parseWhile method
Implementation
Statement parseWhile() {
int? line = token!.line;
int? start = token!.startOffset;
assert(token!.text == 'while');
consume(Token.NAME);
consume(Token.LPAREN);
Expression condition = parseExpression();
consume(Token.RPAREN);
Statement body = parseStatement();
return WhileStatement(condition, body)
..start = start
..end = endOffset
..line = line;
}