internal ILambdaValue Eval(ILambdaValue arg, Dictionary <string, ILambdaValue> env)
{
var ev1 = new Dictionary <string, ILambdaValue>(env);
ev1.Add(argName, arg);
return(body.Eval(env));
}
public ILambdaValue Eval(Dictionary <string, ILambdaValue> env)
{
var v1 = left.Eval(env);
var v2 = right.Eval(env);
if (v1 is NumberValue && v2 is NumberValue)
{
return(new NumberValue((v1 as NumberValue).GetNumValue() + (v2 as NumberValue).GetNumValue()));
}
else
{
throw new InvalidOperationException("Adding non-numbers");
}
}
public ILambdaValue Eval(Dictionary <string, ILambdaValue> env)
{
var arg1 = arg.Eval(env);
var c = f.Eval(env) as ClosureValue;
if (c != null)
{
return(c.Eval(arg1, env));
}
else
{
throw new InvalidOperationException("Apply a non-function");
}
}
public ILambdaValue Eval(Dictionary <string, ILambdaValue> env)
{
var b = condition.Eval(env);
if (b is NumberValue)
{
if ((b as NumberValue).GetNumValue() == 1)
{
return(trueValue.Eval(env));
}
else
{
return(falseValue.Eval(env));
}
}
else
{
throw new InvalidOperationException("Condition is not number");
}
}
public static ILambdaValue Interpret(ILambdaExpression e)
{
return(e.Eval(new Dictionary <string, ILambdaValue>()));
}