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1e0025b820
This fixes a serious issue as `try' goals are not properly written to .opt files, so when read back would not actually catch any exceptions. Bug #420. At the point where we are to create the .opt file, the pieces of a `try' goal exist in a "pre-transformed" hlds_goal. Teasing apart the pieces to resemble the original `try' goal would be non-trivial. compiler/intermod.m: Do not export any predicate or function with a clause containing a `try' goal. library/exception.m Throw an exception if the dummy predicate `magic_exception_result/1' is ever called. tests/hard_coded/Mercury.options: tests/hard_coded/Mmakefile: tests/hard_coded/intermod_try_goal.exp: tests/hard_coded/intermod_try_goal.m: tests/hard_coded/intermod_try_goal2.m: Add test case. NEWS: Announce change.
31 lines
737 B
Mathematica
31 lines
737 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module intermod_try_goal2.
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:- interface.
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:- import_module io.
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:- pred catcher(pred(io, io), io, io).
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:- mode catcher(pred(di, uo) is det, di, uo) is cc_multi.
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:- implementation.
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:- import_module string.
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% intermod.m must ignore this pragma until `try' goals can be written
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% properly to .opt files.
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%
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:- pragma inline(catcher/3).
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catcher(Pred, !IO) :-
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( try [io(!IO)]
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Pred(!IO)
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then
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true
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catch_any Excp ->
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io.write_string("caught exception: " ++ string(Excp), !IO),
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io.nl(!IO)
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).
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