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Branches: main Add support for `try' goals, syntactic sugar on top of the exception handling predicates in the standard library. The syntax is documented in the reference manual. Currently one of the proposed try parameters, io(!IO), is implemented. Try goals are implemented by *two* source-to-source transformations, one at the parse tree level, then a later one on the HLDS. The reason for this is given in try_expand.m. library/ops.m: Add three new operators: try, catch, catch_any. library/exception.m: Add forwarding predicates so that code generated by the try goal transformation doesn't need to import `univ'. compiler/prog_item.m: Add representations of try goals to parse tree. compiler/prog_io_goal.m: Parse try goals. Unrelated: fix spelling of "parameter". compiler/add_clause.m: Perform the initial transformation on try goals. compiler/hlds_goal.m: Add try goals to HLDS, as shorthand goals. compiler/try_expand.m: New module to perform the latter transformation on try goals. compiler/check_hlds.m: Import the new module. compiler/mercury_compile.m: Call the try_expand pass near the end of the front-end pass. compiler/module_imports.m: Implicitly import `exception' if a `try' goal is seen. compiler/det_analysis.m: Conform to addition of try goals in HLDS. Make it not wrap a commit scope around the intermediate try goal (as it might if there are no outputs) as it is inappropriate. compiler/prog_util.m: Conform to parse tree changes. compiler/assertion.m: compiler/build_mode_constraints.m: compiler/cse_detection.m: compiler/delay_partial_inst.m: compiler/dependency_graph.m: compiler/det_report.m: compiler/equiv_type_hlds.m: compiler/format_call.m: compiler/goal_form.m: compiler/goal_path.m: compiler/goal_util.m: compiler/hlds_out.m: compiler/intermod.m: compiler/lambda.m: compiler/make_hlds_warn.m: compiler/mercury_to_mercury.m: compiler/mode_util.m: compiler/modes.m: compiler/module_qual.m: compiler/ordering_mode_constraints.m: compiler/polymorphism.m: compiler/post_typecheck.m: compiler/prop_mode_constraints.m: compiler/purity.m: compiler/quantification.m: compiler/simplify.m: compiler/stm_expand.m: compiler/stratify.m: compiler/structure_reuse.lfu.m: compiler/switch_detection.m: compiler/type_constraints.m: compiler/typecheck.m: compiler/unique_modes.m: compiler/unused_imports.m: Conform to changes in HLDS. compiler/il_peephole.m: compiler/ilasm.m: compiler/ilds.m: compiler/mlds_to_il.m: Rename some symbols to avoid the new keywords. library/exception.m: Add two helper predicates for the try goal transformations. doc/reference_manual.texi: NEWS: Document and announce the new language feature. compiler/notes/compiler_design.html: Note new compiler module. tests/hard_coded/Mmakefile: tests/hard_coded/try_syntax_1.exp: tests/hard_coded/try_syntax_1.m: tests/hard_coded/try_syntax_2.exp: tests/hard_coded/try_syntax_2.m: tests/hard_coded/try_syntax_3.exp: tests/hard_coded/try_syntax_3.m: tests/hard_coded/try_syntax_4.exp: tests/hard_coded/try_syntax_4.m: tests/hard_coded/try_syntax_5.exp: tests/hard_coded/try_syntax_5.m: tests/hard_coded/try_syntax_6.exp: tests/hard_coded/try_syntax_6.m: tests/hard_coded/try_syntax_7.exp: tests/hard_coded/try_syntax_7.m: tests/invalid/Mmakefile: tests/invalid/try_bad_params.err_exp: tests/invalid/try_bad_params.m: tests/invalid/try_io_else.err_exp: tests/invalid/try_io_else.m: Add test cases. tests/debugger/declarative/catch.m: The module name is now a keyword so requires brackets. tests/invalid/trace_goal_env.err_exp: Update test case for fixed spelling for "parameter". vim/syntax/mercury.vim: Add try, catch, catch_any as keywords.
Mercury Syntax Highlighting Under Vim 6.0 1. Create a diretory `~/.vim': $ mkdir ~/.vim 2. Copy everything recursively from this directory into `~/.vim': $ cp -r . ~/.vim IMPORTANT: If you already have a file `~/.vim/after/filetype.vim' then you should copy the files from this directory one by one, except for `after/filetype.vim' which you should append to your own `~/.vim/after/filetype.vim'. 3. Ensure you have the following lines in your `~/.vimrc' file: filetype on filetype plugin on syntax enable 4. If you wish to change the colour scheme used by Vim's syntax highlighting, we suggest you put the necessary commands in `~/.vim/colors/mycolours.vim' and append the following to the above list of commands in your `~/.vimrc': colors mycolours 4. Vim will load `~/.vim/syntax/mercury.vim' and `~/.vim/ftplugin/mercury.vim' automatically when opening a .m or .moo file. The syntax file describes two options you may wish to alter from your `~/.vimrc' file. The ftplugin file defines a number of useful keyboard mappings you may wish to consider.