package org.simantics.scl.compiler.elaboration.java;

import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
import org.simantics.scl.compiler.constants.FunctionValue;
import org.simantics.scl.compiler.internal.codegen.references.Val;
import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
import org.simantics.scl.compiler.types.TVar;
import org.simantics.scl.compiler.types.Type;
import org.simantics.scl.compiler.types.Types;
import org.simantics.scl.compiler.types.exceptions.MatchException;
import org.simantics.scl.compiler.types.kinds.Kinds;

public class FreezeMVector extends FunctionValue {
    private static final TVar A = Types.var(Kinds.STAR);  
    
    public FreezeMVector() {
        super(new TVar[] {A}, Types.PROC, Types.vector(A), Types.mvector(A));
    }
    
    @Override
    public Type applyExact(MethodBuilder mb, Val[] parameters) {
        Val vectorVar = parameters[0];
        
        vectorVar.push(mb);        
        
        try {
            Type elementType = Types.canonical(
                    Types.matchApply(Types.MVECTOR, vectorVar.getType()));
            return Types.vector(elementType);
        } catch (MatchException e) {
            throw new InternalCompilerError(e);
        }
    }   

}