lexers.bash_sm

Hand-written Bash/Shell lexer using composable scanner mixins.

O(n) guaranteed, zero regex, thread-safe.

Language Support:

• Bash 5.x syntax
• POSIX shell compatibility
• Variable expansion ($var,${var},$(cmd))
• Here-documents (<<EOF)
• Process substitution (<(cmd),>(cmd))
• All control structures (if/fi,case/esac,for/done, etc.)
• Function definitions
• Arrays and associative arrays

Special Handling:

• Single-quoted strings: No escape sequences, literal content
• Double-quoted strings: Variable expansion, escape sequences
• $'...'strings: ANSI-C quoting
• Heredocs: Track delimiter for multiline content

Performance:

~55µs per 100-line file (complex quoting rules add overhead).

Thread-Safety:

All lookup tables are frozen sets.

See Also:

• rosettes.lexers.powershell_sm: PowerShell lexer