/// <summary>
/// resets the context to its defaults
/// </summary>
public void Reset()
{
inScope = new List<Variables>();
Functions = new Functions();
Globals = new Variables();
Functions.InitDefaults();
Globals["pi"] = 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679; // Math.Pi is not very precise
Globals["e"] = 2.7182818284590452353602874713526624977572470936999595749669676277240766303535475945713821785251664274; // Math.E is not very precise
Globals["phi"] = 1.6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374; // no Math.Phi at all
}