yash-rs

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We need to address the following issues before the first beta release, which aims to be feature-complete with respect to POSIX 2018.

• [ ] Update README
• Failing scripted tests
  • alias-p.sh
    • [x] alias substitution to empty string
    • [x] alias substitution to blank before newline
    • [x] line continuation between alias names (1)
    • [x] Maybe #280
  • command-p.sh
    • [x] command exec retains redirection
  • errexit-p.sh
    • [x] errexit: last of pipeline #362
  • for-p.sh
    • [x] exit status with no words #363
  • option-p.sh
    • [x] nounset on: unset variable ${foo+bar} #363
    • [x] nounset on: unset variable ${foo:+bar} #363
  • param-p.sh
    • [x] length of unset variables, success #363
  • path-p.sh
    • [x] expansion with unsearchable directory #364
  • quote-p.sh
    • [x] backslashes resulting from expansions (a pattern) #364
  • redir-p.sh
    • [x] here-document with non-default file descriptor #364
    • [x] multiple here-documents on single command #364
  • trap-p.sh
    • [x] fatal shell error in trap #364
    • [x] trap command is not affected by redirections effective when set (4) #364
• Yash-arith crate
  • None
• Yash-builtin crate
  • None
• Yash-cli crate
  • [x] Disable non-blocking I/O on stdin 071779f
• Yash-env crate
  • [x] Use eaccess 7534090
  • [x] Elaborate catch_signal 33562bd
  • [ ] Support real-time signals (2)
  • [x] Variable::expand should require mutable self 528c57d5c408e4e236988fed1895f15a2d8c93f1
  • [x] Document VariableRefMut 468ae20ce25c7baa34402764bc02771241038e2b
  • [x] Report invalid UTF-8 bytes rather than ignoring them 7e0a45a9092add99e693a7cf10489563a489f933
  • [x] Make Frame non-exhaustive 35167517c727ee566a99655bce88b7fa04a2ef90
  • [x] Elaborate SelectSystem 57122ee2c2b6a012452817d687887d54bc314bc1
  • [x] Elaborate AsyncIo 57122ee2c2b6a012452817d687887d54bc314bc1
  • [x] Elaborate AsyncSignal 57122ee2c2b6a012452817d687887d54bc314bc1
  • [x] Extend internal handlers for other signals fb1c3a6875f7e2e60522df76c3f6511c44f53178
• Yash-semantics crate
  • [x] Use /proc/self/exe in fall_back_on_sh f75a0196c3b9cfc2748fcdae169c2fe339bc6197
  • [x] Use pretty::Message and annotate_snippet f1e352f32966aa329f512d5e46f1074414c51da4
  • [x] Elaborate Expand for TextUnit (2) 88966649a00026fcf6fb4a2258545ccbdb0f8f94
  • [x] Should we suppress return/break/continue from trap? 905576f650221edfb99d4cb6461ce90d3a0489c2
  • [x] Elaborate: Command::execute 88966649a00026fcf6fb4a2258545ccbdb0f8f94
• Yash-syntax crate
  • [x] Consider merging EmptyParam & UnclosedParam into InvalidParamName ccdc4a6950ce2435b82f26cec0d02847e3970ea5
    • We should possibly add InvalidCharInParam to EmptyParam & UnclosedParam.
  • [x] Elaborate the parser::lex::tilde module 68ec27368bfb145254776485916c72b661302f6b
  • [x] Include the corresponding here-doc operator 34035d1db738d4105936f4f861c9c5a97a1e6998
    • Probably we don't need to do anything.
  • [x] Most FromStr implementations ignore trailing redundant tokens, which should be rejected 93ecc26f1875fada27cc89a0222bcd12323788f7
  • [x] Elaborate the syntax::pretty module 47cb94a4565725a4990a0e95bd5b281cb0c1db24
  • [x] Avoid printing a keyword as the first word 50c2c38727760d44355a4c13928a02996670ddae