GDScript: Allow use local constants as types

modules/gdscript/tests/scripts/analyzer/errors/local_const_as_type_use_before_declared.gd

@@ -0,0 +1,5 @@
+enum MyEnum {}
+
+func test():
+	var e: E
+	const E = MyEnum

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

@@ -0,0 +1,2 @@
+GDTEST_ANALYZER_ERROR
+Local constant "E" is not resolved at this point.

modules/gdscript/tests/scripts/analyzer/errors/local_const_as_type_use_not_const.gd

@@ -0,0 +1,5 @@
+enum MyEnum {}
+
+func test():
+	var E = MyEnum
+	var e: E

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

@@ -0,0 +1,2 @@
+GDTEST_ANALYZER_ERROR
+Local variable "E" cannot be used as a type.

modules/gdscript/tests/scripts/analyzer/errors/local_const_as_type_use_not_type.gd

@@ -0,0 +1,5 @@
+enum MyEnum {A}
+
+func test():
+	const E = MyEnum.A
+	var e: E

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

@@ -0,0 +1,2 @@
+GDTEST_ANALYZER_ERROR
+Local constant "E" is not a valid type.

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

@@ -0,0 +1,41 @@
+class InnerClass:
+	enum InnerEnum {A = 2}
+	const INNER_CONST = "INNER_CONST"
+
+enum Enum {A = 1}
+
+const Other = preload("./local_const_as_type.notest.gd")
+
+func test():
+	const IC = InnerClass
+	const IE = IC.InnerEnum
+	const E = Enum
+	# Doesn't work in CI, but works in the editor. Looks like an unrelated bug. TODO: Investigate it.
+	# Error: Invalid call. Nonexistent function 'new' in base 'GDScript'.
+	var a1: IC = null # IC.new()
+	var a2: IE = IE.A
+	var a3: IC.InnerEnum = IE.A
+	var a4: E = E.A
+	print(a1.INNER_CONST)
+	print(a2)
+	print(a3)
+	print(a4)
+
+	const O = Other
+	const OV: Variant = Other # Removes metatype.
+	const OIC = O.InnerClass
+	const OIE = OIC.InnerEnum
+	const OE = O.Enum
+	var b: O = O.new()
+	@warning_ignore("unsafe_method_access")
+	var bv: OV = OV.new()
+	var b1: OIC = OIC.new()
+	var b2: OIE = OIE.A
+	var b3: O.InnerClass.InnerEnum = OIE.A
+	var b4: OE = OE.A
+	print(b.CONST)
+	print(bv.CONST)
+	print(b1.INNER_CONST)
+	print(b2)
+	print(b3)
+	print(b4)

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

@@ -0,0 +1,6 @@
+class InnerClass:
+	enum InnerEnum {A = 20}
+	const INNER_CONST = "OTHER_INNER_CONST"
+
+enum Enum {A = 10}
+const CONST = "OTHER_CONST"

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

@@ -0,0 +1,11 @@
+GDTEST_OK
+INNER_CONST
+2
+2
+1
+OTHER_CONST
+OTHER_CONST
+OTHER_INNER_CONST
+20
+20
+10