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69 lines
1.7 KiB
Mathematica
69 lines
1.7 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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% This is a regression test. The compiler on 29 January, 2006 aborted with
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% the message "Software Error: basic_block.m: Unexpected: extend_basic_blocks:
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% fall through mismatch" when invoked with -O0 --optimize-repeat=0
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% --optimize-saved-vars on this file.
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%
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% The contents of this file are an extract from eval.m in the CVS directory
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% benchmarks/progs/icfp2000.
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:- module eval.
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:- interface.
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:- import_module bool.
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:- import_module io.
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:- import_module list.
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:- type token_list == list(token_group).
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:- type token_group
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---> single_token(token)
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; function(token_list)
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; array(token_list).
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:- type token
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---> identifier(string)
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; binder(string)
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; boolean(bool)
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; number(int)
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; string(string).
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:- type code == token_list.
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:- pred interpret(code::in, io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module array.
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:- import_module map.
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:- type value
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---> boolean(bool)
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; int(int)
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; real(float)
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; string(string).
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:- type id == string.
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:- type env == map(id, value).
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:- type stack == list(value).
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interpret(Code, !IO) :-
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initial_setup(Env0, Stack0, !IO),
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interpret(Code, Env0, Stack0, _Env, _Stack, !IO).
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:- pred initial_setup(env::out, stack::out,
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io::di, io::uo) is det.
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initial_setup(Env, [], !IO) :-
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map.init(Env).
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:- pred interpret(code::in, env::in, stack::in,
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env::out, stack::out, io::di, io::uo) is det.
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interpret(_, Env, Stack, Env, Stack, !IO).
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