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Implement reversed(seq) #2644

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Implement reversed(seq) #2644

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f6aadac
Implement `reversed()`
kmr-srbh Apr 9, 2024
169350e
Tests: Add test
kmr-srbh Apr 9, 2024
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Tests: Add test
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@kmr-srbh
kmr-srbh committed Apr 9, 2024
commit 169350e6f77022aa20258d931476d50d2bf170ab
1 change: 1 addition & 0 deletions integration_tests/CMakeLists.txt
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Expand Up @@ -830,6 +830,7 @@ RUN(NAME callback_04 IMPORT_PATH .. LABELS cpython)
RUN(NAME intrinsics_01 LABELS cpython llvm NOFAST) # any
RUN(NAME intrinsics_02 LABELS cpython llvm c) # floordiv
RUN(NAME test_builtin_type LABELS cpython llvm c) # type
RUN(NAME test_builtin_reversed LABELS llvm) # reversed

# lpython decorator
RUN(NAME lpython_decorator_01 LABELS cpython)
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40 changes: 40 additions & 0 deletions integration_tests/test_builtin_reversed.py
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@@ -0,0 +1,40 @@
from lpython import i32, f64


def test_builtin_reversed():
# list of strings
alphabets: list[str] = ["a", "b", "c", "d", "e"]

reversed_alphabets: list[str] = reversed(alphabets)
print(reversed_alphabets)
assert reversed_alphabets == ["e", "d", "c", "b", "a"]

# list of numbers
numbers: list[i32] = [1, 2, 3, 4, 5]

reversed_numbers: list[i32] = reversed(numbers)
print(reversed_numbers)
assert reversed_numbers == [5, 4, 3, 2, 1]

# list returned through function call
alphabet_dictionary: dict[str, i32] = {
"a": 1,
"b": 2,
"c": 3,
"d": 4,
"e": 5,
}
reversed_keys: list[str] = reversed(alphabet_dictionary.keys())
print(reversed_keys)

assert reversed_keys == ["e", "d", "c", "b", "a"]

# list of another object
points: list[tuple[f64, f64]] = [(1.0, 0.0), (2.3, 5.9), (78.1, 23.2)]
reversed_points: list[tuple[f64, f64]] = reversed(points)
print(reversed_points)

assert reversed_points == [(78.1, 23.2), (2.3, 5.9), (1.0, 0.0)]


test_builtin_reversed()