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Estimated hours taken: 4 Allow user-defined operator precedence tables for parser__read_term and term_io__write_term. library/ops.m: Define a typeclass `op_table' with methods for accessing operator precedence tables. Define a type `ops__mercury_op_table', representing the standard Mercury operator table. Make `ops__mercury_op_table' an instance of `op_table'. Define `ops__table' as equivalent to `ops__mercury_op_table' (it's obsolete, but we can't mark types as obsolete). Rename `ops__init_op_table' as `ops__init_mercury_op_table', mark ops__init_op_table as obsolete library/parser.m: library/term_io.m: Add variants of `parser__read_term' and `term_io__write_term' which take an operator precedence table. Don't hard-code the maximum priority and argument priority. Use the `op_table' methods to find those. Make the priority of operator terms (X `op` Y) 1, not 100. The reference manual states that operator terms have the highest precedence possible. This change slows down a program which does nothing but parse terms by a bit under 5%, less for writing. library/hash_table.m: Fix a few places where parentheses are required because operator terms now have the lowest possible priority. `rem' is an operator -- it doesn't need backquotes. compiler/mercury_to_mercury.m: library/io.m: Rename `ops__init_op_table' to `ops__init_mercury_op_table'. Pass the `op_table' to `ops__max_priority'. NEWS: doc/reference_manual.texi: Document the changes. Add operator terms to the operator table. In the "Terms" section of the reference manual, use the same terminology to describe operator terms as is used in the "Builtin Operators" section. samples/Mmakefile: samples/README: samples/calculator2.m: An example program. tests/hard_coded/term_io_test.exp: tests/invalid/func_errors.err_exp: tests/invalid/inst_list_dup.err_exp: tests/invalid/predmode.err_exp: tests/invalid/some_err.exp: `term_io__write_term' now has the same argument priority behaviour as `parser__read_term', so remove some unnecessary parentheses from the output.
6 lines
430 B
Plaintext
6 lines
430 B
Plaintext
func_errors.m:010: Error: some but not all arguments have modes: bar(int :: in, int).
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func_errors.m:011: Error: function arguments have modes, but function result doesn't: baz(int :: in, int :: in).
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func_errors.m:012: Error: function result has mode, but function arguments don't: quux(int, int).
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func_errors.m:018: Error: some but not all arguments have modes: q(int :: in, int).
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For more information, try recompiling with `-E'.
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