revivalizer

// RAII FPU state class, sets FTZ and DAZ and rounding, no exceptions 
// Adapted from code by mystran @ kvraudio
// http://www.kvraudio.com/forum/viewtopic.php?t=312228&postdays=0&postorder=asc&start=0

class ZFPUState
{ 
private:
	unsigned int sse_control_store; 

public: 

revivalizer

// Include font data
namespace cheri
{
	#include "font_cheri.ttf.bin.h"
}

// Convenience font class
// This class uses OpenGL 3.3 array buffers to draw characters
class Font
{

revivalizer

Chaining function calls via the dot operator is a very common thing to do in C++. Of course, you chain things because it's nice, and easier to read than nested function calls. The prototypical use case is matrix composition:

auto m = Matrix::Indentity().RotateX(145.0).RotateY(-90.0).Scale(2.0);

Which seems preferable to

auto m = Scale(RotateY(RotateX(Matrix::Identity, 145.0), -90.0), 2.0).

Usually, dot chaining is implemented by return *this from Scale, RotateX, RotateY, and having those functions be part of the Matrix class. This is usually a brilliant way to work.

revivalizer

// Had to cut some stuff out that distracted from the main point, so maybe it doesn't compile, but...
struct calculator {
  bool Succes;
  const char* Start;
  const char* FailAt;
  const char* Error;
  const char* C;

  real Compute(const char* ExprStr) {
    Succes = true;