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Diffstat (limited to 'to.do/Wish-List')
| -rw-r--r-- | to.do/Wish-List | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/to.do/Wish-List b/to.do/Wish-List new file mode 100644 index 0000000..59f2d74 --- /dev/null +++ b/to.do/Wish-List @@ -0,0 +1,123 @@ +start conditions given own name space by making them structure fields + #define BEGIN(x) yy_start_state = yy_states->x +reentrant/ +streams/ +yylineno maintained per input buffer +use yyconst instead of const, to fix __STDC__ == 0 problem +scan input for unput() +-CF/-Cf support interactive scanners +reject_really_used -> maintain_backup_tables +full library encapsulation: flex'ing on the fly +fix MAX_MNS/MARKER_DIFFERENCE to not be a hard limit +Two flags to warn when something is seen that lex or posix might interpret + differently; this should be quite doable as -l already exists. Proposed + names: -Wl, -Wp. +reentrant C scanners +yy_fseek() for positioning in input file +set-able "at beginning of line" , no more unput() trashes yytext? +yy_unput_string(); unput() shifts yytext to preserve it, grows buffer as needed +yy_malloc_type as void* so can be easily switched to char* for poor + hopeless bastards running SunSoft stuff? +public "TODO" file, requesting help? +test -P to make sure it's not broken now due to e.g. yy_scan_string +%option +hook for treating input interactively even if not isatty() +scan.l:22:error message :-( (see flex.todo) +document yy_fill_buffer +lint, gcc-lint +-lfl removed from flex.1 +merge 2.4.6, e.g., NEWS +'|' action copies action instead of omitting break +if yy_current_buffer defined on entry to yylex(), don't promote nil yyin + to stdin, etc. +multibyte character flex + + +ANSI only +multiple inclusion of <stdlib.h>? +[=...=] POSIX stuff ++flex.todo +yylineno, yycol by checking for whether rules can match embedded newlines, + only trailing newlines, always trailing newlines, or no newlines +compute transition path to each DFA state, to aid in backtracking + for each state, store pointer to predecessor, character for xtion +merge flex.1, flexdoc.1? +bison++ interface +YYLEXER_NAME +out-line FlexLexer destructors +GNU readline contrib? +isatty() decl? +#ifdef chud for unput() etc. not being used? + "../scan.l", line 207: warning: ::yy_did_buffer_switch_on_eof defined but not used + cc -c -g scan.c + "scan.cc", line 1752: warning: statement not reached +alloca.c removed from Makefile +// comments + +output partitioning for e.g., scanning tables, actions, etc. + + 497 09/11 14:17-PDT 3450 To:t_bonner@oscar Re: Modifying yytext in an actio +MISC stuff non-writeable +texinfo version of manual + + ALSO: document how to do so (including no need to redefine unput()), + whether feature added or not + +example of "error" backtracking rules as opposed to "catch-all" +get rid of get_previous_state via accepting #'s tied to previous state #'s +-p tells something about backtracking +easy way to scan strings instead of files +input() across buffer boundaries, buffer overflow; unput() fix +start state stack +NLSTATE - sets "in newline" state; also mechanism to clear "in newline" state +checks for bogus backtrack rules ... - rule shadowing +document incompatibility with lex when unput()'ing a newline + after a newline has been read +document that comments are not allowed on definition lines + foo bar /* the "foo" definition ... */ +perhaps indented code in section 2 leads to warnings? +#line directives for code at beginning of scanner routine +nuke %used etc. +hooks for direct access to the buffer, e.g. for flushing it +options in .l file as well as on command line; particularly the rename-prefix + option +clarify "eat up * not followed by /" in <comment> example; move it to + performance, offer simpler version for start states +hook for finding out how much text can be safely pushed back +the .backtrack code knows how to identify characters that cause transitions + (you wanted this for some clearer error messages for the + "default rule can be matched") +yy_switch_to_buffer sets yy_init to 0? +handy library routines, such as yy_C_comment(), yy_C_string(), +obey #line directives in input; first, get rid of # comments ... +flex.h header for declarations of e.g., yymore(), yytext? + but what about %array making the yytext definition out of date? +merge w/ okeeffe code +rearrange the Performance Considerations section so that the easy + fixes come first +copyright notice in manuals? +input() updates yytext and yyleng; perhaps unput too???; + right now it trashes them (doesn't restore '\0') +document that yyleng can now be modified + except if yymore() used? +anchoring allowed inside ()'s - (^abc|def$) +unput() propagates non-newline state too? +complain about invalid anchoring - foo(^abc), (^abc)+ +library in its own directory +yylineno +example in flexdoc on YY_INPUT reading from input() +redesign for retargetability (i.e., use w/ other languages ...) +clean up escape expansion +bison @N +example for doc. on scanning strings w/ escapes in them: +POSIX/ +get rid of duplicated code between "re2 re" rule and "re '$'" rule +preformatted man pages for VMS sites, possibly using col -b to get rid + of backspaces ... +slurp entire input file into mega-buffer; allows pointers to in-place + identifiers +lex compatibility flag +update flags in docs +-n removed from POSIX? +"MAKE = ..." shouldn't be commented out, or else bigtest can fail +BSD man macros |