public void AddType(LuatType type)
{
if (false == m_types.Contains(type))
{
m_types.Add(type);
}
}
public LuatLiteral(LuatType type)
: base(null)
{
m_type = type;
}
public LuatVariable(LuatValue parent, LuatType type, LuatVariableFlags flags)
: base(parent)
{
m_flags = flags;
m_type = type;
}
/// <summary>
/// Attempts to resolve (or infer) the variable type
/// </summary>
/// <param name="variable"></param>
/// <returns>true if the type was resolved or false if the type could not be resolved</returns>
private bool ResolveVariableType(LuatVariable variable)
{
LuatType type = variable.Type;
foreach (LuatValue.IReference assignment in variable.Assignments)
{
if (null == assignment.Value)
{
return(false);
}
LuatType rhsType = assignment.Value.Type;
if (rhsType is LuatTypeUnknown)
{
// Being assigned an unknown results in an unknown
return(false);
}
if (type is LuatTypeUnknown || type is LuatTypeNil)
{
type = rhsType;
continue;
}
if (rhsType is LuatTypeNil)
{
continue;
}
if (type.Equals(rhsType))
{
continue;
}
if (variable.IsFixedType)
{
assignment.AddWarning(WarningType.FixedType, string.Format("Type is fixed to {0}", type));
continue;
}
// Mixed types.
var mixed = type as LuatTypeMixed;
if (null == mixed)
{
mixed = new LuatTypeMixed();
mixed.AddType(type);
type = mixed;
}
mixed.AddType(rhsType);
}
if (null == type)
{
return(false);
}
variable.Type = type;
// Propagate resolving of variable types through expressions
foreach (LuatValue.IReference reference in variable.References)
{
reference.OnTypeInvalidated();
}
return(true);
}
public void AddType(LuatType type)
{
if (false == m_types.Contains(type))
{
m_types.Add(type);
}
}
public LuatVariable(LuatValue parent, LuatType type, LuatVariableFlags flags)
: base(parent)
{
m_flags = flags;
m_type = type;
}
public LuatLiteral(LuatType type)
: base(null)
{
m_type = type;
}
