//while-statement ::= 'while' '(' <expression> ')' '{' <statement>* '}
private void ParseWhileStatement()
{
//TODO: Consider 'break' support, but requires knowing the label
//to which we should goto in case of a break (storing it at the
//class level in a stack, because we could have nested scopes).
Match(new Token(TokenType.Keyword, "while"));
Match(new Token(TokenType.Symbol, "("));
_codeGenerator.BeginWhile();
ParseExpression();
_codeGenerator.WhileCondition();
Match(new Token(TokenType.Symbol, ")"));
Match(new Token(TokenType.Symbol, "{"));
ParseStatements();
Match(new Token(TokenType.Symbol, "}"));
_codeGenerator.EndWhile();
}