Naming of well known constants in C#, VB code (Math.PI instead of 3.1415926535897931)

[KvanTTT]

It would be good to convert double numbers to well know constants (such as Math.PI, Math.E) and their combinations (Math.PI * 2).

I mean decompile IL to:

if (x > Math.PI)
    x -= Math.PI * 2;

instead of:

if (x > 3.1415926535897931)
    x -= 6.2831853071795862;

[PoroCYon]

This can get quite hard, because constants (and constant expressions, like PI * 2) are replaced by their value by the compiler, and the value of a constant expression that has a constant in it (like PI * 2 again) is hard to decompose back into the expression.

[KvanTTT]

@PoroCYon, I mean small part of most used combinations which can be added or calculated manually.

I found following Math.PI combinations using with github "Advanced search".

So, taking above result into consideration, I suppose to calculate pi coefficient by following way: c = Math.PI / constant. If we getting "good" value (equal exactly to 1.0, 2.0, 0.5, 1/180 and so on), we simply replacing it with symbolic expression (Math.PI, Math.PI * 2, Math.PI / 2, Math.PI / 180 and so on).

Also descried above algorithm should be applied for constant Math.E.

I'll try to implement this feature.

[KvanTTT]

I analyzed most popular .net decompilers (JustDecompile, dotPeek, .NET Reflector) and found that only dotPeek supports this feature.

[dee-see]

@KvanTTT Did you notice if dotPeek really decompiled that or if it was using Microsoft's PDB servers (which is a built-in feature of dotPeek)?

[PoroCYon]

@dee-see dotPeek actually does do this.
Consider the following code:

int i = 255;

dotPeek (unlike others, obviously) decompiled it as:

int i = byte.MaxValue;