/// <summary>
/// Adds definitions from intersecting variable names, substituting their
/// values into the context. Similar to running "Define" on the present
/// context from each defined variable in the other context.
/// </summary>
/// <param name="other"></param>
public void DefineFrom(VariableContext other)
{
foreach (var variableName in _initMap.Keys)
{
if (other.IsDefined(variableName))
{
Define(variableName, other.Get(variableName));
}
}
}
public ISymbol ToValue(SymbolToken token)
{
if (token.Type != SymbolType.Number && token.Type != SymbolType.Variable)
{
throw new ArgumentException("Not a number", nameof(token));
}
if (token.Type == SymbolType.Variable)
{
return(_ctx.Get(token));
}
var s = token.Token;
if (!s.Contains("."))
{
var i = int.Parse(s);
return(new Number(i));
}
var f = double.Parse(s);
return(new Number(f));
}
