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0a9fafcfa7
Estimated hours taken: 0.1 compiler/prog_out.m: Fix a "the The" in a comment introduced by my previous change.
365 lines
10 KiB
Mathematica
365 lines
10 KiB
Mathematica
%-----------------------------------------------------------------------------%
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% Copyright (C) 1993-1997 The University of Melbourne.
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% This file may only be copied under the terms of the GNU General
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% Public License - see the file COPYING in the Mercury distribution.
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%-----------------------------------------------------------------------------%
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:- module prog_out.
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% Main author: fjh.
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% This module defines some predicates which output various parts
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% of the parse tree created by prog_io.
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% WARNING - this module is mostly junk at the moment!
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% Only the first hundred lines or so are meaningful.
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%-----------------------------------------------------------------------------%
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%-----------------------------------------------------------------------------%
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:- interface.
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:- import_module prog_data, io, term.
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:- pred prog_out__write_messages(message_list, io__state, io__state).
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:- mode prog_out__write_messages(in, di, uo) is det.
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:- pred prog_out__write_context(term__context, io__state, io__state).
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:- mode prog_out__write_context(in, di, uo) is det.
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:- pred prog_out__write_sym_name(sym_name, io__state, io__state).
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:- mode prog_out__write_sym_name(in, di, uo) is det.
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:- pred prog_out__write_module_spec(module_specifier, io__state, io__state).
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:- mode prog_out__write_module_spec(in, di, uo) is det.
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:- pred prog_out__write_module_list(list(module_name), io__state, io__state).
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:- mode prog_out__write_module_list(in, di, uo) is det.
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%-----------------------------------------------------------------------------%
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%-----------------------------------------------------------------------------%
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:- implementation.
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:- import_module require, string, list, varset, std_util, term_io.
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%-----------------------------------------------------------------------------%
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%-----------------------------------------------------------------------------%
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% write out the list of error/warning messages which is
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% returned when a module is parsed.
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prog_out__write_messages([]) --> [].
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prog_out__write_messages([Message | Messages]) -->
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prog_out__write_message(Message),
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prog_out__write_messages(Messages).
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:- pred prog_out__write_message(pair(string, term), io__state, io__state).
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:- mode prog_out__write_message(in, di, uo) is det.
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prog_out__write_message(Msg - Term) -->
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(
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{ Term = term__functor(_Functor, _Args, Context) }
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->
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prog_out__write_context(Context)
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;
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[]
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),
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io__write_string(Msg),
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(
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{ Term = term__functor(term__atom(""), [], _Context2) }
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->
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io__write_string(".\n")
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;
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io__write_string(": "),
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{ varset__init(VarSet) }, % XXX variable names in error messages
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term_io__write_term_nl(VarSet, Term)
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).
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%-----------------------------------------------------------------------------%
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% Write out the information in term context (at the moment, just
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% the line number) in a form suitable for the beginning of an
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% error message.
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prog_out__write_context(Context) -->
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{ term__context_file(Context, FileName) },
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{ term__context_line(Context, LineNumber) },
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( { FileName = "" } ->
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[]
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;
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{ string__format("%s:%03d: ", [s(FileName), i(LineNumber)],
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ContextMessage) },
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io__write_string(ContextMessage)
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).
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%-----------------------------------------------------------------------------%
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% write out a (possibly qualified) symbol name
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prog_out__write_sym_name(qualified(ModuleSpec,Name)) -->
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prog_out__write_module_spec(ModuleSpec),
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io__write_string(":"),
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io__write_string(Name).
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prog_out__write_sym_name(unqualified(Name)) -->
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io__write_string(Name).
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% write out a module specifier
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prog_out__write_module_spec(ModuleSpec) -->
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io__write_string(ModuleSpec).
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%-----------------------------------------------------------------------------%
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prog_out__write_module_list([Import1, Import2, Import3 | Imports]) -->
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io__write_strings(["`", Import1, "', "]),
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write_module_list([Import2, Import3 | Imports]).
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prog_out__write_module_list([Import1, Import2]) -->
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io__write_strings(["`", Import1, "' and `", Import2 ,"'"]).
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prog_out__write_module_list([Import]) -->
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io__write_strings(["`", Import, "'"]).
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prog_out__write_module_list([]) -->
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{ error("prog_out__write_module_list") }.
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%-----------------------------------------------------------------------------%
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%-----------------------------------------------------------------------------%
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% THE REMAINDER OF THIS FILE IS JUNK THAT IS NOT USED.
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% It has been made obsolete by mercury_to_mercury.m.
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% However, the code below handles operator precedence better
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% than mercury_to_mercury.m.
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/**************************
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% Please note that this code is the property of
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% the University of Melbourne and is Copyright 1985, 1986, 1987, 1988 by it.
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%
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% All rights are reserved.
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%
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% Author: Philip Dart, 1988
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% Based on a theme by Lawrence Byrd and Lee Naish.
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% Fixed again by Lee Naish 9/88
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% May bear some vague resemblance to some code written by Lawrence Byrd
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% at Edinburgh a long time ago.
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prog_out__writeDCGClause(Head, Body, VarSet) -->
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% prog_out__get_op_prec("-->", 1, Prec),
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{ Prec = 1199 },
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prog_out__qwrite(Prec, VarSet, Head),
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io__write_string(" -->"),
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prog_out__write_goal(Body, 1, ',', VarSet).
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:- type context ---> '(' ; (';') ; (then) ; (else) ; ','.
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:- pred prog_out__write_goal(goal, int, context, varset, io__state, io__state).
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:- mode prog_out__write_goal(in, in, in, in, di, uo) is det.
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prog_out__write_goal(fail, I0, T, _VarSet) -->
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prog_out__beforelit(T, I0),
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io__write_string("fail").
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prog_out__write_goal(true, I0, T, _VarSet) -->
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prog_out__beforelit(T, I0),
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io__write_string("true").
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prog_out__write_goal(some(Vars,Goal), I0, T, VarSet) -->
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prog_out__beforelit(T, I0),
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io__write_string("some ["),
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prog_out__write_var_list(Vars, VarSet),
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io__write_string("] ("),
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{ I1 is I0 + 1 },
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prog_out__write_goal(Goal, I1, '(', VarSet),
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io__write_string("\n"),
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prog_out__indent(I0),
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io__write_string(")").
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prog_out__write_goal(all(Vars,Goal), I0, T, VarSet) -->
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prog_out__beforelit(T, I0),
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io__write_string("all ["),
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prog_out__write_var_list(Vars, VarSet),
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io__write_string("] ("),
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{ I1 is I0 + 1 },
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prog_out__write_goal(Goal, I1, '(', VarSet),
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io__write_string("\n"),
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prog_out__indent(I0),
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io__write_string(")").
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prog_out__write_goal((P, Q), I0, T, VarSet) -->
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prog_out__write_goal(P, I0, T, VarSet),
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io__write_string(","),
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{if T = (',') then I = I0 else I is I0 + 1},
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prog_out__write_goal(Q, I, (','), VarSet).
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prog_out__write_goal(if_then_else(Vars,C,A,B), I, T, VarSet) -->
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{if T = (then) then I1 is I + 1 else I1 = I},
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(if {T = (else)} then
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[]
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else
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io__write_string("\n"),
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prog_out__indent(I1)
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),
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io__write_string(" if "),
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prog_out__write_some_vars(VarSet, Vars),
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prog_out__write_goal(C, I, '(', VarSet),
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io__write_string(" then"),
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prog_out__write_goal(A, I1, (then), VarSet),
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io__write_string("\n"),
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prog_out__indent(I1),
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io__write_string("else"),
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prog_out__write_goal(B, I1, (else), VarSet),
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(if {T = (else)} then
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[]
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else
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io__write_string("\n"),
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prog_out__indent(I1),
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io__write_string(")")
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).
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prog_out__write_goal(if_then(Vars,C,A), I, T, VarSet) -->
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{if T = (then) then I1 is I + 1 else I1 = I},
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(if {T = (else)} then
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[]
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else
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io__write_string("\n"),
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prog_out__indent(I1)
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),
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io__write_string(" if "),
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prog_out__write_some_vars(VarSet, Vars),
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prog_out__write_goal(C, I, '(', VarSet),
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io__write_string(" then"),
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prog_out__write_goal(A, I1, (then), VarSet),
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(if {T = (else)} then
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[]
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else
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io__write_string("\n"),
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prog_out__indent(I1),
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io__write_string(")")
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).
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prog_out__write_goal((P ; Q), I, T, VarSet) -->
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(if {T = (;)} then
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io__write_string("\t\n"),
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prog_out__write_goal(P, I, (;), VarSet)
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else
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io__write_string("\n"),
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prog_out__indent(I),
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io__write_string("("),
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prog_out__write_goal(P, I, '(', VarSet)
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),
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io__write_string("\n"),
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prog_out__indent(I),
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io__write_string(";"),
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prog_out__write_goal(Q, I, (;), VarSet),
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(if {T = (;)} then
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[]
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else
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io__write_string("\n"),
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prog_out__indent(I),
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io__write_string(")")
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).
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prog_out__write_goal(not(A), I, _, VarSet) -->
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io__write_string("not("),
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prog_out__write_goal(A, I, '(', VarSet),
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io__write_string(")").
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prog_out__write_goal(call(X), I, T, VarSet) -->
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prog_out__beforelit(T, I),
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% Pos 1 of (,) has lowest prec of constructs
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% prog_out__get_op_prec(",", 1, Prec),
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{ Prec = 999 },
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prog_out__qwrite(Prec, VarSet, X).
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prog_out__write_var_list(_VarSet, Vars) -->
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io__write_anything(Vars).
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prog_out__write_some_vars(_VarSet, Vars) -->
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io__write_string("some "),
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io__write_anything(Vars). % XXX
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:- pred prog_out__beforelit(context, int, io__state, io__state).
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:- mode prog_out__beforelit(in, in, di, uo) is det.
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prog_out__beforelit('(', _) -->
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io__write_string("\t").
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prog_out__beforelit((;), I) -->
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io__write_string("\n"),
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{ I1 is I + 1 },
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prog_out__indent(I1),
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io__write_string("\t").
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prog_out__beforelit((then), I) -->
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io__write_string("\n"),
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{ I1 is I + 1 },
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prog_out__indent(I1).
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prog_out__beforelit((else), I) -->
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io__write_string("\n"),
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{ I1 is I + 1 },
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prog_out__indent(I1).
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prog_out__beforelit(',', I) -->
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io__write_string("\n"),
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prog_out__indent(I).
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:- pred prog_out__indent(int, io__state, io__state).
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:- mode prog_out__indent(int, di, uo) is det.
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prog_out__indent(N) -->
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(if {N > 0} then
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io__write_string("\t"),
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{ N1 is N - 1 },
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prog_out__indent(N1)
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else
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[]
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).
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:- pred prog_out__qwrite(int, varset, term, io__state, io__state).
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:- mode prog_out__qwrite(in, in, in, di, uo) is det.
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% XXX problems with precedence
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prog_out__qwrite(_Prec, VarSet, X) -->
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term_io__write_term(VarSet, X).
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:- pred prog_out__get_op_prec(string, int, int, io__state, io__state).
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:- mode prog_out__get_op_prec(in, in, out, di, uo) is det.
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prog_out__get_op_prec(Op, Pos, Prec) -->
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term_io__current_ops(Ops),
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{ get_prec_and_type(Op, Ops, Prec1, Type),
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prog_out__op_adj(Pos, Type, Adj),
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Prec is Prec1 - Adj
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}.
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get_prec_and_type(ThisOp, [Op|Ops], Prec, Type) :-
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(if some [Prec1, Type1]
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Op = op(Prec1, Type1, ThisOp)
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then
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Prec = Prec1,
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Type = Type1
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else
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get_prec_and_type(ThisOp, Ops, Prec, Type)
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).
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:- pred prog_out__op_adj(int, op_type, int).
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:- mode prog_out__op_adj(in, in, out) is det.
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prog_out__op_adj(1, xfx, 1).
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prog_out__op_adj(1, xfy, 1).
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prog_out__op_adj(1, fxy, 1).
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prog_out__op_adj(1, fxx, 1).
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prog_out__op_adj(1, yfx, 0).
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% prog_out__op_adj(1, yfy, 0).
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prog_out__op_adj(1, fyx, 0).
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prog_out__op_adj(1, fyy, 0).
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prog_out__op_adj(2, xfx, 1).
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prog_out__op_adj(2, xfy, 0).
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prog_out__op_adj(2, fxy, 0).
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prog_out__op_adj(2, fxx, 1).
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prog_out__op_adj(2, yfx, 1).
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% prog_out__op_adj(2, yfy, 0).
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prog_out__op_adj(2, fyx, 1).
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prog_out__op_adj(2, fyy, 0).
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prog_out__op_adj(1, xf, 1).
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prog_out__op_adj(1, fx, 1).
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prog_out__op_adj(1, yf, 0).
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prog_out__op_adj(1, fy, 0).
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******************************/
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