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Diffstat (limited to 'gen/order.erl')
-rw-r--r-- | gen/order.erl | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/gen/order.erl b/gen/order.erl deleted file mode 100644 index 92e6f13..0000000 --- a/gen/order.erl +++ /dev/null @@ -1,127 +0,0 @@ --module(order). --compile(no_auto_import). --include_lib("eunit/include/eunit.hrl"). - --export([reverse/1, to_int/1, compare/2, max/2, min/2]). - -reverse(Order) -> - case Order of - lt -> - gt; - - eq -> - eq; - - gt -> - lt - end. - --ifdef(TEST). -reverse_test() -> - expect:equal(reverse(lt), gt), - expect:equal(reverse(eq), eq), - expect:equal(reverse(gt), lt). --endif. - -to_int(Order) -> - case Order of - lt -> - -1; - - eq -> - 0; - - gt -> - 1 - end. - --ifdef(TEST). -to_int_test() -> - expect:equal(to_int(lt), -1), - expect:equal(to_int(eq), 0), - expect:equal(to_int(gt), 1). --endif. - -compare(A, B) -> - case {A, B} of - {lt, lt} -> - eq; - - {lt, _} -> - lt; - - {eq, eq} -> - eq; - - {gt, gt} -> - eq; - - {eq, gt} -> - lt; - - _ -> - gt - end. - --ifdef(TEST). -compare_test() -> - expect:equal(compare(lt, lt), eq), - expect:equal(compare(lt, eq), lt), - expect:equal(compare(lt, gt), lt), - expect:equal(compare(eq, lt), gt), - expect:equal(compare(eq, eq), eq), - expect:equal(compare(eq, gt), lt), - expect:equal(compare(gt, lt), gt), - expect:equal(compare(gt, eq), gt), - expect:equal(compare(gt, gt), eq). --endif. - -max(A, B) -> - case {A, B} of - {gt, _} -> - gt; - - {eq, lt} -> - eq; - - _ -> - B - end. - --ifdef(TEST). -max_test() -> - expect:equal(max(lt, lt), lt), - expect:equal(max(lt, eq), eq), - expect:equal(max(lt, gt), gt), - expect:equal(max(eq, lt), eq), - expect:equal(max(eq, eq), eq), - expect:equal(max(eq, gt), gt), - expect:equal(max(gt, lt), gt), - expect:equal(max(gt, eq), gt), - expect:equal(max(gt, gt), gt). --endif. - -min(A, B) -> - case {A, B} of - {lt, _} -> - lt; - - {eq, gt} -> - eq; - - _ -> - B - end. - --ifdef(TEST). -min_test() -> - expect:equal(min(lt, lt), lt), - expect:equal(min(lt, eq), lt), - expect:equal(min(lt, gt), lt), - expect:equal(min(eq, lt), lt), - expect:equal(min(eq, eq), eq), - expect:equal(min(eq, gt), eq), - expect:equal(min(gt, lt), lt), - expect:equal(min(gt, eq), eq), - expect:equal(min(gt, gt), gt). --endif. |