package org.jruby.ir.instructions;
import org.jruby.RubyArray;
import org.jruby.RubyNil;
import org.jruby.RubyProc;
import org.jruby.ir.IRVisitor;
import org.jruby.ir.Interp;
import org.jruby.ir.Operation;
import org.jruby.ir.operands.Operand;
import org.jruby.ir.operands.UndefinedValue;
import org.jruby.ir.operands.Variable;
import org.jruby.ir.transformations.inlining.InlinerInfo;
import org.jruby.runtime.Block;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import java.util.Map;
public class YieldInstr extends Instr implements ResultInstr {
public final boolean unwrapArray;
private Operand blockArg;
private Operand yieldArg;
private Variable result;
public YieldInstr(Variable result, Operand block, Operand arg, boolean unwrapArray) {
super(Operation.YIELD);
assert result != null: "YieldInstr result is null";
this.blockArg = block;
this.yieldArg = arg == null ? UndefinedValue.UNDEFINED : arg;
this.unwrapArray = unwrapArray;
this.result = result;
}
@Override
public Instr cloneForInlining(InlinerInfo ii) {
return new YieldInstr(ii.getRenamedVariable(result), blockArg.cloneForInlining(ii), yieldArg.cloneForInlining(ii), unwrapArray);
}
public Operand getBlockArg() {
return blockArg;
}
public Operand getYieldArg() {
return yieldArg;
}
@Override
public String toString() {
return unwrapArray ? (super.toString() + "(" + blockArg + ", UNWRAP(" + yieldArg + "))") : (super.toString() + "(" + blockArg + ", " + yieldArg + ")");
}
// if unwrapArray, maybe convert yieldArg into a CompoundArray operand?
public Operand[] getOperands() {
return new Operand[] {blockArg, yieldArg};
}
public Variable getResult() {
return result;
}
public void updateResult(Variable v) {
this.result = v;
}
public Operand[] getNonBlockOperands() {
return new Operand[] {yieldArg};
}
@Override
public void simplifyOperands(Map<Operand, Operand> valueMap, boolean force) {
blockArg = blockArg.getSimplifiedOperand(valueMap, force);
yieldArg = yieldArg.getSimplifiedOperand(valueMap, force);
}
@Interp
@Override
public Object interpret(ThreadContext context, DynamicScope currDynScope, IRubyObject self, Object[] temp, Block block) {
Object resultValue;
Object blk = (Object) blockArg.retrieve(context, self, currDynScope, temp);
if (blk instanceof RubyProc) blk = ((RubyProc)blk).getBlock();
if (blk instanceof RubyNil) blk = Block.NULL_BLOCK;
Block b = (Block)blk;
// Ruby 1.8 mode: yields are always to normal blocks
if (!context.runtime.is1_9()) b.type = Block.Type.NORMAL;
if (yieldArg == UndefinedValue.UNDEFINED) {
return b.yieldSpecific(context);
} else {
IRubyObject yieldVal = (IRubyObject)yieldArg.retrieve(context, self, currDynScope, temp);
return (unwrapArray && (yieldVal instanceof RubyArray)) ? b.yieldArray(context, yieldVal, null, null) : b.yield(context, yieldVal);
}
}
@Override
public void visit(IRVisitor visitor) {
visitor.YieldInstr(this);
}
}