nac3-spec/toy-impl/test_inference.py

from type_def import *
from inference import *
from helper import *

types = {
    'int32': PrimitiveType('int32'),
    'int64': PrimitiveType('int64'),
    'str': PrimitiveType('str'),
}

i32 = types['int32']
i64 = types['int64']
s = types['str']


variables = {
    'X': TypeVariable('X', []),
    'Y': TypeVariable('Y', []),
    'I': TypeVariable('I', [i32, i64]),
    'A': TypeVariable('A', [i32, i64, s]),
}

X = variables['X']
Y = variables['Y']
I = variables['I']
A = variables['A']

i32.methods['__init__'] = ([SelfType(), I], None, set())
i32.methods['__add__'] = ([SelfType(), i32], i32, set())
i32.methods['__sub__'] = ([SelfType(), i32], i32, set())
i32.methods['foo'] = ([SelfType(), i32], i32, set())

i64.methods['__init__'] = ([SelfType(), I], None, set())
i64.methods['__add__'] = ([SelfType(), i64], i64, set())
i64.methods['__sub__'] = ([SelfType(), i64], i64, set())
i64.methods['foo'] = ([SelfType(), i64], i32, set())

ctx = Context(variables, types)

def test_call(obj, fn, args, assumptions = {}):
    args_str = ', '.join([str(v) for v in args])
    obj_str = '' if obj is None else str(obj) + '.'
    print(f'Testing {obj_str}{fn}({args_str}) w.r.t. {stringify_subst(assumptions)}')
    try:
        result = resolve_call(obj, fn, args, assumptions, ctx)
        print(result)
    except CustomError as err:
        print(f'error: {err.msg}')

test_call(None, 'int32', [])
test_call(None, 'int32', [i32])
test_call(None, 'int32', [i64])
test_call(None, 'int32', [I])
test_call(None, 'int32', [A])
test_call(None, 'int32', [i32, i64])
test_call(i32, '__add__', [])
test_call(i32, '__add__', [i32])
test_call(i32, '__add__', [i64])
test_call(i32, '__add__', [i32, i32])
test_call(I, '__add__', [I])
test_call(I, 'foo', [I])