public IfBranchVariable CreateElseBranchVariable(IEnumerable <Token> tokens, Token token, ICollection <Variable> variables, int i)
{
var branchVariable = new IfBranchVariable
{
Value = token.Flag
};
ICollection <Token> subTokens = new List <Token>();
Util.CollectionTokens(tokens, subTokens, i + 1, Strings.StartFlag2, Strings.EndFlag2, true);
var count = subTokens.Count();
ICollection <Variable> bodyVariables = new List <Variable>();
branchVariable.Variables = bodyVariables;
for (var a = 0; a < count; a++)
{
var subToken = subTokens.ElementAt(a);
var handler = VariableHandleFactory.Create(subToken.Flag);
a = handler.TryAddVariable(subTokens, subToken, bodyVariables, a);
}
branchVariable.TokenCount = count;
return(branchVariable);
}
private static IEnumerable <CaseVariable> GetCaseVariables(ICollection <Token> tokens)
{
var n = tokens.Count();
ICollection <CaseVariable> caseVariables = new List <CaseVariable>();
ICollection <Variable> variables = new List <Variable>();
CaseVariable lastCaseVariable = null;
for (var a = 0; a < n; a++)
{
var token = tokens.ElementAt(a);
var flag = token.Flag;
if (flag == Break)
{
lastCaseVariable.Variables = variables.ToArray();
variables.Clear();
lastCaseVariable = null;
continue;
}
else if (flag != Case && flag != DefaultStr)
{
var handler = VariableHandleFactory.Create(flag);
a = handler.TryAddVariable(tokens, token, variables, a);
continue;
}
if (lastCaseVariable == null)
{
lastCaseVariable = new CaseVariable();
caseVariables.Add(lastCaseVariable);
}
if (flag == DefaultStr)
{
lastCaseVariable.Default = true;
if (tokens.ElementAt(a + 1).Flag != Strings.Colon)
{
throw new ArgumentException("switch 语法错误");
}
a += 1;
continue;
}
var nextFlag = tokens.ElementAt(a + 1).Flag;
var result = DefaultVariableHandler.CreateVariable(tokens, nextFlag, a + 1);
lastCaseVariable.ConstVariable.Add(result.Item1);
var nextSplitFlag = tokens.ElementAt(result.Item2 + 1).Flag;
if (nextSplitFlag != Strings.Colon)
{
throw new ArgumentException("switch 语法错误");
}
a += 2;
}
return(caseVariables);
}
