```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}
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);
      const variable = this.read_variable(true, false, 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);
  }