st_expr.pl -- Expression evaluator

Evaluates expression. Allows registering of global constants and user-defined functions.

 st_set_function(+Name, +Arity, :Goal) is det

Registers new function. Goal must have arity Arity + 1. Last argument of goal is used as the return value.

 st_set_global(+Name, +Value) is det

Sets the global value. Value must be ground. Overwrites the existing global with the same name.

Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 st_eval(Arg1, Arg2, Arg3, Arg4)