C++ Metaprogramming/ Open Compilers (1)
	l Expression Templates • Extend STL(Standard Template Library) • Encode structure of expression into types • Compiles X = A + B + C into for i X[i] = A[i] + B[i] + C[i] loop into compile time (not for i T[I] = A[I]+B[I]; for i X[I]=T[I]+C[I] ) l Template Metaprogramming • Generalize Expression Templates • High-performance numerical computing • A++/P++ Blitz++, MTL (Matrix Template Library), etc.