Use string literals for parser rule error messages

Author: wravery

src/SyntaxTree.cpp

@@ -662,7 +662,7 @@ struct executable_selector<type_condition> : std::true_type
 template <typename Rule>
 struct ast_control : normal<Rule>
 {
-	static const std::string error_message;
+	static const char* error_message;
 
 	template <typename Input, typename... State>
 	[[noreturn]] static void raise(const Input& in, State&&...)
@@ -672,175 +672,175 @@ struct ast_control : normal<Rule>
 };
 
 template <>
-const std::string ast_control<one<'}'>>::error_message = "Expected }";
+const char* ast_control<one<'}'>>::error_message = "Expected }";
 template <>
-const std::string ast_control<one<']'>>::error_message = "Expected ]";
+const char* ast_control<one<']'>>::error_message = "Expected ]";
 template <>
-const std::string ast_control<one<')'>>::error_message = "Expected )";
+const char* ast_control<one<')'>>::error_message = "Expected )";
 template <>
-const std::string ast_control<quote_token>::error_message = "Expected \"";
+const char* ast_control<quote_token>::error_message = "Expected \"";
 template <>
-const std::string ast_control<block_quote_token>::error_message = "Expected \"\"\"";
+const char* ast_control<block_quote_token>::error_message = "Expected \"\"\"";
 
 template <>
-const std::string ast_control<variable_name_content>::error_message =
+const char* ast_control<variable_name_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Variable";
 template <>
-const std::string ast_control<escaped_unicode_content>::error_message =
+const char* ast_control<escaped_unicode_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#EscapedUnicode";
 template <>
-const std::string ast_control<string_escape_sequence_content>::error_message =
+const char* ast_control<string_escape_sequence_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#EscapedCharacter";
 template <>
-const std::string ast_control<string_quote_content>::error_message =
+const char* ast_control<string_quote_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#StringCharacter";
 template <>
-const std::string ast_control<block_quote_content>::error_message =
+const char* ast_control<block_quote_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#BlockStringCharacter";
 template <>
-const std::string ast_control<fractional_part_content>::error_message =
+const char* ast_control<fractional_part_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#FractionalPart";
 template <>
-const std::string ast_control<exponent_part_content>::error_message =
+const char* ast_control<exponent_part_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ExponentPart";
 template <>
-const std::string ast_control<argument_content>::error_message =
+const char* ast_control<argument_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Argument";
 template <>
-const std::string ast_control<arguments_content>::error_message =
+const char* ast_control<arguments_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Arguments";
 template <>
-const std::string ast_control<list_value_content>::error_message =
+const char* ast_control<list_value_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ListValue";
 template <>
-const std::string ast_control<object_field_content>::error_message =
+const char* ast_control<object_field_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ObjectField";
 template <>
-const std::string ast_control<object_value_content>::error_message =
+const char* ast_control<object_value_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ObjectValue";
 template <>
-const std::string ast_control<input_value_content>::error_message =
+const char* ast_control<input_value_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Value";
 template <>
-const std::string ast_control<default_value_content>::error_message =
+const char* ast_control<default_value_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#DefaultValue";
 template <>
-const std::string ast_control<list_type_content>::error_message =
+const char* ast_control<list_type_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ListType";
 template <>
-const std::string ast_control<type_name_content>::error_message =
+const char* ast_control<type_name_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Type";
 template <>
-const std::string ast_control<variable_content>::error_message =
+const char* ast_control<variable_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#VariableDefinition";
 template <>
-const std::string ast_control<variable_definitions_content>::error_message =
+const char* ast_control<variable_definitions_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#VariableDefinitions";
 template <>
-const std::string ast_control<directive_content>::error_message =
+const char* ast_control<directive_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Directive";
 template <>
-const std::string ast_control<field_content>::error_message =
+const char* ast_control<field_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Field";
 template <>
-const std::string ast_control<type_condition_content>::error_message =
+const char* ast_control<type_condition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#TypeCondition";
 template <>
-const std::string ast_control<fragement_spread_or_inline_fragment_content>::error_message =
+const char* ast_control<fragement_spread_or_inline_fragment_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#FragmentSpread or "
 	"https://spec.graphql.org/October2021/#InlineFragment";
 template <>
-const std::string ast_control<selection_set_content>::error_message =
+const char* ast_control<selection_set_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#SelectionSet";
 template <>
-const std::string ast_control<operation_definition_operation_type_content>::error_message =
+const char* ast_control<operation_definition_operation_type_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#OperationDefinition";
 template <>
-const std::string ast_control<fragment_definition_content>::error_message =
+const char* ast_control<fragment_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#FragmentDefinition";
 template <>
-const std::string ast_control<root_operation_definition_content>::error_message =
+const char* ast_control<root_operation_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#RootOperationTypeDefinition";
 template <>
-const std::string ast_control<schema_definition_content>::error_message =
+const char* ast_control<schema_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#SchemaDefinition";
 template <>
-const std::string ast_control<scalar_type_definition_content>::error_message =
+const char* ast_control<scalar_type_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ScalarTypeDefinition";
 template <>
-const std::string ast_control<arguments_definition_content>::error_message =
+const char* ast_control<arguments_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ArgumentsDefinition";
 template <>
-const std::string ast_control<field_definition_content>::error_message =
+const char* ast_control<field_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#FieldDefinition";
 template <>
-const std::string ast_control<fields_definition_content>::error_message =
+const char* ast_control<fields_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#FieldsDefinition";
 template <>
-const std::string ast_control<implements_interfaces_content>::error_message =
+const char* ast_control<implements_interfaces_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ImplementsInterfaces";
 template <>
-const std::string ast_control<object_type_definition_content>::error_message =
+const char* ast_control<object_type_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ObjectTypeDefinition";
 template <>
-const std::string ast_control<interface_type_definition_content>::error_message =
+const char* ast_control<interface_type_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#InterfaceTypeDefinition";
 template <>
-const std::string ast_control<union_member_types_content>::error_message =
+const char* ast_control<union_member_types_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#UnionMemberTypes";
 template <>
-const std::string ast_control<union_type_definition_content>::error_message =
+const char* ast_control<union_type_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#UnionTypeDefinition";
 template <>
-const std::string ast_control<enum_value_definition_content>::error_message =
+const char* ast_control<enum_value_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#EnumValueDefinition";
 template <>
-const std::string ast_control<enum_values_definition_content>::error_message =
+const char* ast_control<enum_values_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#EnumValuesDefinition";
 template <>
-const std::string ast_control<enum_type_definition_content>::error_message =
+const char* ast_control<enum_type_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#EnumTypeDefinition";
 template <>
-const std::string ast_control<input_field_definition_content>::error_message =
+const char* ast_control<input_field_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#InputValueDefinition";
 template <>
-const std::string ast_control<input_fields_definition_content>::error_message =
+const char* ast_control<input_fields_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#InputFieldsDefinition";
 template <>
-const std::string ast_control<input_object_type_definition_content>::error_message =
+const char* ast_control<input_object_type_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#InputObjectTypeDefinition";
 template <>
-const std::string ast_control<directive_definition_content>::error_message =
+const char* ast_control<directive_definition_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#DirectiveDefinition";
 template <>
-const std::string ast_control<schema_extension_content>::error_message =
+const char* ast_control<schema_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#SchemaExtension";
 template <>
-const std::string ast_control<scalar_type_extension_content>::error_message =
+const char* ast_control<scalar_type_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ScalarTypeExtension";
 template <>
-const std::string ast_control<object_type_extension_content>::error_message =
+const char* ast_control<object_type_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#ObjectTypeExtension";
 template <>
-const std::string ast_control<interface_type_extension_content>::error_message =
+const char* ast_control<interface_type_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#InterfaceTypeExtension";
 template <>
-const std::string ast_control<union_type_extension_content>::error_message =
+const char* ast_control<union_type_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#UnionTypeExtension";
 template <>
-const std::string ast_control<enum_type_extension_content>::error_message =
+const char* ast_control<enum_type_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#EnumTypeExtension";
 template <>
-const std::string ast_control<input_object_type_extension_content>::error_message =
+const char* ast_control<input_object_type_extension_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#InputObjectTypeExtension";
 template <>
-const std::string ast_control<mixed_document_content>::error_message =
+const char* ast_control<mixed_document_content>::error_message =
 	"Expected https://spec.graphql.org/October2021/#Document";
 template <>
-const std::string ast_control<executable_document_content>::error_message =
+const char* ast_control<executable_document_content>::error_message =
 	"Expected executable https://spec.graphql.org/October2021/#Document";
 template <>
-const std::string ast_control<schema_document_content>::error_message =
+const char* ast_control<schema_document_content>::error_message =
 	"Expected schema type https://spec.graphql.org/October2021/#Document";
 
 ast parseSchemaString(std::string_view input)