Function escape_for_parser

src/testdrive/src/action/sql.rs:161–177

Quote and escape `value` using only the escape sequences that `parser::split_line` recognises (`\\`, `\"`, `\n`, `\t`, `\r`, `\0`). Avoids `format!("{:?}", …)` because Rust's Debug impl also emits `\u{N}` for non-printable Unicode, which the parser does not understand and would silently corrupt on the next read.

(value: &str)

/// for non-printable Unicode, which the parser does not understand and would
/// silently corrupt on the next read.
fn escape_for_parser(value: &str) -> String {
    let mut out = String::with_capacity(value.len() + 2);
    out.push('"');
    for c in value.chars() {
        match c {
            '\\' => out.push_str("\\\\"),
            '"' => out.push_str("\\\""),
            '\n' => out.push_str("\\n"),
            '\t' => out.push_str("\\t"),
            '\r' => out.push_str("\\r"),
            '\0' => out.push_str("\\0"),
            c => out.push(c),
        }
    }
    out.push('"');
    out
}

fn rewrite_result(
    state: &mut State,