/// <summary>
/// Searches through this scopes local variables for the inputted variable.
/// If specified, this search will continue recursively up the nesting tree until we reach global scope.
/// </summary>
/// <param name="variableName"></param>
/// <returns></returns>
internal bool VariableExists(string variableName, ScopeSearchOption searchOption = ScopeSearchOption.kThisScope)
{
bool result = LocalVariables.ContainsKey(variableName);
if (result || searchOption == ScopeSearchOption.kThisScope || ParentScope == null)
{
return(result);
}
// Search the parent - this will recurse upwards
return(ParentScope.VariableExists(variableName, searchOption));
}
internal Variable GetLocalVariable(string variableName, ScopeSearchOption searchOption = ScopeSearchOption.kUpwardsRecursive)
{
Debug.Assert(VariableExists(variableName, searchOption));
Variable variable;
if (LocalVariables.TryGetValue(variableName, out variable))
{
return(variable);
}
else if (ParentScope != null)
{
return(ParentScope.GetLocalVariable(variableName));
}
else
{
return(null);
}
}