GDScript: Fix implicit conversions for function returns

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

@@ -0,0 +1,34 @@
+func convert_literal_int_to_float() -> float: return 76
+func convert_arg_int_to_float(arg: int) -> float: return arg
+func convert_var_int_to_float() -> float: var number := 59; return number
+
+func convert_literal_array_to_packed() -> PackedStringArray: return ['46']
+func convert_arg_array_to_packed(arg: Array) -> PackedStringArray: return arg
+func convert_var_array_to_packed() -> PackedStringArray: var array := ['79']; return array
+
+func test():
+	var converted_literal_int := convert_literal_int_to_float()
+	assert(typeof(converted_literal_int) == TYPE_FLOAT)
+	assert(converted_literal_int == 76.0)
+
+	var converted_arg_int := convert_arg_int_to_float(36)
+	assert(typeof(converted_arg_int) == TYPE_FLOAT)
+	assert(converted_arg_int == 36.0)
+
+	var converted_var_int := convert_var_int_to_float()
+	assert(typeof(converted_var_int) == TYPE_FLOAT)
+	assert(converted_var_int == 59.0)
+
+	var converted_literal_array := convert_literal_array_to_packed()
+	assert(typeof(converted_literal_array) == TYPE_PACKED_STRING_ARRAY)
+	assert(str(converted_literal_array) == '["46"]')
+
+	var converted_arg_array := convert_arg_array_to_packed(['91'])
+	assert(typeof(converted_arg_array) == TYPE_PACKED_STRING_ARRAY)
+	assert(str(converted_arg_array) == '["91"]')
+
+	var converted_var_array := convert_var_array_to_packed()
+	assert(typeof(converted_var_array) == TYPE_PACKED_STRING_ARRAY)
+	assert(str(converted_var_array) == '["79"]')
+
+	print('ok')

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

@@ -0,0 +1,2 @@
+GDTEST_OK
+ok