Files
mercury/compiler/write_module_interface_files.m
Zoltan Somogyi a3546b16c3 Move code to generate interface to comp_unit_interface.m.
compiler/write_module_interface_files.m:
compiler/comp_unit_interface.m:
    Move the predicates that generate the parse trees of interface files
    from write_module_interface_files.m to comp_unit_interface.m.
    Move the types they need with them, and document them.

    Rename the predicates involved to make clear whether they generate
    parse trees, write them out, or both.

    In comp_unit_interface.m keep private the previously exported predicates,
    because their only callers are the moved predicates, so all calls them
    are now local to the module.

compiler/make.get_module_dep_info.m:
compiler/mercury_compile_main.m:
    Conform to the changes above.
2023-10-25 12:35:57 +11:00

537 lines
24 KiB
Mathematica

%---------------------------------------------------------------------------%
% vim: ft=mercury ts=4 sw=4 et
%---------------------------------------------------------------------------%
% Copyright (C) 2014 The Mercury team.
% This file may only be copied under the terms of the GNU General
% Public License - see the file COPYING in the Mercury distribution.
%---------------------------------------------------------------------------%
%
% File: write_module_interface_files.m.
% Main author: fjh (when this code was in modules.m).
%
% This module writes the automatically generated .int3, .int2 and .int files
% (and if needed, the .int0 file) for each Mercury source module.
%
% The interface file system works as follows:
%
% 1. a .int3 file is written, which contains all the types, typeclasses, insts
% and modes defined in the interface. Equivalence types, solver types, insts
% and modes are written in full, others are written in abstract form. These
% are module qualified as far as possible given the information present in the
% current module.
%
% 2. The .int and .int2 files are created, using the .int3 files
% of imported modules to fully module qualify all items.
% The .int2 file is mostly just a fully qualified version of the .int3 file,
% however it also includes some extra information, such as functors for
% discriminated union types, which may be needed for mode analysis.
%
% 3. The .int0 file is similar to the .int file except that it also
% includes declarations (but not clauses) from the implementation section.
% It is generated only for modules that have submodules.
%
% NOTE The above is only a summary, and may be out of date. An attempt
% at an up-to-date and much more detailed description can be found in
% notes/interface_files.html.
%
%---------------------------------------------------------------------------%
%
% The datestamp on the .date3 file gives the last time
% the .int3 file was checked for consistency.
%
% The datestamp on the .date file gives the last time
% the .int and .int2 files were checked for consistency.
%
% The datestamp on the .date0 file gives the last time
% the .int0 file was checked for consistency.
%
%---------------------------------------------------------------------------%
:- module parse_tree.write_module_interface_files.
:- interface.
:- import_module libs.
:- import_module libs.globals.
:- import_module libs.maybe_util.
:- import_module parse_tree.comp_unit_interface.
:- import_module parse_tree.error_spec.
:- import_module parse_tree.module_baggage.
:- import_module parse_tree.read_modules.
:- import_module io.
:- import_module list.
%---------------------------------------------------------------------------%
% write_short_interface_file_int3(ProgressStream, Globals, AddToHptm,
% BurdenedModule, Succeeded, Specs, !HaveParseTreeMaps, !IO):
%
% Output the unqualified short interface file to <module>.int3.
%
% Specs will contain any error and/or warning messages resulting
% - from the process of constructing the contents of the .int3 file,
% - from the process of writing it out, and
% - updating the associated timestamp file.
%
% We bind Succeeded to "succeeded" only if all three of those processes
% succeeded without errors. (Specs may contain warnings even then.)
%
% We add the contents of the .int3 file to !HaveParseTreeMaps if we could
% construct it without any errors, *and* AddToHptm says we should.
%
:- pred generate_and_write_interface_file_int3(io.text_output_stream::in,
globals::in, maybe_add_to_hptm::in, burdened_module::in,
maybe_succeeded::out, list(error_spec)::out,
have_parse_tree_maps::in, have_parse_tree_maps::out,
io::di, io::uo) is det.
% write_private_interface_file_int0(ProgressStream, Globals, AddToHptm,
% BurdenedModule, Succeeded, Specs, !HaveParseTreeMaps, !IO):
%
% Given a burdened_module, output the private (`.int0') interface file
% for the module. (The private interface contains all the declarations
% in the module, including those in the `implementation' section;
% it is used when compiling submodules.)
%
:- pred generate_and_write_interface_file_int0(io.text_output_stream::in,
globals::in, maybe_add_to_hptm::in, burdened_module::in,
maybe_succeeded::out, list(error_spec)::out,
have_parse_tree_maps::in, have_parse_tree_maps::out,
io::di, io::uo) is det.
% write_interface_file_int1_int2(ProgressStream, Globals, AddToHptm,
% BurdenedModule, Succeeded, Specs, !HaveParseTreeMaps, !IO):
%
% Given a burdened_module, output the long (`.int') and short (`.int2')
% interface files for the module.
%
:- pred generate_and_write_interface_file_int1_int2(io.text_output_stream::in,
globals::in, maybe_add_to_hptm::in, burdened_module::in,
maybe_succeeded::out, list(error_spec)::out,
have_parse_tree_maps::in, have_parse_tree_maps::out,
io::di, io::uo) is det.
%---------------------------------------------------------------------------%
%---------------------------------------------------------------------------%
:- implementation.
:- import_module libs.options.
:- import_module libs.timestamp.
:- import_module mdbcomp.
:- import_module mdbcomp.sym_name.
:- import_module parse_tree.file_names.
:- import_module parse_tree.module_cmds.
:- import_module parse_tree.parse_error.
:- import_module parse_tree.parse_tree_out.
:- import_module parse_tree.prog_item.
:- import_module recompilation.
:- import_module recompilation.version.
:- import_module bool.
:- import_module getopt.
:- import_module io.file.
:- import_module maybe.
:- import_module require.
%---------------------------------------------------------------------------%
%
% Write out .int3 files.
%
generate_and_write_interface_file_int3(ProgressStream, Globals, AddToHptm,
BurdenedModule, Succeeded, Specs, !HaveParseTreeMaps, !IO) :-
generate_parse_tree_int3(Globals, AddToHptm,
BurdenedModule, GenerateResult, !HaveParseTreeMaps, !IO),
write_parse_tree_int3(ProgressStream, Globals, GenerateResult,
Specs, Succeeded, !IO).
:- pred write_parse_tree_int3(io.text_output_stream::in, globals::in,
generate_int3_result::in, list(error_spec)::out, maybe_succeeded::out,
io::di, io::uo) is det.
write_parse_tree_int3(ProgressStream, Globals, GenerateResult,
Specs, Succeeded, !IO) :-
(
GenerateResult = gpti3_ok(ParseTreeInt3, FileName, TmpFileName, Specs),
ModuleName = ParseTreeInt3 ^ pti3_module_name,
actually_write_interface_file3(ProgressStream, Globals, ParseTreeInt3,
FileName, TmpFileName, no, OutputSucceeded, !IO),
touch_module_ext_datestamp(Globals, ProgressStream, ModuleName,
ext_cur_ngs(ext_cur_ngs_int_date_int3), TouchSucceeded, !IO),
Succeeded = OutputSucceeded `and` TouchSucceeded
;
GenerateResult = gpti3_error(ModuleName, PrefixPieces, GenerateSpecs),
ExtInt3 = ext_cur_ngs(ext_cur_ngs_int_int3),
ExtDate3 = ext_cur_ngs(ext_cur_ngs_int_date_int3),
report_file_not_written(Globals, PrefixPieces, ModuleName,
ExtInt3, no, ExtDate3, GenerateSpecs, Specs, !IO),
Succeeded = did_not_succeed
).
%---------------------------------------------------------------------------%
%
% Write out .int0 files.
%
generate_and_write_interface_file_int0(ProgressStream, Globals, AddToHptm,
BurdenedModule, Succeeded, Specs, !HaveParseTreeMaps, !IO) :-
generate_parse_tree_int0(ProgressStream, Globals, AddToHptm,
BurdenedModule, GenerateResult, !HaveParseTreeMaps, !IO),
write_parse_tree_int0(ProgressStream, Globals, GenerateResult,
Specs, Succeeded, !IO).
:- pred write_parse_tree_int0(io.text_output_stream::in, globals::in,
generate_int0_result::in, list(error_spec)::out, maybe_succeeded::out,
io::di, io::uo) is det.
write_parse_tree_int0(ProgressStream, Globals, GenerateResult,
Specs, Succeeded, !IO) :-
(
GenerateResult = gpti0_ok(ParseTreeInt0, MaybeTimestamp,
FileName, TmpFileName, Specs),
ModuleName = ParseTreeInt0 ^ pti0_module_name,
actually_write_interface_file0(ProgressStream, Globals, ParseTreeInt0,
FileName, TmpFileName, MaybeTimestamp, OutputSucceeded, !IO),
touch_module_ext_datestamp(Globals, ProgressStream, ModuleName,
ext_cur_ngs(ext_cur_ngs_int_date_int0), TouchSucceeded, !IO),
Succeeded = OutputSucceeded `and` TouchSucceeded
;
GenerateResult = gpti0_error(ModuleName, PrefixPieces, GenerateSpecs),
ExtInt0 = ext_cur_ngs(ext_cur_ngs_int_int0),
ExtDate0 = ext_cur_ngs(ext_cur_ngs_int_date_int0),
report_file_not_written(Globals, PrefixPieces, ModuleName,
ExtInt0, no, ExtDate0, GenerateSpecs, Specs, !IO),
Succeeded = did_not_succeed
).
%---------------------------------------------------------------------------%
%
% Write out .int and .int2 files.
%
generate_and_write_interface_file_int1_int2(ProgressStream, Globals, AddToHptm,
BurdenedModule, Succeeded, Specs, !HaveParseTreeMaps, !IO) :-
generate_parse_tree_int12(ProgressStream, Globals, AddToHptm,
BurdenedModule, GenerateResult, !HaveParseTreeMaps, !IO),
write_parse_tree_int12(ProgressStream, Globals, GenerateResult,
Specs, Succeeded, !IO).
:- pred write_parse_tree_int12(io.text_output_stream::in, globals::in,
generate_int12_result::in, list(error_spec)::out, maybe_succeeded::out,
io::di, io::uo) is det.
write_parse_tree_int12(ProgressStream, Globals, GenerateResult,
Specs, Succeeded, !IO) :-
(
GenerateResult = gpti12_ok(ParseTreeInt1, ParseTreeInt2,
MaybeTimestamp, FileName1, TmpFileName1, FileName2, TmpFileName2,
Specs),
ModuleName = ParseTreeInt1 ^ pti1_module_name,
actually_write_interface_file1(ProgressStream, Globals,
ParseTreeInt1, FileName1, TmpFileName1, MaybeTimestamp,
OutputSucceeded1, !IO),
actually_write_interface_file2(ProgressStream, Globals,
ParseTreeInt2, FileName2, TmpFileName2, MaybeTimestamp,
OutputSucceeded2, !IO),
touch_module_ext_datestamp(Globals, ProgressStream, ModuleName,
ext_cur_ngs(ext_cur_ngs_int_date_int12), TouchSucceeded, !IO),
Succeeded = OutputSucceeded1 `and` OutputSucceeded2 `and`
TouchSucceeded
;
GenerateResult = gpti12_error(ModuleName, PrefixPieces, GenerateSpecs),
ExtInt1 = ext_cur_ngs(ext_cur_ngs_int_int1),
ExtInt2 = ext_cur_ngs(ext_cur_ngs_int_int2),
ExtDate12 = ext_cur_ngs(ext_cur_ngs_int_date_int12),
report_file_not_written(Globals, PrefixPieces, ModuleName,
ExtInt1, yes(ExtInt2), ExtDate12, GenerateSpecs, Specs, !IO),
Succeeded = did_not_succeed
).
%---------------------------------------------------------------------------%
:- pred actually_write_interface_file0(io.text_output_stream::in, globals::in,
parse_tree_int0::in, string::in, string::in, maybe(timestamp)::in,
maybe_succeeded::out, io::di, io::uo) is det.
actually_write_interface_file0(ProgressStream, Globals, ParseTreeInt0,
FileName, TmpFileName, MaybeTimestamp, Succeeded, !IO) :-
disable_all_line_numbers(Globals, NoLineNumGlobals),
% We handle any failure to read in the old interface version as
% every item in the module source being brand new.
maybe_read_old_int0_and_compare_for_smart_recomp(ProgressStream,
NoLineNumGlobals, ParseTreeInt0, MaybeTimestamp,
MaybeVersionNumbers, !IO),
ParseTreeInt0V = ParseTreeInt0 ^ pti0_maybe_version_numbers
:= MaybeVersionNumbers,
output_parse_tree_int0(ProgressStream, NoLineNumGlobals,
TmpFileName, ParseTreeInt0V, OutputSucceeded, !IO),
copy_dot_tmp_to_base_file_report_any_error(ProgressStream, Globals,
".int0", FileName, UpdateSucceeded, !IO),
Succeeded = OutputSucceeded `and` UpdateSucceeded.
:- pred actually_write_interface_file1(io.text_output_stream::in, globals::in,
parse_tree_int1::in, string::in, string::in, maybe(timestamp)::in,
maybe_succeeded::out, io::di, io::uo) is det.
actually_write_interface_file1(ProgressStream, Globals, ParseTreeInt1,
FileName, TmpFileName, MaybeTimestamp, Succeeded, !IO) :-
disable_all_line_numbers(Globals, NoLineNumGlobals),
% We handle any failure to read in the old interface version as
% every item in the module source being brand new.
maybe_read_old_int1_and_compare_for_smart_recomp(ProgressStream,
NoLineNumGlobals, ParseTreeInt1, MaybeTimestamp,
MaybeVersionNumbers, !IO),
ParseTreeInt1V = ParseTreeInt1 ^ pti1_maybe_version_numbers
:= MaybeVersionNumbers,
output_parse_tree_int1(ProgressStream, NoLineNumGlobals,
TmpFileName, ParseTreeInt1V, OutputSucceeded, !IO),
copy_dot_tmp_to_base_file_report_any_error(ProgressStream, Globals,
".int", FileName, UpdateSucceeded, !IO),
Succeeded = OutputSucceeded `and` UpdateSucceeded.
:- pred actually_write_interface_file2(io.text_output_stream::in, globals::in,
parse_tree_int2::in, string::in, string::in, maybe(timestamp)::in,
maybe_succeeded::out, io::di, io::uo) is det.
actually_write_interface_file2(ProgressStream, Globals, ParseTreeInt2,
FileName, TmpFileName, MaybeTimestamp, Succeeded, !IO) :-
disable_all_line_numbers(Globals, NoLineNumGlobals),
maybe_read_old_int2_and_compare_for_smart_recomp(ProgressStream,
NoLineNumGlobals, ParseTreeInt2, MaybeTimestamp,
MaybeVersionNumbers, !IO),
ParseTreeInt2V = ParseTreeInt2 ^ pti2_maybe_version_numbers
:= MaybeVersionNumbers,
output_parse_tree_int2(ProgressStream, NoLineNumGlobals,
TmpFileName, ParseTreeInt2V, OutputSucceeded, !IO),
copy_dot_tmp_to_base_file_report_any_error(ProgressStream, Globals,
".int2", FileName, UpdateSucceeded, !IO),
Succeeded = OutputSucceeded `and` UpdateSucceeded.
:- pred actually_write_interface_file3(io.text_output_stream::in, globals::in,
parse_tree_int3::in, string::in, string::in, maybe(timestamp)::in,
maybe_succeeded::out, io::di, io::uo) is det.
actually_write_interface_file3(ProgressStream, Globals, ParseTreeInt3,
FileName, TmpFileName, _MaybeTimestamp, Succeeded, !IO) :-
disable_all_line_numbers(Globals, NoLineNumGlobals),
output_parse_tree_int3(ProgressStream, NoLineNumGlobals,
TmpFileName, ParseTreeInt3, OutputSucceeded, !IO),
copy_dot_tmp_to_base_file_report_any_error(ProgressStream, Globals,
".int3", FileName, UpdateSucceeded, !IO),
Succeeded = OutputSucceeded `and` UpdateSucceeded.
%---------------------------------------------------------------------------%
:- pred disable_all_line_numbers(globals::in, globals::out) is det.
disable_all_line_numbers(Globals, NoLineNumGlobals) :-
globals.set_option(line_numbers, bool(no),
Globals, NoLineNumGlobals0),
globals.set_option(line_numbers_around_foreign_code, bool(no),
NoLineNumGlobals0, NoLineNumGlobals).
%---------------------------------------------------------------------------%
:- pred maybe_read_old_int0_and_compare_for_smart_recomp(
io.text_output_stream::in, globals::in, parse_tree_int0::in,
maybe(timestamp)::in, maybe_version_numbers::out, io::di, io::uo) is det.
maybe_read_old_int0_and_compare_for_smart_recomp(ProgressStream,
NoLineNumGlobals, ParseTreeInt0, MaybeTimestamp,
MaybeVersionNumbers, !IO) :-
should_generate_item_version_numbers(NoLineNumGlobals,
WantVersionNumbers, !IO),
(
WantVersionNumbers = generate_version_numbers,
ModuleName = ParseTreeInt0 ^ pti0_module_name,
% Find the timestamp of the current module.
insist_on_timestamp(MaybeTimestamp, Timestamp),
% Read in the previous version of the file.
read_module_int0(ProgressStream, NoLineNumGlobals,
rrm_old, ignore_errors, do_search, ModuleName,
always_read_module(dont_return_timestamp), HaveReadInt0, !IO),
(
HaveReadInt0 = have_module(_FN, OldParseTreeInt0, Source),
have_parse_tree_source_get_maybe_timestamp_errors(Source,
_, OldModuleErrors),
( if there_are_no_errors(OldModuleErrors) then
MaybeOldParseTreeInt0 = yes(OldParseTreeInt0)
else
% If we can't read in the old file, the timestamps will
% all be set to the modification time of the source file.
MaybeOldParseTreeInt0 = no
)
;
HaveReadInt0 = have_not_read_module(_, _),
MaybeOldParseTreeInt0 = no
),
recompilation.version.compute_version_numbers_int0(
MaybeOldParseTreeInt0, Timestamp, ParseTreeInt0, VersionNumbers),
MaybeVersionNumbers = version_numbers(VersionNumbers)
;
WantVersionNumbers = do_not_generate_version_numbers,
MaybeVersionNumbers = no_version_numbers
).
:- pred maybe_read_old_int1_and_compare_for_smart_recomp(
io.text_output_stream::in, globals::in, parse_tree_int1::in,
maybe(timestamp)::in, maybe_version_numbers::out, io::di, io::uo) is det.
maybe_read_old_int1_and_compare_for_smart_recomp(ProgressStream,
NoLineNumGlobals, ParseTreeInt1, MaybeTimestamp,
MaybeVersionNumbers, !IO) :-
should_generate_item_version_numbers(NoLineNumGlobals,
WantVersionNumbers, !IO),
(
WantVersionNumbers = generate_version_numbers,
ModuleName = ParseTreeInt1 ^ pti1_module_name,
% Find the timestamp of the current module.
insist_on_timestamp(MaybeTimestamp, Timestamp),
% Read in the previous version of the file.
read_module_int1(ProgressStream, NoLineNumGlobals,
rrm_old, ignore_errors, do_search, ModuleName,
always_read_module(dont_return_timestamp), HaveReadInt1, !IO),
(
HaveReadInt1 = have_module(_FN, OldParseTreeInt1, Source),
have_parse_tree_source_get_maybe_timestamp_errors(Source,
_, OldModuleErrors),
( if there_are_no_errors(OldModuleErrors) then
MaybeOldParseTreeInt1 = yes(OldParseTreeInt1)
else
% If we can't read in the old file, the timestamps will
% all be set to the modification time of the source file.
MaybeOldParseTreeInt1 = no
)
;
HaveReadInt1 = have_not_read_module(_, _),
MaybeOldParseTreeInt1 = no
),
recompilation.version.compute_version_numbers_int1(
MaybeOldParseTreeInt1, Timestamp, ParseTreeInt1, VersionNumbers),
MaybeVersionNumbers = version_numbers(VersionNumbers)
;
WantVersionNumbers = do_not_generate_version_numbers,
MaybeVersionNumbers = no_version_numbers
).
:- pred maybe_read_old_int2_and_compare_for_smart_recomp(
io.text_output_stream::in, globals::in, parse_tree_int2::in,
maybe(timestamp)::in, maybe_version_numbers::out, io::di, io::uo) is det.
maybe_read_old_int2_and_compare_for_smart_recomp(ProgressStream,
NoLineNumGlobals, ParseTreeInt2, MaybeTimestamp,
MaybeVersionNumbers, !IO) :-
should_generate_item_version_numbers(NoLineNumGlobals,
WantVersionNumbers, !IO),
(
WantVersionNumbers = generate_version_numbers,
ModuleName = ParseTreeInt2 ^ pti2_module_name,
% Find the timestamp of the current module.
insist_on_timestamp(MaybeTimestamp, Timestamp),
% Read in the previous version of the file.
read_module_int2(ProgressStream, NoLineNumGlobals,
rrm_old, ignore_errors, do_search, ModuleName,
always_read_module(dont_return_timestamp), HaveReadInt2, !IO),
(
HaveReadInt2 = have_module(_FN, OldParseTreeInt2, Source),
have_parse_tree_source_get_maybe_timestamp_errors(Source,
_, OldModuleErrors),
( if there_are_no_errors(OldModuleErrors) then
MaybeOldParseTreeInt2 = yes(OldParseTreeInt2)
else
% If we can't read in the old file, the timestamps will
% all be set to the modification time of the source file.
MaybeOldParseTreeInt2 = no
)
;
HaveReadInt2 = have_not_read_module(_, _),
MaybeOldParseTreeInt2 = no
),
recompilation.version.compute_version_numbers_int2(
MaybeOldParseTreeInt2, Timestamp, ParseTreeInt2, VersionNumbers),
MaybeVersionNumbers = version_numbers(VersionNumbers)
;
WantVersionNumbers = do_not_generate_version_numbers,
MaybeVersionNumbers = no_version_numbers
).
%---------------------------------------------------------------------------%
:- type maybe_generate_version_numbers
---> do_not_generate_version_numbers
; generate_version_numbers.
:- pred should_generate_item_version_numbers(globals::in,
maybe_generate_version_numbers::out, io::di, io::uo) is det.
should_generate_item_version_numbers(Globals, ShouldGenVersionNumbers, !IO) :-
globals.lookup_bool_option(Globals, generate_item_version_numbers,
GenerateVersionNumbers),
io_get_disable_generate_item_version_numbers(DisableVersionNumbers, !IO),
( if
GenerateVersionNumbers = yes,
DisableVersionNumbers = do_not_disable_item_version_numbers
then
ShouldGenVersionNumbers = generate_version_numbers
else
ShouldGenVersionNumbers = do_not_generate_version_numbers
).
:- pred insist_on_timestamp(maybe(timestamp)::in, timestamp::out) is det.
insist_on_timestamp(MaybeTimestamp, Timestamp) :-
% Find the timestamp of the current module.
(
MaybeTimestamp = no,
unexpected($pred, "timestamp not read with `--smart-recompilation'")
;
MaybeTimestamp = yes(Timestamp)
).
%---------------------------------------------------------------------------%
:- pred report_file_not_written(globals::in, list(format_piece)::in,
module_name::in, ext::in, maybe(ext)::in, ext::in,
list(error_spec)::in, list(error_spec)::out, io::di, io::uo) is det.
report_file_not_written(Globals, PrefixPieces, ModuleName,
ExtA, MaybeExtB, ExtDate, Specs0, Specs, !IO) :-
% We use write_error_spec to print the message the interface file or
% files not being written in order to wrap the message if it is
% longer than the line length.
module_name_to_file_name(Globals, $pred,
ExtA, ModuleName, IntAFileName),
module_name_to_file_name(Globals, $pred,
ExtDate, ModuleName, DateFileName),
(
MaybeExtB = no,
NotWrittenPieces = [quote(IntAFileName), words("not written."), nl],
ToRemoveFileNames = [IntAFileName, DateFileName]
;
MaybeExtB = yes(ExtB),
module_name_to_file_name(Globals, $pred,
ExtB, ModuleName, IntBFileName),
NotWrittenPieces = [quote(IntAFileName), words("and"),
quote(IntBFileName), words("not written."), nl],
ToRemoveFileNames = [IntAFileName, IntBFileName, DateFileName]
),
ModuleNameStr = sym_name_to_string(ModuleName),
InvisPiece = invis_order_default_end(0, ModuleNameStr),
NotWrittenSpec = simplest_no_context_spec($pred, severity_informational,
phase_make_int, [InvisPiece | PrefixPieces] ++ NotWrittenPieces),
Specs = [NotWrittenSpec | Specs0],
% We remove the interface file(s) the errors prevented us from generating,
% as well as the file indicating when they were last successfully written,
% for the same reason: to prevent any previous versions of those files
% being used in other compilations despite the fact that they are now
% out-of-date. If we did not do this, compilations that read in the
% now-obsolete interface files could generate error messages about
% errors that do not now exist in the source files at all.
list.map_foldl(io.file.remove_file,
ToRemoveFileNames, _RemoveResults, !IO).
%---------------------------------------------------------------------------%
:- end_module parse_tree.write_module_interface_files.
%---------------------------------------------------------------------------%