private static void Parse(MoveInfo parentInfo, ParsingInfo parsingInfo, ScriptInfo scriptInfo)
{
SwitchStatement switchStatement = new SwitchStatement();
MoveInfo moveInfo = new MoveInfo(parentInfo);
// expression
IElement tryExpGroup = moveInfo.FindNextBlack(SearchDirection.LeftToRight);
if (!(tryExpGroup is ParenthesesGroup))
{
throw new SyntaxException("Could not find switch expression", parentInfo.GetErrorInfo());
}
ParenthesesGroup expGroup = (ParenthesesGroup)tryExpGroup;
MoveInfo expGroupInfo = new MoveInfo(expGroup, SearchTree.ContentBlock, 0, parentInfo);
Expression exp = Expression.Parse(expGroupInfo, parsingInfo, scriptInfo);
if (exp == null || expGroupInfo.FindNextBlack(SearchDirection.LeftToRight) != null)
{
throw new SyntaxException("Could not parse switch expression", parentInfo.GetErrorInfo());
}
// scope group
IElement tryScopeGroup = moveInfo.FindNextBlack(SearchDirection.LeftToRight);
if (!(tryScopeGroup is ScopeGroup))
{
throw new SyntaxException("Could not find switch ScopeGroup", parentInfo.GetErrorInfo());
}
ScopeGroup scopeGroup = (ScopeGroup)tryScopeGroup;
MoveInfo scopeGroupInfo = new MoveInfo(scopeGroup, SearchTree.ContentBlock, 0, parentInfo);
IElement nextCase = scopeGroupInfo.Find(SearchDirection.LeftToRight, SearchVisibility.Visible);
if (nextCase == null)
{
throw new SyntaxException("Could not find any switch case", parentInfo.GetErrorInfo());
}
while (nextCase != null)
{
if (!(
DefaultSwitchStatement.Check(scopeGroupInfo, parsingInfo, scriptInfo, true) ||
CaseSwitchStatement.Check(scopeGroupInfo, parsingInfo, scriptInfo, true)
))
{
throw new SyntaxException("Could not parse switch case/default", parentInfo.GetErrorInfo());
}
nextCase = scopeGroupInfo.FindNextBlack(SearchDirection.LeftToRight);
}
// build
int startIndex = parentInfo.CurrentIndex;
int length = (moveInfo.CurrentIndex + 1) - startIndex;
switchStatement.AddChildren(parentInfo.CurrentElements.GetRange(startIndex, length));
parentInfo.Replace(length, switchStatement);
}
