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hush: reorganized TODO comment at top

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-05-21 15:46:24 +02:00
parent 214b8ca3dc
commit 349ef96bb5
1 changed files with 12 additions and 14 deletions
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26
shell/hush.c
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@ -37,9 +37,14 @@
* handle the recursion implicit in the various substitutions, especially
* across continuation lines.
*
* POSIX syntax not implemented:
* TODOs:
* grep for "TODO" and fix (some of them are easy)
* special variables (done: PWD, PPID, RANDOM)
* tilde expansion
* aliases
* Tilde Expansion
* follow IFS rules more precisely, including update semantics
* builtins mandated by standards we don't support:
* [un]alias, command, fc, getopts, newgrp, readonly, times
*
* Bash compat TODO:
* redirection of stdout+stderr: &> and >&
@ -49,20 +54,13 @@
* process substitution: <(list) and >(list)
* =~: regex operator
* let EXPR [EXPR...]
* Each EXPR is an arithmetic expression (ARITHMETIC EVALUATION)
* If the last arg evaluates to 0, let returns 1; 0 otherwise.
* NB: let `echo 'a=a + 1'` - error (IOW: multi-word expansion is used)
* Each EXPR is an arithmetic expression (ARITHMETIC EVALUATION)
* If the last arg evaluates to 0, let returns 1; 0 otherwise.
* NB: let `echo 'a=a + 1'` - error (IOW: multi-word expansion is used)
* ((EXPR))
* The EXPR is evaluated according to ARITHMETIC EVALUATION.
* This is exactly equivalent to let "EXPR".
* The EXPR is evaluated according to ARITHMETIC EVALUATION.
* This is exactly equivalent to let "EXPR".
* $[EXPR]: synonym for $((EXPR))
*
* TODOs:
* grep for "TODO" and fix (some of them are easy)
* special variables (done: PWD, PPID, RANDOM)
* follow IFS rules more precisely, including update semantics
* builtins mandated by standards we don't support:
* [un]alias, command, fc, getopts, newgrp, readonly, times
* export builtin should be special, its arguments are assignments
* and therefore expansion of them should be "one-word" expansion:
* $ export i=`echo 'a b'` # export has one arg: "i=a b"