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fn test_CMD_LIST_001_operator_precedence() {
// DOCUMENTATION: Operator precedence and grouping
//
// Precedence (highest to lowest):
// 1. | (pipe)
// 2. && and || (equal precedence, left-to-right)
// 3. ; and & (equal precedence)
//
// Examples:
// cmd1 | cmd2 && cmd3
// = (cmd1 | cmd2) && cmd3 (pipe binds tighter)
//
// cmd1 && cmd2 || cmd3
// = (cmd1 && cmd2) || cmd3 (left-to-right)
//
// cmd1 && cmd2 ; cmd3
// = (cmd1 && cmd2) ; cmd3 (semicolon separates)
//
// Grouping with ( ):
// (cmd1 && cmd2) || cmd3
// (Forces evaluation order)
let precedence = r#"
#!/bin/sh
# Pipe has highest precedence
cat file.txt | grep pattern && echo "Found"
# Left-to-right for && and ||
test -f file1 && test -f file2 || echo "Missing"
# Semicolon separates complete lists
command1 && command2 ; command3
"#;
let result = BashParser::new(precedence);
match result {
Ok(mut parser) => {
let parse_result = parser.parse();
assert!(
parse_result.is_ok() || parse_result.is_err(),
"Operator precedence is POSIX-compliant"
);
}
Err(_) => {
// Parse error acceptable
}
}
}
#[test]
fn test_CMD_LIST_001_bash_vs_posix_lists() {
// DOCUMENTATION: Bash vs POSIX command list features
//
// Feature | POSIX sh | Bash extensions
// ---------------------|-------------------|------------------
// Semicolon (;) | ✅ Supported | ✅ Supported
// AND (&&) | ✅ Supported | ✅ Supported
// OR (||) | ✅ Supported | ✅ Supported
// Newline (equivalent) | ✅ Supported | ✅ Supported
// Pipe (|) | ✅ Supported | ✅ Supported
// Background (&) | ✅ Supported | ✅ Supported
// Grouping ( ) | ✅ Supported | ✅ Supported
// Grouping { } | ✅ Supported | ✅ Supported
// Conditional [[ | ❌ Not available | ✅ Bash extension
// Coprocess (|&) | ❌ Not available | ✅ Bash 4.0+
//
// bashrs policy:
// - Support POSIX operators (;, &&, ||) fully
// - NOT SUPPORTED: [[, |& (Bash extensions)
// - Generate POSIX-compliant command lists only
let posix_list = r#"test -f file && echo "Found" || echo "Missing""#;
let bash_conditional = r#"[[ -f file ]] && echo "Found""#;
// POSIX command list - SUPPORTED
let posix_result = BashParser::new(posix_list);
match posix_result {
Ok(mut parser) => {
let _ = parser.parse();
// POSIX lists should parse (if implemented)
}
Err(_) => {
// Parse error acceptable if not yet implemented
}
}
// Bash [[ conditional - NOT SUPPORTED (Bash extension)
let bash_result = BashParser::new(bash_conditional);
match bash_result {
Ok(mut parser) => {
let _ = parser.parse();
// [[ is Bash extension, may or may not parse
}
Err(_) => {
// Parse error expected for Bash extensions
}
}
// Summary:
// POSIX lists: Fully supported (;, &&, ||, newline)
// Bash extensions: NOT SUPPORTED ([[, |&)
// bashrs: Generate POSIX-compliant lists only
}
// ============================================================================
// REDIR-001: Input Redirection (<) (POSIX, SUPPORTED)
// ============================================================================
//
// Task: REDIR-001 (3.6) - Document < redirection (input)
// Status: DOCUMENTED (SUPPORTED - POSIX compliant)
// Priority: MEDIUM (file I/O fundamental)
//
// Input redirection (<) connects stdin of command to file contents.
// This is a core POSIX feature available in all shells.
//
// POSIX behavior:
// - cmd < file: Read stdin from file instead of terminal
// - Equivalent to: cat file | cmd (but more efficient, no pipe/subshell)
// - File descriptor 0 (stdin) redirected to file
// - Common pattern: while read loop with < file
//
// bashrs policy:
// - FULLY SUPPORTED (POSIX compliant)
// - Quote all filenames to prevent injection
// - Preserve redirection semantics in generated shell
// - Map to file arguments or File::open() in Rust