path: root/to.do/Wish-List

// Good idea. It might be easier to auto-prefix them instead.
start conditions given own name space by making them structure fields
	#define BEGIN(x) yy_start_state = yy_states->x

// Easy.
yylineno maintained per input buffer

// Done.
use yyconst instead of const, to fix __STDC__ == 0 problem

// We rely on %option unput instead.
scan input for unput()

// Not worth the effort.
-CF/-Cf support interactive scanners

// What does this mean?
reject_really_used -> maintain_backup_tables

// Would be easier to rewrite it.
full library encapsulation: flex'ing on the fly

// Currently, max=32k states. Is this an unreasonable limit?
fix MAX_MNS/MARKER_DIFFERENCE to not be a hard limit

// Not doable, especially for the regex operator precedence case.
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.

// Done.
reentrant C scanners

// Why not use fseek/lseek ?
yy_fseek() for positioning in input file

// What does this mean?
set-able "at beginning of line" , no more unput() trashes yytext?

// Doable.
yy_unput_string(); unput() shifts yytext to preserve it, grows buffer as needed

// Bleh.
yy_malloc_type as void* so can be easily switched to char* for poor
	hopeless bastards running SunSoft stuff?

// Done.
public "TODO" file, requesting help?

// Done.
test -P to make sure it's not broken now due to e.g. yy_scan_string

// What does this mean?
hook for treating input interactively even if not isatty()

// Easy.
document yy_fill_buffer

// Are these tools even updated anymore?
lint, gcc-lint

// Obsolete.
-lfl removed from flex.1

// What does this mean?
merge 2.4.6, e.g., NEWS

// Is it bothering anyone?
'|' action copies action instead of omitting break

// Doable.
if yy_current_buffer defined on entry to yylex(), don't promote nil yyin
	to stdin, etc.

// Inevitable, but a daunting task.
multibyte character flex

// Done ("traditional")
ANSI only

// Obsolete.
multiple inclusion of <stdlib.h>?

// Put on back burner.
[=...=] POSIX stuff

// Done.
yylineno, yycol by checking for whether rules can match embedded newlines,
	only trailing newlines, always trailing newlines, or no newlines

// Bleh.
compute transition path to each DFA state, to aid in backtracking
	for each state, store pointer to predecessor, character for xtion

// Obsolete.
merge flex.1, flexdoc.1?

// In the works.
bison++ interface

// What is this supposed to do?
YYLEXER_NAME

// Moot. C++ will get an overhaul eventually.
out-line FlexLexer destructors

// What does this mean?
GNU readline contrib?

// Done.
isatty() decl?

// I think this is obsolete.
#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

// Done.
alloca.c removed from Makefile

// Doable.
// comments

// Done. (%% lines in skel)
output partitioning for e.g., scanning tables, actions, etc.

// Done.
texinfo version of manual

// What does this mean?
example of "error" backtracking rules as opposed to "catch-all"

// What does this mean?
get rid of get_previous_state via accepting #'s tied to previous state #'s

// Doable.
-p tells something about backtracking

// Done.
easy way to scan strings instead of files

// Useful, but tricky.
input() across buffer boundaries, buffer overflow; unput() fix

// Done.
start state stack

// I guess this is handled by the set_bol() stuff.
NLSTATE - sets "in newline" state; also mechanism to clear "in newline" state

// Unreachable rules are flagged. Is this what is meant?
checks for bogus backtrack rules  ... - rule shadowing

// Done.
document incompatibility with lex when unput()'ing a newline
	after a newline has been read

// Incorrect. They are allowed.
document that comments are not allowed on definition lines
	foo  bar  /* the "foo" definition ... */

// What does this mean?
perhaps indented code in section 2 leads to warnings?

// Easy.
#line directives for code at beginning of scanner routine

// Done.
nuke %used etc.

// Done.
hooks for direct access to the buffer, e.g. for flushing it

// Done.
options in .l file as well as on command line; particularly the rename-prefix
	option

// Done.
clarify "eat up * not followed by /" in <comment> example; move it to
    performance, offer simpler version for start states

// Doable.
hook for finding out how much text can be safely pushed back

// What does this mean?
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")

// Obsolete.
yy_switch_to_buffer sets yy_init to 0?

// Excellent idea.
handy library routines, such as yy_C_comment(), yy_C_string(),

// Done.
obey #line directives in input; first, get rid of # comments ...

// Done.
flex.h header for declarations of e.g., yymore(), yytext?
	but what about %array making the yytext definition out of date?

// What does this mean?
merge w/ okeeffe code

// Easy.
rearrange the Performance Considerations section so that the easy
    fixes come first

// Done.
copyright notice in manuals?

// Doable.
input() updates yytext and yyleng; perhaps unput too???;
	right now it trashes them (doesn't restore '\0')

// No. yyleng should not be modifable.
document that yyleng can now be modified
	except if yymore() used?

// Icky.
anchoring allowed inside ()'s - (^abc|def$)

// 
unput() propagates non-newline state too?

// Not doable. Anchors chars are only special at ends of RE.
complain about invalid anchoring - foo(^abc), (^abc)+

// Not likely.
library in its own directory

// Done.
yylineno

// Why?
example in flexdoc on YY_INPUT reading from input()

// Not currently doable.
redesign for retargetability (i.e., use w/ other languages ...)

// ???
clean up escape expansion

// In progress.
bison @N

// Done.
example for doc. on scanning strings w/ escapes in them:

// Done.
POSIX/

// Done.
get rid of duplicated code between "re2 re" rule and "re '$'" rule

// Obsolete.
preformatted man pages for VMS sites, possibly using col -b to get rid
	of backspaces ...

// Interesting.
slurp entire input file into mega-buffer; allows pointers to in-place
	identifiers

// Done.
lex compatibility flag

// Done.
update flags in docs

// Done. It's still there.
-n removed from POSIX?

// Obsolete.
"MAKE = ..." shouldn't be commented out, or else bigtest can fail
BSD man macros