rust/src/etc/generate-deriving-span-tests.py
2014-02-05 19:53:53 +01:00

132 lines
3.9 KiB
Python
Executable File

#!/usr/bin/env python
#
# Copyright 2013 The Rust Project Developers. See the COPYRIGHT
# file at the top-level directory of this distribution and at
# http://rust-lang.org/COPYRIGHT.
#
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
# option. This file may not be copied, modified, or distributed
# except according to those terms.
"""
This script creates a pile of compile-fail tests check that all the
derivings have spans that point to the fields, rather than the
#[deriving(...)] line.
sample usage: src/etc/generate-deriving-span-tests.py
"""
import sys, os, datetime, stat
TEST_DIR = os.path.abspath(
os.path.join(os.path.dirname(__file__), '../test/compile-fail'))
YEAR = datetime.datetime.now().year
TEMPLATE = """// Copyright {year} The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// This file was auto-generated using 'src/etc/generate-keyword-span-tests.py'
#[feature(struct_variant)];
extern mod extra;
{error_deriving}
struct Error;
{code}
fn main() {{}}
"""
ENUM_STRING = """
#[deriving({traits})]
enum Enum {{
A(
Error {errors}
)
}}
"""
ENUM_STRUCT_VARIANT_STRING = """
#[deriving({traits})]
enum Enum {{
A {{
x: Error {errors}
}}
}}
"""
STRUCT_STRING = """
#[deriving({traits})]
struct Struct {{
x: Error {errors}
}}
"""
STRUCT_TUPLE_STRING = """
#[deriving({traits})]
struct Struct(
Error {errors}
);
"""
ENUM_TUPLE, ENUM_STRUCT, STRUCT_FIELDS, STRUCT_TUPLE = range(4)
def create_test_case(type, trait, super_traits, number_of_errors):
string = [ENUM_STRING, ENUM_STRUCT_VARIANT_STRING, STRUCT_STRING, STRUCT_TUPLE_STRING][type]
all_traits = ','.join([trait] + super_traits)
super_traits = ','.join(super_traits)
error_deriving = '#[deriving(%s)]' % super_traits if super_traits else ''
errors = '\n'.join('//~%s ERROR' % ('^' * n) for n in range(error_count))
code = string.format(traits = all_traits, errors = errors)
return TEMPLATE.format(year = YEAR, error_deriving=error_deriving, code = code)
def write_file(name, string):
test_file = os.path.join(TEST_DIR, 'deriving-span-%s.rs' % name)
# set write permission if file exists, so it can be changed
if os.path.exists(test_file):
os.chmod(test_file, stat.S_IWUSR)
with open(test_file, 'wt') as f:
f.write(string)
# mark file read-only
os.chmod(test_file, stat.S_IRUSR|stat.S_IRGRP|stat.S_IROTH)
ENUM = 1
STRUCT = 2
ALL = STRUCT | ENUM
traits = {
'Zero': (STRUCT, [], 1),
'Default': (STRUCT, [], 1),
'FromPrimitive': (0, [], 0), # only works for C-like enums
'Decodable': (0, [], 0), # FIXME: quoting gives horrible spans
'Encodable': (0, [], 0), # FIXME: quoting gives horrible spans
}
for (trait, supers, errs) in [('Rand', [], 1),
('Clone', [], 1), ('DeepClone', ['Clone'], 1),
('Eq', [], 2), ('Ord', [], 8),
('TotalEq', [], 1), ('TotalOrd', ['TotalEq'], 1)]:
traits[trait] = (ALL, supers, errs)
for (trait, (types, super_traits, error_count)) in traits.items():
mk = lambda ty: create_test_case(ty, trait, super_traits, error_count)
if types & ENUM:
write_file(trait + '-enum', mk(ENUM_TUPLE))
write_file(trait + '-enum-struct-variant', mk(ENUM_STRUCT))
if types & STRUCT:
write_file(trait + '-struct', mk(STRUCT_FIELDS))
write_file(trait + '-tuple-struct', mk(STRUCT_TUPLE))