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Allow using built-in names for variables, push warnings instead

This commit is contained in:
Yuri Roubinsky 2021-11-13 18:40:53 +03:00
parent 3e214a8838
commit 3396b25489
6 changed files with 44 additions and 27 deletions
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3
doc/classes/ProjectSettings.xml
View File

@ -368,6 +368,9 @@
<member name="debug/gdscript/warnings/return_value_discarded" type="bool" setter="" getter="" default="true">
If [code]true[/code], enables warnings when calling a function without using its return value (by assigning it to a variable or using it as a function argument). Such return values are sometimes used to denote possible errors using the [enum Error] enum.
</member>
<member name="debug/gdscript/warnings/shadowed_global_identifier" type="bool" setter="" getter="" default="true">
If [code]true[/code], enables warnings when defining a local or subclass member variable, signal, or enum that would have the same name as a built-in function or global class name, which possibly shadow it.
</member>
<member name="debug/gdscript/warnings/shadowed_variable" type="bool" setter="" getter="" default="true">
If [code]true[/code], enables warnings when defining a local or subclass member variable that would shadow a variable at an upper level (such as a member variable).
</member>

51
modules/gdscript/gdscript_parser.cpp
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@ -741,20 +741,22 @@ void GDScriptParser::parse_class_member(T *(GDScriptParser::*p_parse_function)()
if (member->identifier != nullptr) {
if (!((String)member->identifier->name).is_empty()) { // Enums may be unnamed.
#ifdef DEBUG_ENABLED
List<MethodInfo> gdscript_funcs;
GDScriptLanguage::get_singleton()->get_public_functions(&gdscript_funcs);
for (MethodInfo &info : gdscript_funcs) {
if (info.name == member->identifier->name) {
push_error(vformat(R"(%s "%s" has the same name as a built-in function.)", p_member_kind.capitalize(), member->identifier->name), member->identifier);
return;
push_warning(member->identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, p_member_kind, member->identifier->name, "built-in function");
}
}
if (Variant::has_utility_function(member->identifier->name)) {
push_warning(member->identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, p_member_kind, member->identifier->name, "built-in function");
}
#endif
if (current_class->members_indices.has(member->identifier->name)) {
push_error(vformat(R"(%s "%s" has the same name as a previously declared %s.)", p_member_kind.capitalize(), member->identifier->name, current_class->get_member(member->identifier->name).get_type_name()), member->identifier);
} else if (Variant::has_utility_function(member->identifier->name)) {
push_error(vformat(R"(%s "%s" has the same name as a built-in function.)", p_member_kind.capitalize(), member->identifier->name), member->identifier);
} else if (ClassDB::class_exists(member->identifier->name)) {
push_error(vformat(R"(%s "%s" has the same name as a global class.)", p_member_kind.capitalize(), member->identifier->name), member->identifier);
} else {
current_class->add_member(member);
}
@ -827,21 +829,18 @@ GDScriptParser::VariableNode *GDScriptParser::parse_variable(bool p_allow_proper
GDScriptParser::IdentifierNode *identifier = parse_identifier();
#ifdef DEBUG_ENABLED
List<MethodInfo> gdscript_funcs;
GDScriptLanguage::get_singleton()->get_public_functions(&gdscript_funcs);
for (MethodInfo &info : gdscript_funcs) {
if (info.name == identifier->name) {
push_error(vformat(R"(Local var "%s" has the same name as a built-in function.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "local variable", identifier->name, "built-in function");
}
}
if (Variant::has_utility_function(identifier->name)) {
push_error(vformat(R"(Local var "%s" has the same name as a built-in function.)", identifier->name), identifier);
return nullptr;
} else if (ClassDB::class_exists(identifier->name)) {
push_error(vformat(R"(Local var "%s" has the same name as a global class.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "local variable", identifier->name, "built-in function");
}
#endif
VariableNode *variable = alloc_node<VariableNode>();
variable->identifier = identifier;
@ -1099,22 +1098,20 @@ GDScriptParser::ParameterNode *GDScriptParser::parse_parameter() {
}
GDScriptParser::IdentifierNode *identifier = parse_identifier();
#ifdef DEBUG_ENABLED
List<MethodInfo> gdscript_funcs;
GDScriptLanguage::get_singleton()->get_public_functions(&gdscript_funcs);
for (MethodInfo &info : gdscript_funcs) {
if (info.name == identifier->name) {
push_error(vformat(R"(Parameter "%s" has the same name as a built-in function.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "parameter", identifier->name, "built-in function");
}
}
if (Variant::has_utility_function(identifier->name)) {
push_error(vformat(R"(Parameter "%s" has the same name as a built-in function.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "parameter", identifier->name, "built-in function");
} else if (ClassDB::class_exists(identifier->name)) {
push_error(vformat(R"(Parameter "%s" has the same name as a global class.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "parameter", identifier->name, "global class");
}
#endif
ParameterNode *parameter = alloc_node<ParameterNode>();
parameter->identifier = identifier;
@ -1195,8 +1192,10 @@ GDScriptParser::EnumNode *GDScriptParser::parse_enum() {
HashMap<StringName, int> elements;
#ifdef DEBUG_ENABLED
List<MethodInfo> gdscript_funcs;
GDScriptLanguage::get_singleton()->get_public_functions(&gdscript_funcs);
#endif
do {
if (check(GDScriptTokenizer::Token::BRACE_CLOSE)) {
@ -1205,20 +1204,18 @@ GDScriptParser::EnumNode *GDScriptParser::parse_enum() {
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifier for enum key.)")) {
EnumNode::Value item;
GDScriptParser::IdentifierNode *identifier = parse_identifier();
#ifdef DEBUG_ENABLED
for (MethodInfo &info : gdscript_funcs) {
if (info.name == identifier->name) {
push_error(vformat(R"(Enum member "%s" has the same name as a built-in function.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "enum member", identifier->name, "built-in function");
}
}
if (Variant::has_utility_function(identifier->name)) {
push_error(vformat(R"(Enum member "%s" has the same name as a built-in function.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "enum member", identifier->name, "built-in function");
} else if (ClassDB::class_exists(identifier->name)) {
push_error(vformat(R"(Enum member "%s" has the same name as a global class.)", identifier->name), identifier);
return nullptr;
push_warning(identifier, GDScriptWarning::SHADOWED_GLOBAL_IDENTIFIER, "enum member", identifier->name, "global class");
}
#endif
item.identifier = identifier;
item.parent_enum = enum_node;
item.line = previous.start_line;

5
modules/gdscript/gdscript_warning.cpp
View File

@ -148,6 +148,10 @@ String GDScriptWarning::get_message() const {
case EMPTY_FILE: {
return "Empty script file.";
}
case SHADOWED_GLOBAL_IDENTIFIER: {
CHECK_SYMBOLS(3);
return vformat(R"(The %s '%s' has the same name as a %s.)", symbols[0], symbols[1], symbols[2]);
}
case WARNING_MAX:
break; // Can't happen, but silences warning
}
@ -194,6 +198,7 @@ String GDScriptWarning::get_name_from_code(Code p_code) {
"ASSERT_ALWAYS_FALSE",
"REDUNDANT_AWAIT",
"EMPTY_FILE",
"SHADOWED_GLOBAL_IDENTIFIER",
};
static_assert((sizeof(names) / sizeof(*names)) == WARNING_MAX, "Amount of warning types don't match the amount of warning names.");

1
modules/gdscript/gdscript_warning.h
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@ -69,6 +69,7 @@ public:
ASSERT_ALWAYS_FALSE, // Expression for assert argument is always false.
REDUNDANT_AWAIT, // await is used but expression is synchronous (not a signal nor a coroutine).
EMPTY_FILE, // A script file is empty.
SHADOWED_GLOBAL_IDENTIFIER, // A global class or function has the same name as variable.
WARNING_MAX,
};

2
modules/gdscript/tests/scripts/parser/warnings/shadowed_global_identifier.gd Normal file
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@ -0,0 +1,2 @@
func test():
var abs = "This variable has the same name as the built-in function."

9
modules/gdscript/tests/scripts/parser/warnings/shadowed_global_identifier.out Normal file
View File

@ -0,0 +1,9 @@
GDTEST_OK
>> WARNING
>> Line: 2
>> SHADOWED_GLOBAL_IDENTIFIER
>> The local variable 'abs' has the same name as a built-in function.
>> WARNING
>> Line: 2
>> UNUSED_VARIABLE
>> The local variable 'abs' is declared but never used in the block. If this is intended, prefix it with an underscore: '_abs'