php-parser/src/parser/try.js

Parse PHP code from JS and returns its AST

/**
 * Copyright (C) 2018 Glayzzle (BSD3 License)
 * @authors https://github.com/glayzzle/php-parser/graphs/contributors
 * @url http://glayzzle.com
 */
"use strict";

module.exports = {
  /*
   * ```ebnf
   *  try ::= T_TRY '{' inner_statement* '}'
   *          (
   *              T_CATCH '(' namespace_name (variable)? ')' '{'  inner_statement* '}'
   *          )*
   *          (T_FINALLY '{' inner_statement* '}')?
   * ```
   * @see https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L448
   * @return {Try}
   */
  read_try: function () {
    this.expect(this.tok.T_TRY);
    const result = this.node("try");
    let always = null;
    const catches = [];
    const body = this.next().read_statement();
    // https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L455
    while (this.token === this.tok.T_CATCH) {
      const item = this.node("catch");
      this.next().expect("(") && this.next();
      const what = this.read_list(this.read_namespace_name, "|", false);
      let variable = null;
      if (this.version < 800 || this.token === this.tok.T_VARIABLE) {
        variable = this.read_variable(true, false);
      }
      this.expect(")");
      catches.push(item(this.next().read_statement(), what, variable));
    }
    if (this.token === this.tok.T_FINALLY) {
      always = this.next().read_statement();
    }
    return result(body, catches, always);
  },
};