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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.
41 lines
1.4 KiB
Mathematica
41 lines
1.4 KiB
Mathematica
%---------------------------------------------------------------------------%
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% Copyright (C) 2001-2005 The University of Melbourne.
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% This file may only be copied under the terms of the GNU Library General
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% Public License - see the file COPYING.LIB in the Mercury distribution.
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%---------------------------------------------------------------------------%
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% File: mode_robdd.m.
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% Main author: dmo
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% This module contains the package for mode_robbds, data structures built
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% around reduced ordered binary decision diagrams (ROBDDs) to help implement
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% mode checking via constraints.
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:- module mode_robdd.
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:- interface.
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% These modules contain the alternative implementations of mode_robdds.
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% :- include_module r.
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% :- include_module tfr.
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% :- include_module tfer.
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% :- include_module tfeir.
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:- include_module tfeirn.
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% This module allows different alternatives implementations to be compared.
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% :- include_module check.
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:- include_module equiv_vars.
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:- include_module implications.
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% The default implementation of mode_robdd's stores as much information
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% out of the robdd itself as possible, for performance.
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:- import_module mode_robdd.tfeirn.
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:- type mode_robdd(T) == tfeirn(T).
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% You may wish to use this type instead, for comparing to mode_robdd
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% implementations, which can help in debugging.
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% :- import_module mode_robdd__check.
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% :- type mode_robdd(T) == check_robdd(T).
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:- implementation.
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