Dollar single-quote $'' syntax not implemented

[chaliy]

Description

The $'...' (ANSI-C quoting) syntax is not implemented. This affects 11+ skipped tests across quote.test.sh and unicode.test.sh.

Scope

• $'foo' - basic dollar single-quote literals
• $'\n', $'\t', $'\a', $'\b' - special character escapes
• $'\xNN' - hex escape sequences
• $'\NNN' - octal escape sequences
• $'\uNNNN' - 4-digit unicode escapes
• $'\UNNNNNNNN' - 8-digit unicode escapes
• $'\'' - escaped single quote inside
• $'\"' - escaped double quote inside
• $"" (dollar double-quote) synonym

Repro

echo $'hello\nworld'
# bashkit outputs: (empty line) — treats $'...' as empty
# expected: hello\nworld (two lines)

echo $'\x41\x42\x43'
# bashkit outputs: $\x41\x42\x43 — literal
# expected: ABC

echo $'\u03bc'
# bashkit outputs: $\u03bc — literal
# expected: μ (Greek letter mu)

Test coverage

• 10 skipped tests in crates/bashkit/tests/spec_cases/bash/quote.test.sh
• 3 skipped tests in crates/bashkit/tests/spec_cases/bash/unicode.test.sh

All added in PR #351.

Oils reference: https://github.com/oilshell/oil/blob/master/spec/quote.test.sh

Related

• Nameref (local -n / typeset -n) not implemented #354 (unicode \u/\U in printf also missing)