"multi.isbpl: Library for creating and controlling other ISBPL contexts." # 
"This library is not supported when using a modded ISBPL.java, but it should be usable unless core functions are changed." #

"obtain ISBPL class (we don't know its package, so we use this workaround)" #
def ISBPL JIO context getClass0 getName0 JIO class =ISBPL
def ISBPLStack JIO stack getClass0 getName0 JIO class =ISBPLStack
def File "java.io.File" JIO class =File
"wrapper for jContext" #
def Context construct Context {
    jContext # "real context"
    ;
    construct {
        def this =this
        ISBPL new0 this =jContext
        "native include \"#std.isbpl\" include" this eval
        this
    }
    eval {
        def this =this
        "multi.isbpl:_eval" File new1 swap JIO stack this jContext interpret3
    }
    makeStack {
        pop
        ISBPLStack new0
    }
    evalNewStack {
        def this =this
        def stack
        "multi.isbpl:_eval" File new1 swap ISBPLStack new0 dup =stack this jContext interpret3
        stack
    }
    evalCustom {
        def this =this
        def stack =stack
        def toRun =toRun
        "multi.isbpl:_eval" File new1 toRun stack this jContext interpret3
        stack
    }
    copyFunc {
        def this =this
        swap this jContext level0 add2
    }
} =Context