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Compiler implementation of the D programming language.

Source optimize.d

Expression expandVar(int result, VarDeclaration v);
If variable has a const initializer, return that initializer.
initializer if there is one, null if not, ErrorExp if error
Expression Expression_optimize(Expression e, int result, bool keepLvalue);
Constant fold an Expression.
Expression e expression to const fold; this may get modified in-place
int result WANTvalue, WANTexpand, or both
bool keepLvalue e is an lvalue, and keep it as an lvalue since it is an argument to a ref or out parameter, or the operand of & operator
Constant folded version of e