Module optimizer 

Transformation routines to optimize an Expression AST.

Functions

fold_constants

Evaluates Expression::Unary, Expression::Binary Expression::Array into a single Expression::Literal if all arguments are also an Expression::Literal.

optimize

Transforms an Expression tree by applying transform_ternary and fold_constants in a loop until no further optimization is possible.

transform_ternary

Recursivly transforms ternary function calls into Expression::Ternary. Three parameter crate::stdlib::common::if_then calls are transformed into a Operator::TernaryCondition;