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Add support for static variables in GDScript

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Which allows editable data associated with a particular class instead of
the instance. Scripts with static variables are kept in memory
indefinitely unless the `@static_unload` annotation is used or the
`static_unload()` method is called on the GDScript.

If the custom function `_static_init()` exists it will be called when
the class is loaded, after the static variables are set.
This commit is contained in:
George Marques
2023-04-19 11:10:35 -03:00
parent 352ebe9725
commit 0ba6048ad3
36 changed files with 689 additions and 86 deletions
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21
modules/gdscript/gdscript_parser.h
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@@ -709,6 +709,8 @@ public:
ClassNode *outer = nullptr;
bool extends_used = false;
bool onready_used = false;
bool has_static_data = false;
bool annotated_static_unload = false;
String extends_path;
Vector<IdentifierNode *> extends; // List for indexing: extends A.B.C
DataType base_type;
@@ -847,6 +849,7 @@ public:
LOCAL_BIND, // Pattern bind.
MEMBER_SIGNAL,
MEMBER_VARIABLE,
STATIC_VARIABLE,
MEMBER_CONSTANT,
INHERITED_VARIABLE,
};
@@ -1202,6 +1205,7 @@ public:
bool onready = false;
PropertyInfo export_info;
int assignments = 0;
bool is_static = false;
#ifdef TOOLS_ENABLED
String doc_description;
#endif // TOOLS_ENABLED
@@ -1405,16 +1409,16 @@ private:
// Main blocks.
void parse_program();
ClassNode *parse_class();
ClassNode *parse_class(bool p_is_static);
void parse_class_name();
void parse_extends();
void parse_class_body(bool p_is_multiline);
template <class T>
void parse_class_member(T *(GDScriptParser::*p_parse_function)(), AnnotationInfo::TargetKind p_target, const String &p_member_kind);
SignalNode *parse_signal();
EnumNode *parse_enum();
void parse_class_member(T *(GDScriptParser::*p_parse_function)(bool), AnnotationInfo::TargetKind p_target, const String &p_member_kind, bool p_is_static = false);
SignalNode *parse_signal(bool p_is_static);
EnumNode *parse_enum(bool p_is_static);
ParameterNode *parse_parameter();
FunctionNode *parse_function();
FunctionNode *parse_function(bool p_is_static);
void parse_function_signature(FunctionNode *p_function, SuiteNode *p_body, const String &p_type);
SuiteNode *parse_suite(const String &p_context, SuiteNode *p_suite = nullptr, bool p_for_lambda = false);
// Annotations
@@ -1431,14 +1435,15 @@ private:
bool export_group_annotations(const AnnotationNode *p_annotation, Node *p_target);
bool warning_annotations(const AnnotationNode *p_annotation, Node *p_target);
bool rpc_annotation(const AnnotationNode *p_annotation, Node *p_target);
bool static_unload_annotation(const AnnotationNode *p_annotation, Node *p_target);
// Statements.
Node *parse_statement();
VariableNode *parse_variable();
VariableNode *parse_variable(bool p_allow_property);
VariableNode *parse_variable(bool p_is_static);
VariableNode *parse_variable(bool p_is_static, bool p_allow_property);
VariableNode *parse_property(VariableNode *p_variable, bool p_need_indent);
void parse_property_getter(VariableNode *p_variable);
void parse_property_setter(VariableNode *p_variable);
ConstantNode *parse_constant();
ConstantNode *parse_constant(bool p_is_static);
AssertNode *parse_assert();
BreakNode *parse_break();
ContinueNode *parse_continue();