static void ShiftCase(CleanupAstNodeStates cleanStates, int advancePosition)
{
var colon = cleanStates.GeNextTokenKind(TokenKind.Colon, advancePosition);
var tokenAfterColon = cleanStates[colon + 1].Token;
switch (tokenAfterColon)
{
case TokenKind.Continue:
case TokenKind.Return:
case TokenKind.Break:
case TokenKind.Case:
cleanStates.ShiftByNodeType(colon + 1);
cleanStates.ReduceRangeOfTokensAsParent(colon + 1, colon + 1, RuleKind.CaseBlock);
cleanStates.ReduceRangeOfTokensAsParent(advancePosition, colon + 1, RuleKind.Case);
return;
}
var breakPos = cleanStates.GeNextTokenOfAny(new[]
{
TokenKind.Break,
TokenKind.Return,
TokenKind.Continue,
TokenKind.Case,
}, colon);
if (breakPos == 0)
{
cleanStates.ReduceRangeOfTokensAsParent(colon + 1, cleanStates.Count - 2, RuleKind.CaseBlock);
cleanStates.ReduceRangeOfTokensAsParent(advancePosition, colon + 1, RuleKind.Case);
return;
}
var breakToken = cleanStates[breakPos].Token;
switch (breakToken)
{
case TokenKind.Case:
cleanStates.ReduceRangeOfTokensAsParent(colon + 1, breakPos - 1, RuleKind.CaseBlock);
cleanStates.ReduceRangeOfTokensAsParent(advancePosition, colon + 1, RuleKind.Case);
return;
case TokenKind.Return:
cleanStates.ShiftByNodeType(breakPos);
cleanStates.ReduceRangeOfTokensAsParent(colon + 1, breakPos, RuleKind.CaseBlock);
cleanStates.ReduceRangeOfTokensAsParent(advancePosition, colon + 1, RuleKind.Case);
return;
}
cleanStates.ReduceRangeOfTokensAsParent(colon + 1, breakPos + 1, RuleKind.CaseBlock);
cleanStates.ReduceRangeOfTokensAsParent(advancePosition, colon + 1, RuleKind.Case);
}