/// <summary>
/// Attempts to add a variable to the current code block hash, checking
/// that it is a valid movement to make.
/// </summary>
/// <param name="name">The name of the variable to add.</param>
/// <param name="tipo">The type of the variable to add.</param>
/// <param name="isArr">Boolean determining if the variable is an array
/// </param>
/// <param name="sizes">In case of being an array, its size</param>
private void AddVariable(string name, Type tipo, bool isArr, List <int> sizes)
{
if (!_currentScope.ExistsInScope(name))
{
if (isArr)
{
Symbol symbol = new VariableArray(sizes)
{
Name = name,
Type = tipo
};
_currentScope.Add(symbol);
}
else
{
Symbol symbol = new Variable
{
Name = name,
Type = tipo,
Value = ConstantBuilder.DefaultValue(tipo)
};
_currentScope.Add(symbol);
}
}
else
{
SemErr($"El nombre '{name}' ya ha sido declarado en este scope.");
}
}
/// <summary>
/// Builds a new cAssignIndex command
/// </summary>
/// <param name="array">Array to be assigned.</param>
/// <param name="indexes">The indexes</param>
private void DoAssignIndex(VariableArray array, List <DirectValueSymbol> indexes)
{
if (array.Lengths.Count != indexes.Count)
{
SemErr("Cantidad de dimensiones incorrecta.");
return;
}
var cmd = new AssignIndex
{
Array = array,
Indexes = indexes
};
_currentScope.CommandList.Commands.Add(cmd);
}
void Variable(out Variable variable, out List <DirectValueSymbol> indexes)
{
indexes = new List <DirectValueSymbol>();
Expect(1);
string name = t.val; CheckVariableExists(name); var symbol = _currentScope.Search(name) ?? (new Variable()); variable = symbol as Variable;
if (la.kind == 15)
{
Get();
Expresion();
indexes.Add(_symbolStack.Pop() as DirectValueSymbol);
while (la.kind == 7)
{
Get();
Expresion();
indexes.Add(_symbolStack.Pop() as DirectValueSymbol);
}
Expect(16);
CheckIsArray(name); VariableArray array = (symbol as VariableArray); DoAssignIndex(array, indexes); variable = array;
}
}