public bool UsesVariable(BlockVariable variable)
{
if(Variable.Equals(variable))
return true;
if(Expression.Equals(variable))
return true;
return false;
}
public bool UsesVariable(BlockVariable variable)
{
return false;
}
//returns true if any chunks or subblocks use a variable.
public bool UsesVariable(BlockVariable variable)
{
foreach(IProgramChunk chunk in program)
if(chunk.UsesVariable(variable))
return true;
return false;
}
public bool HasVariable(BlockVariable variable)
{
if (GetVariable(variable) != null)
return true;
else
return false;
}
/// <summary>
/// Searches for variable in the pool of local variables.
/// If it doesn't exist, create a new one, add it to the
/// pool, and return it.
/// </summary>
/// <param name="name">Variable name.</param>
/// <returns>BlockVariable. Never null.</returns>
public BlockVariable GetVariableByNameForced(string name)
{
BlockVariable variable = GetVariableByName(name);
if (variable == null)
{
variable = new BlockVariable(name);
AddVariable(variable);
}
return variable;
}
public BlockVariable GetVariable(BlockVariable variable)
{
foreach (BlockVariable var in Variables)
if (var.Equals(variable))
return var;
return null;
}
public void AddVariable(BlockVariable newVariable)
{
Variables.AddLast(newVariable);
}
public bool UsesVariable(BlockVariable variable)
{
//equals shouldn't be used here but that would be more standard
if (Name == variable.Name)
return true;
return false;
}
public bool Equals(BlockVariable variable)
{
if (this.Name.Equals(variable.Name))
{
if (this.Type.Equals(variable.Type) || !(variable.Type == VariableType.UNDEFINED))
if (this.Source.Equals(variable.Source) || !(variable.Source == VariableSource.UNDEFINED))
return true;
}
return false;
}
//NOTE: we only allow the assignment to a variable, constants
// can't change value.
public ProgramChunkAssignment(BlockVariable variable, ProgramChunkExpression expression)
{
Variable = variable;
Expression = expression;
}
