Helper EvaluableQuali

Jan Burse, created Apr 03. 2019
package jekpro.reference.runtime;
import jekpro.model.inter.AbstractSpecial;
import jekpro.model.inter.Engine;
import jekpro.model.molec.Display;
import jekpro.model.molec.EngineException;
import jekpro.model.molec.EngineMessage;
import jekpro.tools.term.SkelAtom;
import jekpro.tools.term.SkelCompound;
/**
* <p>Provides built-in predicates for qualified evaluation.</p>
* <p/>
* Warranty & Liability
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* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
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* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class EvaluableQuali extends AbstractSpecial {
private final static int EVALUABLE_COLON = 0;
private final static int EVALUABLE_COLONCOLON = 1;
/**
* <p>Create an evaluable quali.</p>
*
* @param i The index.
*/
public EvaluableQuali(int i) {
super(i);
switch (i) {
case EVALUABLE_COLON:
case EVALUABLE_COLONCOLON:
subflags |= MASK_DELE_VIRT;
subflags |= MASK_DELE_ARIT;
break;
default:
throw new IllegalArgumentException(AbstractSpecial.OP_ILLEGAL_SPECIAL);
}
}
/**
* <p>Arithmetically evaluate an evaluable.</p>
* <p>The evaluable is passed via the skel and display of the engine.</p>
* <p>The continuation is passed via the contskel and contdisplay of the engine.</p>
* <p>The result is passed via the skel and display of the engine.</p>
*
* @param en The engine.
* @throws EngineMessage Shit happens.
*/
public final void moniEvaluate(Engine en)
throws EngineMessage, EngineException {
switch (id) {
case EVALUABLE_COLON:
SkelCompound temp = (SkelCompound) en.skel;
Display ref = en.display;
Object obj = SpecialQuali.slashToClass(temp.args[0], ref, false, true, en);
SkelAtom mod = SpecialQuali.modToAtom(obj, temp.args[0], ref, en);
SpecialQuali.colonToCallable(temp.args[1], ref, true, en);
SpecialQuali.colonToRoutine(mod, temp.sym, true, en);
ref = en.display;
boolean multi = ref.getAndReset();
en.computeExpr(en.skel, ref);
if (multi)
ref.remTab(en);
return;
case EVALUABLE_COLONCOLON:
temp = (SkelCompound) en.skel;
ref = en.display;
en.skel = temp.args[0];
en.display = ref;
en.deref();
Object recv = en.skel;
Display d2 = en.display;
obj = SpecialQuali.slashToClass(recv, d2, true, true, en);
mod = SpecialQuali.objToAtom(obj, recv, d2, en);
SpecialQuali.colonToCallable(temp.args[1], ref, true, en);
SpecialQuali.colonToMethod(mod, temp.sym, recv, d2, true, en);
ref = en.display;
multi = ref.getAndReset();
en.computeExpr(en.skel, ref);
if (multi)
ref.remTab(en);
return;
default:
throw new IllegalArgumentException(AbstractSpecial.OP_ILLEGAL_SPECIAL);
}
}
}

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