public SwitchCaseExpression parseCase()
{
CaseExpression caseExp;
DefaultExpression defaultExp;
if (currentTokenEquals(Token.TokenValue.CASE))
{
caseExp = new CaseExpression();
nextToken();
caseExp.literal = parseLiteralExpression();
nextTokenIfEquals(Token.TokenValue.TWOPOINTS);
//case 'a': break;
if (currentTokenEquals(Token.TokenValue.BREAK))
{
caseExp.body = null;
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
//case 'a':
//case 'b': ...
else if (currentTokenEquals(Token.TokenValue.CASE) || currentTokenEquals(Token.TokenValue.DEFAULT))
{
caseExp.body = null;
caseExp.next = parseCase();
}
//case 'a':
// e
// break;
else
{
caseExp.body = parseExpression();
caseExp.next = null;
nextTokenIfEquals(Token.TokenValue.BREAK);
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
return caseExp;
}
else if (currentTokenEquals(Token.TokenValue.DEFAULT))
{
defaultExp = new DefaultExpression();
nextToken();
nextTokenIfEquals(Token.TokenValue.TWOPOINTS);
//default: break;
if (currentTokenEquals(Token.TokenValue.BREAK))
{
defaultExp.body = null;
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
//default:
// e
// break;
else
{
defaultExp.body = parseExpression();
nextTokenIfEquals(Token.TokenValue.BREAK);
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
return defaultExp;
}
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.CASE);
}
public void addDefault(DefaultExpression de)
{
if (cases == null)
{
cases = new List<SwitchCaseExpression>();
}
cases.Add(de);
hasDefaultCase = true;
}