mypyc/test-data/exceptions.test

-- Test cases for exception handling insertion transform.
--
-- The result includes refcount handling since these two transforms interact.

[case testListGetAndUnboxError]
from typing import List
def f(x: List[int]) -> int:
    return x[0]
[out]
def f(x):
    x :: list
    r0 :: short_int
    r1 :: object
    r2, r3 :: int
L0:
    r0 = 0
    r1 = x[r0] :: list
    if is_error(r1) goto L3 (error at f:3) else goto L1
L1:
    r2 = unbox(int, r1)
    dec_ref r1
    if is_error(r2) goto L3 (error at f:3) else goto L2
L2:
    return r2
L3:
    r3 = <error> :: int
    return r3

[case testListAppendAndSetItemError]
from typing import List
def f(x: List[int], y: int, z: int) -> None:
    x.append(y)
    x[y] = z
[out]
def f(x, y, z):
    x :: list
    y, z :: int
    r0 :: object
    r1 :: bool
    r2 :: None
    r3 :: object
    r4 :: bool
    r5, r6 :: None
L0:
    inc_ref y :: int
    r0 = box(int, y)
    r1 = x.append(r0) :: list
    dec_ref r0
    if not r1 goto L3 (error at f:3) else goto L1 :: bool
L1:
    r2 = None
    inc_ref z :: int
    r3 = box(int, z)
    r4 = x.__setitem__(y, r3) :: list
    if not r4 goto L3 (error at f:4) else goto L2 :: bool
L2:
    r5 = None
    return r5
L3:
    r6 = <error> :: None
    return r6

[case testOptionalHandling]
from typing import Optional

class A: pass

def f(x: Optional[A]) -> int:
    if x is None:
        return 1
    if x is not None:
        return 2
    return 3
[out]
def f(x):
    x :: union[__main__.A, None]
    r0 :: None
    r1 :: object
    r2 :: bool
    r3 :: short_int
    r4 :: __main__.A
    r5 :: None
    r6 :: object
    r7, r8 :: bool
    r9, r10 :: short_int
    r11 :: int
L0:
    r0 = None
    r1 = box(None, r0)
    r2 = x is r1
    if r2 goto L1 else goto L2 :: bool
L1:
    r3 = 1
    return r3
L2:
    inc_ref x
    r4 = cast(__main__.A, x)
    if is_error(r4) goto L6 (error at f:8) else goto L3
L3:
    r5 = None
    r6 = box(None, r5)
    r7 = r4 is r6
    dec_ref r4
    r8 = !r7
    if r8 goto L4 else goto L5 :: bool
L4:
    r9 = 2
    return r9
L5:
    r10 = 3
    return r10
L6:
    r11 = <error> :: int
    return r11

[case testListSum]
from typing import List
def sum(a: List[int], l: int) -> int:
    sum = 0
    i = 0
    while i < l:
        sum = sum + a[i]
        i = i + 1
    return sum
[out]
def sum(a, l):
    a :: list
    l :: int
    r0 :: short_int
    sum :: int
    r1 :: short_int
    i :: int
    r2 :: bool
    r3 :: object
    r4, r5 :: int
    r6 :: short_int
    r7, r8 :: int
L0:
    r0 = 0
    sum = r0
    r1 = 0
    i = r1
L1:
    r2 = i < l :: int
    if r2 goto L2 else goto L7 :: bool
L2:
    r3 = a[i] :: list
    if is_error(r3) goto L8 (error at sum:6) else goto L3
L3:
    r4 = unbox(int, r3)
    dec_ref r3
    if is_error(r4) goto L8 (error at sum:6) else goto L4
L4:
    r5 = sum + r4 :: int
    dec_ref sum :: int
    dec_ref r4 :: int
    sum = r5
    r6 = 1
    r7 = i + r6 :: int
    dec_ref i :: int
    i = r7
    goto L1
L5:
    return sum
L6:
    r8 = <error> :: int
    return r8
L7:
    dec_ref i :: int
    goto L5
L8:
    dec_ref sum :: int
    dec_ref i :: int
    goto L6

[case testTryExcept]
def g() -> None:
    try:
        object()
    except:
        print("weeee")
[out]
def g():
    r0 :: object
    r1 :: str
    r2, r3 :: object
    r4 :: tuple[object, object, object]
    r5 :: str
    r6 :: object
    r7 :: str
    r8, r9 :: object
    r10 :: bool
    r11, r12 :: None
L0:
L1:
    r0 = builtins :: module
    r1 = unicode_1 :: static  ('object')
    r2 = getattr r0, r1
    if is_error(r2) goto L3 (error at g:3) else goto L2
L2:
    r3 = py_call(r2)
    dec_ref r2
    if is_error(r3) goto L3 (error at g:3) else goto L10
L3:
    r4 = error_catch
    r5 = unicode_2 :: static  ('weeee')
    r6 = builtins :: module
    r7 = unicode_3 :: static  ('print')
    r8 = getattr r6, r7
    if is_error(r8) goto L6 (error at g:5) else goto L4
L4:
    r9 = py_call(r8, r5)
    dec_ref r8
    if is_error(r9) goto L6 (error at g:5) else goto L11
L5:
    restore_exc_info r4
    dec_ref r4
    goto L8
L6:
    restore_exc_info r4
    dec_ref r4
    r10 = keep_propagating
    if not r10 goto L9 else goto L7 :: bool
L7:
    unreachable
L8:
    r11 = None
    return r11
L9:
    r12 = <error> :: None
    return r12
L10:
    dec_ref r3
    goto L8
L11:
    dec_ref r9
    goto L5

[case testGenopsTryFinally]
def a() -> str:
    try:
        print()
        return 'hi'
    finally:
        print('goodbye!')
[out]
def a():
    r0 :: object
    r1 :: str
    r2, r3 :: object
    r4, r5 :: str
    r6 :: tuple[object, object, object]
    r7 :: str
    r8 :: tuple[object, object, object]
    r9 :: str
    r10 :: tuple[object, object, object]
    r11 :: str
    r12 :: object
    r13 :: str
    r14, r15 :: object
    r16, r17 :: bool
    r18 :: str
L0:
L1:
    r0 = builtins :: module
    r1 = unicode_1 :: static  ('print')
    r2 = getattr r0, r1
    if is_error(r2) goto L5 (error at a:3) else goto L2
L2:
    r3 = py_call(r2)
    dec_ref r2
    if is_error(r3) goto L5 (error at a:3) else goto L20
L3:
    r4 = unicode_2 :: static  ('hi')
    inc_ref r4
    r5 = r4
L4:
    r8 = <error> :: tuple[object, object, object]
    r6 = r8
    goto L6
L5:
    r9 = <error> :: str
    r5 = r9
    r10 = error_catch
    r6 = r10
L6:
    r11 = unicode_3 :: static  ('goodbye!')
    r12 = builtins :: module
    r13 = unicode_1 :: static  ('print')
    r14 = getattr r12, r13
    if is_error(r14) goto L13 (error at a:6) else goto L7
L7:
    r15 = py_call(r14, r11)
    dec_ref r14
    if is_error(r15) goto L13 (error at a:6) else goto L21
L8:
    if is_error(r6) goto L11 else goto L9
L9:
    reraise_exc; r16 = 0
    if not r16 goto L13 else goto L22 :: bool
L10:
    unreachable
L11:
    if is_error(r5) goto L18 else goto L12
L12:
    return r5
L13:
    if is_error(r5) goto L14 else goto L23
L14:
    if is_error(r6) goto L16 else goto L15
L15:
    restore_exc_info r6
    dec_ref r6
L16:
    r17 = keep_propagating
    if not r17 goto L19 else goto L17 :: bool
L17:
    unreachable
L18:
    unreachable
L19:
    r18 = <error> :: str
    return r18
L20:
    dec_ref r3
    goto L3
L21:
    dec_ref r15
    goto L8
L22:
    dec_ref r5
    dec_ref r6
    goto L10
L23:
    dec_ref r5
    goto L14

[case testDocstring1]
def lol() -> None:
    """Hello"""
    pass
[out]
def lol():
    r0 :: None
L0:
    r0 = None
    return r0

[case testExceptUndefined1]
from typing import Any
def lol(x: Any) -> object:
    try:
        st = x.foo
    except:
        return ''
    # No uninit check should be generated, since the exception branch always returns
    return st
[out]
def lol(x):
    x :: object
    r0 :: str
    r1, st :: object
    r2 :: tuple[object, object, object]
    r3 :: str
    r4 :: bool
    r5 :: object
L0:
L1:
    r0 = unicode_3 :: static  ('foo')
    r1 = getattr x, r0
    if is_error(r1) goto L3 (error at lol:4) else goto L2
L2:
    st = r1
    goto L4
L3:
    r2 = error_catch
    r3 = unicode_4 :: static
    restore_exc_info r2
    dec_ref r2
    inc_ref r3
    return r3
L4:
    return st

[case testExceptUndefined2]
from typing import Any
def lol(x: Any) -> object:
    try:
        a = x.foo
        b = x.bar
    except:
        pass
    # uninit checks are needed, since the exception can skip initializing the vars
    return a + b
[out]
def lol(x):
    x :: object
    r0 :: str
    r1, a :: object
    r2 :: str
    r3, b :: object
    r4 :: tuple[object, object, object]
    r5 :: bool
    r6 :: object
    r7, r8 :: bool
    r9 :: object
L0:
L1:
    r0 = unicode_3 :: static  ('foo')
    r1 = getattr x, r0
    if is_error(r1) goto L4 (error at lol:4) else goto L15
L2:
    a = r1
    r2 = unicode_4 :: static  ('bar')
    r3 = getattr x, r2
    if is_error(r3) goto L4 (error at lol:5) else goto L16
L3:
    b = r3
    goto L6
L4:
    r4 = error_catch
L5:
    restore_exc_info r4
    dec_ref r4
L6:
    if is_error(a) goto L17 else goto L9
L7:
    raise UnboundLocalError("local variable 'a' referenced before assignment")
    if not r7 goto L14 (error at lol:9) else goto L8 :: bool
L8:
    unreachable
L9:
    if is_error(b) goto L18 else goto L12
L10:
    raise UnboundLocalError("local variable 'b' referenced before assignment")
    if not r8 goto L14 (error at lol:9) else goto L11 :: bool
L11:
    unreachable
L12:
    r6 = a + b
    xdec_ref a
    xdec_ref b
    if is_error(r6) goto L14 (error at lol:9) else goto L13
L13:
    return r6
L14:
    r9 = <error> :: object
    return r9
L15:
    xdec_ref a
    goto L2
L16:
    xdec_ref b
    goto L3
L17:
    xdec_ref b
    goto L7
L18:
    xdec_ref a
    goto L10

[case testMaybeUninitVarExc]
def f(b: bool) -> None:
    u = 'a'
    while b:
        v = 'b'
        if v is not u:
            break
    print(v)
[out]
def f(b):
    b :: bool
    r0, u, r1, v :: str
    r2, r3 :: bool
    r4 :: object
    r5 :: str
    r6, r7 :: object
    r8 :: None
    r9 :: bool
    r10 :: None
L0:
    r0 = unicode_1 :: static  ('a')
    inc_ref r0
    u = r0
L1:
    if b goto L10 else goto L11 :: bool
L2:
    r1 = unicode_2 :: static  ('b')
    inc_ref r1
    v = r1
    r2 = v is u
    r3 = !r2
    if r3 goto L11 else goto L1 :: bool
L3:
    r4 = builtins :: module
    r5 = unicode_3 :: static  ('print')
    r6 = getattr r4, r5
    if is_error(r6) goto L12 (error at f:7) else goto L4
L4:
    if is_error(v) goto L13 else goto L7
L5:
    raise UnboundLocalError("local variable 'v' referenced before assignment")
    if not r9 goto L9 (error at f:7) else goto L6 :: bool
L6:
    unreachable
L7:
    r7 = py_call(r6, v)
    dec_ref r6
    xdec_ref v
    if is_error(r7) goto L9 (error at f:7) else goto L14
L8:
    r8 = None
    return r8
L9:
    r10 = <error> :: None
    return r10
L10:
    xdec_ref v
    goto L2
L11:
    dec_ref u
    goto L3
L12:
    xdec_ref v
    goto L9
L13:
    dec_ref r6
    goto L5
L14:
    dec_ref r7
    goto L8