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/* NSC -- new scala compiler
* Copyright 2005 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc.backend.icode;
import java.io.PrintWriter;
import scala.tools.nsc.util.Position;
import scala.tools.nsc.symtab.Flags;
abstract class Printers {
val global: Global;
import global._;
import global.icodes.opcodes._;
import global.icodes._;
class TextPrinter(writer: PrintWriter, lin: Linearizer) {
var margin = 0;
var out = writer;
final val TAB = 2;
def setWriter(w: PrintWriter) = (out = w);
def indent = margin = margin + TAB;
def undent = margin = margin - TAB;
def print(s: String) = out.print(s);
def print(o: Any): Unit = print(o.toString());
def println(s: String): Unit = {
print(s);
println
}
def println = {
out.println();
var i = 0;
while (i < margin) {
print(" ");
i = i + 1;
}
}
def printList[a](l: List[a], sep: String): Unit = l match {
case Nil => ();
case x :: Nil => print(x);
case x :: xs => print(x); print(sep); printList(xs, sep);
}
def printList[a](pr: a => Unit)(l: List[a], sep: String): Unit = l match {
case Nil => ();
case x :: Nil => pr(x);
case x :: xs => pr(x); print(sep); printList(pr)(xs, sep);
}
private var clazz : IClass = _;
def printClass(cls: IClass): Unit = {
this.clazz = cls;
print(cls.symbol.toString()); print(" extends ");
printList(cls.symbol.info.parents, ", ");
indent; println(" {");
println("// fields:");
cls.fields.foreach(printField); println;
println("// methods");
cls.methods.foreach(printMethod);
undent; println;
println("}");
}
def printField(f: IField): Unit = {
print(f.symbol.keyString); print(" ");
print(f.symbol.nameString); print(": ");
println(f.symbol.info.toString());
}
def printMethod(m: IMethod): Unit = {
print("def "); print(m.symbol.name);
print("("); printList(printParam)(m.params.reverse, ", "); print(")");
print(": "); print(m.symbol.info.resultType);
if (!m.isDeferred) {
println(" {");
println("locals: " + m.locals.mkString("", ", ", ""));
println("startBlock: " + m.code.startBlock);
println;
lin.linearize(m) foreach printBlock;
println("}");
indent;println("Exception handlers: ");
m.exh foreach printExceptionHandler;
undent;println;
} else
println;
}
def printParam(p: Local): Unit = {
print(p.sym.name); print(": "); print(p.sym.info);
print(" ("); print(p.kind); print(")");
}
def printExceptionHandler(e: ExceptionHandler) = {
indent;
println("catch (" + e.cls.simpleName + ") in " + e.covered + " starting at: " + e.startBlock);
undent;
println("with finalizer: " + e.finalizer);
// linearizer.linearize(e.startBlock) foreach printBlock;
}
def printBlock(bb: BasicBlock): Unit = {
print(bb.label);
if (bb.loopHeader) print("[loop header]");
print(": "); indent; println;
bb.toList foreach printInstruction;
undent; println;
}
def printInstruction(i: Instruction): Unit = {
// if (settings.debug.value)
// print("/* " + Position.line(clazz.cunit.source, i.pos) + " */ ");
println(i.toString());
}
}
}
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