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https://github.com/Mercury-Language/mercury.git
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fdd141bf77
tests/invalid/*.{m,err_exp}:
tests/misc_tests/*.m:
tests/mmc_make/*.m:
tests/par_conj/*.m:
tests/purity/*.m:
tests/stm/*.m:
tests/string_format/*.m:
tests/structure_reuse/*.m:
tests/submodules/*.m:
tests/tabling/*.m:
tests/term/*.m:
tests/trailing/*.m:
tests/typeclasses/*.m:
tests/valid/*.m:
tests/warnings/*.{m,exp}:
Make these tests use four-space indentation, and ensure that
each module is imported on its own line. (I intend to use the latter
to figure out which subdirectories' tests can be executed in parallel.)
These changes usually move code to different lines. For the tests
that check compiler error messages, expect the new line numbers.
browser/cterm.m:
browser/tree234_cc.m:
Import only one module per line.
tests/hard_coded/boyer.m:
Fix something I missed.
36 lines
720 B
Mathematica
36 lines
720 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module associative.
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:- interface.
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:- type expr
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---> base
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; op(expr, expr).
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:- pred normal_form(expr, expr).
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:- mode normal_form(in, out) is det.
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:- implementation.
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normal_form(F, N) :-
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( rewrite(F, F1) ->
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normal_form(F1, N)
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;
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N = F
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).
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:- pred rewrite(expr, expr).
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:- mode rewrite(in, out) is semidet.
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rewrite(In, Out) :-
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( In = op(op(A, B), C) ->
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Out = op(A, op(B, C))
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;
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In = op(A, op(B, C)),
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Out = op(A, L),
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rewrite(op(B, C), L)
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).
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