Estimated hours taken: 60
Branches: main
Added a new module, regex, as a companion to lex. The new module provides
functionality for converting conventional Unix-style regular expressions
into regexps for use with lex and a number of search and search-and-replace
functions for strings.
The new functionality has been tested fairly thoroughly (and led to several
bugs in lex being identified and fixed.)
NEWS:
Reported new additions.
extras/lex/README:
Now just points the reader to README.lex and README.regex.
extras/lex/README.lex:
extras/lex/README.regex:
Added. Brief introductions to the two libraries.
extras/lex/lex.automata.m:
extras/lex/lex.buf.m:
extras/lex/lex.convert_NFA_to_DFA.m:
extras/lex/lex.regexp.m:
Trivial formatting changes.
extras/lex/lex.lexeme.m:
Removed the parameter on inst compiled_lexeme.
extras/lex/lex.m:
Various formatting changes.
Added pred offset_from_start/3 which can be used to identify
the `current' point in the input stream with respect to lexing.
Added pred read_char/3 which can be used to read the `next'
char from the input stream without doing any lexing.
Added a field init_winner_func to the lexer_instance type. This
is used to resolve a bug whereby regular expressions that match
the empty string were not being spotted at the start of the input
stream.
Solved some bugs whereby an exception was incorrectly thrown in
some circumstance when the end of the input stream was reached.
extras/lex/regex.m:
Added. This file defines the functions for converting Unix-style
regular expression strings into regexps for use with lex and into
regexes for use with the string search(-and-replace) predicates
defined in this module.
extras/lex/Mmakefile:
Improved the installation instructions and included a check target.
extras/lex/tests:
extras/lex/tests/Mmakefile:
extras/lex/tests/test_regex:
extras/lex/tests/test_regex.in:
extras/lex/tests/test_regex.exp:
Added a test suite.
extras/lex/tests/cmp_regex_gawk:
This program looks for differences in behaviour between gawk and
regex.
extras/lex/samples/demo.m:
Moved to lex_demo.m
extras/lex/samples/lex_demo.m:
Was demo.m; slightly changed to include a match for unexpected
characters.
extras/lex/samples/regex_demo.m:
Added.
extras/lex/samples/Mmakefile:
Updated.
Estimated hours taken: 1
Branches: main
Recovered the lost check-ins from the CVS archive, obtained and
applied the patches and checked that all is well.
extras/lex/Mmakefile:
extras/lex/README:
extras/lex/lex.automata.m:
extras/lex/lex.buf.m:
extras/lex/lex.convert_NFA_to_DFA.m:
extras/lex/lex.lexeme.m:
extras/lex/lex.m:
extras/lex/lex.regexp.m:
extras/lex/samples/demo.m:
Patched to recover the lost check-in.
