GDScript: Fix common mismatched external parser errors

modules/gdscript/gdscript_analyzer.h

@@ -41,9 +41,22 @@
 class GDScriptAnalyzer {
 	GDScriptParser *parser = nullptr;
 
+	template <typename Fn>
+	class Finally {
+		Fn fn;
+
+	public:
+		Finally(Fn p_fn) :
+				fn(p_fn) {}
+		~Finally() {
+			fn();
+		}
+	};
+
 	const GDScriptParser::EnumNode *current_enum = nullptr;
 	GDScriptParser::LambdaNode *current_lambda = nullptr;
 	List<GDScriptParser::LambdaNode *> pending_body_resolution_lambdas;
+	HashMap<const GDScriptParser::ClassNode *, Ref<GDScriptParserRef>> external_class_parser_cache;
 	bool static_context = false;
 
 	// Tests for detecting invalid overloading of script members
@@ -52,7 +65,7 @@ class GDScriptAnalyzer {
 	Error check_native_member_name_conflict(const StringName &p_member_name, const GDScriptParser::Node *p_member_node, const StringName &p_native_type_string);
 	Error check_class_member_name_conflict(const GDScriptParser::ClassNode *p_class_node, const StringName &p_member_name, const GDScriptParser::Node *p_member_node);
 
-	void get_class_node_current_scope_classes(GDScriptParser::ClassNode *p_node, List<GDScriptParser::ClassNode *> *p_list);
+	void get_class_node_current_scope_classes(GDScriptParser::ClassNode *p_node, List<GDScriptParser::ClassNode *> *p_list, GDScriptParser::Node *p_source);
 
 	Error resolve_class_inheritance(GDScriptParser::ClassNode *p_class, const GDScriptParser::Node *p_source = nullptr);
 	Error resolve_class_inheritance(GDScriptParser::ClassNode *p_class, bool p_recursive);
@@ -132,6 +145,8 @@ class GDScriptAnalyzer {
 	void resolve_pending_lambda_bodies();
 	bool class_exists(const StringName &p_class) const;
 	void reduce_identifier_from_base_set_class(GDScriptParser::IdentifierNode *p_identifier, GDScriptParser::DataType p_identifier_datatype);
+	Ref<GDScriptParserRef> ensure_cached_parser_for_class(const GDScriptParser::ClassNode *p_class, const GDScriptParser::ClassNode *p_from_class, const String &p_context, const GDScriptParser::Node *p_source);
+	Ref<GDScript> get_depended_shallow_script(const String &p_path, Error &r_error);
 #ifdef DEBUG_ENABLED
 	void is_shadowing(GDScriptParser::IdentifierNode *p_identifier, const String &p_context, const bool p_in_local_scope);
 #endif

modules/gdscript/tests/scripts/analyzer/errors/cyclic_ref_external.out

@@ -1,2 +1,2 @@
 GDTEST_ANALYZER_ERROR
-Could not resolve member "v".
+Could not resolve external class member "v".

modules/gdscript/tests/scripts/analyzer/features/external_parser.gd

@@ -0,0 +1,16 @@
+extends "external_parser_base1.notest.gd"
+
+const External1 = preload("external_parser_script1.notest.gd")
+
+func test_external_base_parser_type_resolve(_v: TypeFromBase):
+	pass
+
+func test():
+	var ext := External1.new()
+	print(ext.array[0].test2)
+	print(ext.get_external2().get_external3().test3)
+	# TODO: This actually produces a runtime error, but were testing the analyzer here
+	#baz(ext)
+
+func baz(e1: External1) -> void:
+	print(e1.e1c.bar)

modules/gdscript/tests/scripts/analyzer/features/external_parser.out

@@ -0,0 +1,3 @@
+GDTEST_OK
+test2
+test3

modules/gdscript/tests/scripts/analyzer/features/external_parser_base1.notest.gd

@@ -0,0 +1 @@
+extends "external_parser_base2.notest.gd"

modules/gdscript/tests/scripts/analyzer/features/external_parser_base2.notest.gd

@@ -0,0 +1,2 @@
+class TypeFromBase:
+	pass

modules/gdscript/tests/scripts/analyzer/features/external_parser_script1.notest.gd

@@ -0,0 +1,9 @@
+const External2 = preload("external_parser_script2.notest.gd")
+const External1c = preload("external_parser_script1c.notest.gd")
+
+@export var e1c: External1c
+
+var array: Array[External2] = [ External2.new() ]
+
+func get_external2() -> External2:
+	return External2.new()

modules/gdscript/tests/scripts/analyzer/features/external_parser_script1c.notest.gd

@@ -0,0 +1 @@
+extends "external_parser_script1d.notest.gd"

modules/gdscript/tests/scripts/analyzer/features/external_parser_script1d.notest.gd

@@ -0,0 +1,5 @@
+extends "external_parser_script1f.notest.gd"
+
+const External1e = preload("external_parser_script1e.notest.gd")
+
+var bar: Array[External1e]

modules/gdscript/tests/scripts/analyzer/features/external_parser_script1f.notest.gd

@@ -0,0 +1 @@
+extends Resource

modules/gdscript/tests/scripts/analyzer/features/external_parser_script2.notest.gd

@@ -0,0 +1,6 @@
+const External3 = preload("external_parser_script3.notest.gd")
+
+var test2 := "test2"
+
+func get_external3() -> External3:
+	return External3.new()

modules/gdscript/tests/scripts/analyzer/features/external_parser_script3.notest.gd

@@ -0,0 +1 @@
+var test3 := "test3"