Function isHeredocDelimChar

src/utils/bash/bashParser.ts:252–270

* Unquoted heredoc delimiter chars. Bash accepts most non-metacharacters — * not just identifiers. Stop at whitespace, redirects, pipe/list operators, * and structural tokens. Allows !, -, ., +, etc. (e.g. <<!HEREDOC!).

(c: string)

 * and structural tokens. Allows !, -, ., +, etc. (e.g. <<!HEREDOC!).
 */
function isHeredocDelimChar(c: string): boolean {
  return (
    c !== '' &&
    c !== ' ' &&
    c !== '\t' &&
    c !== '\n' &&
    c !== '<' &&
    c !== '>' &&
    c !== '|' &&
    c !== '&' &&
    c !== ';' &&
    c !== '(' &&
    c !== ')' &&
    c !== "'" &&
    c !== '"' &&
    c !== '`' &&
    c !== '\\'
  )
}

function skipBlanks(L: Lexer): void {
  while (L.i < L.len) {