Pliant

Pliant is a reflexive language[?] based on a dynamic compiler: it is possible for a Pliant program to modify the parser, the compiler, the code generator and the code optimizer.

The core advantage of the Pliant language is its ability to allow several levels of programming, from high-level expression manipulation to low-level instruction lists. Thatfor, it stresses the "compilation rules" definitions using "meta" functions (functions run at compile time to compile an expression) and "active types" (types having their own compilation scheme).

Pliant's (default) syntax is almost trivial and based on indentation.