prompto.literal.CharacterLiteral Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of Core Show documentation

The newest version!

package prompto.literal;

import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;

import prompto.compiler.ByteOperand;
import prompto.compiler.CompilerUtils;
import prompto.compiler.Flags;
import prompto.compiler.IntConstant;
import prompto.compiler.MethodInfo;
import prompto.compiler.Opcode;
import prompto.compiler.ResultInfo;
import prompto.compiler.ShortOperand;
import prompto.runtime.Context;
import prompto.transpiler.Transpiler;
import prompto.type.CharacterType;
import prompto.type.IType;
import prompto.value.CharacterValue;


public class CharacterLiteral extends Literal {

	public CharacterLiteral(String text) {
		super(text,unescape(text));
	}

	private static CharacterValue unescape(String text) {
		StreamTokenizer parser = new StreamTokenizer(new StringReader(text));
		try {
		  parser.nextToken();
		  return new CharacterValue(parser.sval.charAt(0));
		}
		catch (IOException e) {
		  throw new RuntimeException(e);
		}
	}

	@Override
	public IType check(Context context) {
		return CharacterType.instance();
	}
	
	@Override
	public ResultInfo compile(Context context, MethodInfo method, Flags flags) {
		char c = value.getValue();
		if((c&0xFFFFFF00)==0)
			method.addInstruction(Opcode.BIPUSH, new ByteOperand((byte)c));
		else if((c&0xFFFF0000)==0)
			method.addInstruction(Opcode.SIPUSH, new ShortOperand((short)c));
		else
			method.addInstruction(Opcode.LDC_W, new IntConstant(c));
		return CompilerUtils.charToCharacter(method);
	}

	@Override
	public void declare(Transpiler transpiler) {
		// nothing to do
	}

	@Override
	public boolean transpile(Transpiler transpiler) {
		transpiler.append(text.get());
		return false;
	}

}