/// <summary>
/// Ignora todos os símbolos vazios consecutivos.
/// </summary>
/// <param name="symbolReader">O leito de símbolos.</param>
private void IgnoreVoids(ISymbolReader <string, string> symbolReader)
{
ISymbol <string, string> symbol = symbolReader.Peek();
while (voids.Contains(symbol.SymbolType))
{
symbolReader.Get();
symbol = symbolReader.Peek();
}
}
private void IgnoreVoids(ISymbolReader <string, string> reader)
{
var readed = reader.Peek();
while (readed.SymbolType == "blancks" || readed.SymbolType == "carriage_return" || readed.SymbolType == "new_line")
{
reader.Get();
readed = reader.Peek();
}
}
/// <summary>
/// Função de transição "enquanto" - estado 2.
/// </summary>
/// <param name="reader">O leitor de símbolos.</param>
/// <returns>O próximo estado.</returns>
private IState <string, string> WhileTransition(ISymbolReader <string, string> reader)
{
this.IgnoreVoids(reader);
var readed = reader.Peek();
var topScopeDefinition = this.scopeDefinitionStack.Pop();
if (readed.SymbolType == "eof")
{
this.currentResult.InterpreterMessageStatus = EMathematicsInterpreterStatus.WAITING;
this.currentResult.InterpreterResultMessage = "Incomplete expression.";
return(this.stateList[1]);
}
else if (readed.SymbolType == "left_brace")
{
reader.Get();
topScopeDefinition.ExecuteInScope = topScopeDefinition.ConditionExpression.AssertCondition();
topScopeDefinition.HasBraces = true;
if (topScopeDefinition.ExecuteInScope)
{
topScopeDefinition.ScopeStartMemento = (reader as MementoSymbolReader <CharSymbolReader <string>, string, string>).SaveToMemento();
this.scopeDefinitionStack.Push(topScopeDefinition);
}
return(this.stateList[0]);
}
else if (readed.SymbolType == "semi_colon")
{
topScopeDefinition.ExecuteInScope = topScopeDefinition.ConditionExpression.AssertCondition();
if (topScopeDefinition.ExecuteInScope)
{
this.scopeDefinitionStack.Push(topScopeDefinition);
return(this.stateList[2]);
}
else
{
return(this.stateList[0]);
}
}
else
{
topScopeDefinition.ExecuteInScope = topScopeDefinition.ConditionExpression.AssertCondition();
if (topScopeDefinition.ExecuteInScope)
{
topScopeDefinition.ScopeStartMemento = (reader as MementoSymbolReader <CharSymbolReader <string>, string, string>).SaveToMemento();
this.scopeDefinitionStack.Push(topScopeDefinition);
return(this.stateList[0]);
}
else
{
this.scopeDefinitionStack.Push(topScopeDefinition);
return(this.stateList[11]);
}
}
}
