTHROUGH;
}
case KEY_PAGEUP: {
@ -2960,7 +2948,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
scancode_handled = false;
break;
}
// numlock disabled. fallthrough to key_pagedown
FALLTHROUGH;
}
case KEY_PAGEDOWN: {
@ -3139,21 +3127,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
if (scancode_handled)
accept_event();
/*
if (!scancode_handled && !k->get_command() && !k->get_alt()) {
if (k->get_unicode()>=32) {
if (readonly)
break;
accept_event();
} else {
break;
}
}
*/
if (k->get_scancode() == KEY_INSERT) {
set_insert_mode(!insert_mode);
accept_event();
@ -3196,7 +3170,6 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
end_complex_operation();
}
accept_event();
} else {
}
}

4
scene/gui/tree.cpp
View File

@ -29,7 +29,6 @@
/*************************************************************************/
#include "tree.h"
#include <limits.h>
#include "core/math/math_funcs.h"
#include "core/os/input.h"
@ -43,6 +42,8 @@
#include "editor/editor_node.h"
#endif
#include <limits.h>
void TreeItem::move_to_top() {
if (!parent || parent->children == this)
@ -940,6 +941,7 @@ int Tree::compute_item_height(TreeItem *p_item) const {
int check_icon_h = cache.checked->get_height();
if (height < check_icon_h)
height = check_icon_h;
FALLTHROUGH;
}
case TreeItem::CELL_MODE_STRING:
case TreeItem::CELL_MODE_CUSTOM: