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Improve the error messages generated for determinism errors involving committed
choice contexts. Previously, we printed a message to the effect that e.g.
a cc pred is called in context that requires all solutions, but we didn't say
*why* the context requires all solutions. We now keep track of all the goals
to the right that could fail, since it is these goals that may reject the first
solution of a committed choice goal.
The motivation for this diff was the fact that I found that locating the
failing goal can be very difficult if the conjunction to the right is
a couple of hundred lines long. This would have been a nontrivial problem,
since (a) unifications involving values of user-defined types are committed
choice goals, and (b) we can expect uses of user-defined types to increase.
compiler/det_analysis.m:
Keep track of goals to the right of the current goal that could fail,
and include them in the error representation if required.
compiler/det_report.m:
Include the list of failing goals to the right in the representations
of determinism errors involving committed committed choice goals.
Convert the last part of this module that wasn't using error_util
to use error_util. Make most parts of this module just construct
error message specifications; print those specifications (using
error_util) in only a few places.
compiler/hlds_out.m:
Add a function for use by the new code in det_report.m.
compiler/error_util.m:
Add a function for use by the new code in det_report.m.
compiler/error_util.m:
compiler/compiler_util.m:
Error_util is still changing reasonably often, and yet it is
included in lots of modules, most of which need only a few simple
non-parse-tree-related predicates from it (e.g. unexpected).
Move those predicates to a new module, compiler_util.m. This also
eliminates some undesirable dependencies from libs to parse_tree.
compiler/libs.m:
Include compiler_util.m.
compiler/notes/compiler_design.html:
Document compiler_util.m, and fix the documentation of some other
modules.
compiler/*.m:
Import compiler_util instead of or in addition to error_util.
To make this easier, consistently use . instead of __ for module
qualifying module names.
tests/invalid/det_errors_cc.{m,err_exp}:
Add this new test case to test the error messages for cc contexts.
tests/invalid/det_errors_deet.{m,err_exp}:
Add this new test case to test the error messages for unifications
inside function symbols.
tests/invalid/Mmakefile:
Add the new test cases.
tests/invalid/det_errors.err_exp:
tests/invalid/magicbox.err_exp:
Change the expected output to conform to the change in det_report.m,
which is now more consistent.
60 lines
1.8 KiB
Mathematica
60 lines
1.8 KiB
Mathematica
%-----------------------------------------------------------------------------%
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% vim: ft=mercury ts=4 sw=4 et
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%-----------------------------------------------------------------------------%
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% Copyright (C) 2002-2005 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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%
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% This package contains the HLDS data structure, together with modules
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% for creating and manipulating it.
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%
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:- module hlds.
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:- interface.
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:- import_module mdbcomp.
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:- import_module parse_tree.
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%-----------------------------------------------------------------------------%
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% The HLDS data structure itself
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:- include_module assertion.
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:- include_module hlds_data.
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:- include_module hlds_goal.
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:- include_module hlds_llds.
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:- include_module hlds_module.
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:- include_module hlds_pred.
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:- include_module inst_graph.
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:- include_module instmap.
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:- include_module special_pred.
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% Modules for creating the HLDS
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:- include_module make_hlds.
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:- include_module make_tags.
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:- include_module quantification.
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:- include_module hhf.
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% Modules for pretty-printing it.
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:- include_module hlds_out.
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% Miscellaneous utilities.
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:- include_module arg_info.
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:- include_module code_model.
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:- include_module goal_form.
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:- include_module goal_util.
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:- include_module hlds_code_util.
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:- include_module hlds_error_util.
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:- include_module passes_aux.
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%-----------------------------------------------------------------------------%
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:- implementation.
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:- import_module libs.
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:- import_module check_hlds. % needed for unify_proc.unify_proc_id, etc
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:- import_module transform_hlds. % needed for term_util, mmc_analysis
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:- end_module hlds.
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%-----------------------------------------------------------------------------%
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