/// <summary>
/// Adds a new variable to the state machine.
/// </summary>
/// <param name="id">The identifier of the variable.</param>
/// <param name="declaration">The state type.</param>
/// <returns>The resulting variable object.</returns>
public Variable AddVariable(string id, StateType declaration)
{
if(_variables.ContainsKey(id))
{
throw new CompilerException(ErrorCode.VariableRedefinition,
"variable '" + id + "' already exists.");
}
var result = new Variable(id, declaration);
result.Index = _variables.Count;
result.Address = _nextaddress;
_nextaddress += result.Cardinality;
_variables.Add(id, result);
return result;
}
void TypeReference(out StateType stype)
{
stype = null; string name;
Identifier(out name);
stype = SM.GetStateType(name);
if (la.kind == 29) {
Get();
if(null != stype)
throw new CompilerException(ErrorCode.TypeRedefinition,
"type '" + name + "' is already defined.");
stype = SM.AddSimpleType(name);
IdList list;
IdentifierList(out list);
stype.AddStateNames(list);
Expect(30);
stype.Freeze();
}
if(null == stype)
throw new CompilerException(ErrorCode.UndefinedType,
"type '" + name + "' is undefined.");
}
void VariableDefinition(StateType stype)
{
string name;
Identifier(out name);
SM.AddVariable(name, stype);
}
public Variable(string id, StateType decl)
{
Name = id;
Type = decl;
// InitialCondition = new StateCondition(this, 0);
}