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/* NSC -- new scala compiler
* Copyright 2005-2012 LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package backend
package icode
import java.io.PrintWriter
import scala.tools.nsc.symtab.Flags
import scala.reflect.internal.util.Position
trait Printers { self: ICodes =>
import global._
import global.icodes.opcodes._
import global.icodes._
class TextPrinter(writer: PrintWriter, lin: Linearizer) {
private var margin = 0
private var out = writer
final val TAB = 2
def setWriter(w: PrintWriter) { out = w }
def indent() { margin += TAB }
def undent() { margin -= TAB }
def print(s: String) { out.print(s) }
def print(o: Any) { print(o.toString()) }
def println(s: String) {
print(s);
println
}
def println() {
out.println()
var i = 0
while (i < margin) {
print(" ");
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)
}
def printClass(cls: IClass) {
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) {
print(f.symbol.keyString); print(" ");
print(f.symbol.nameString); print(": ");
println(f.symbol.info.toString());
}
def printMethod(m: IMethod) {
print("def "); print(m.symbol.name);
print("("); printList(printParam)(m.params, ", "); print(")");
print(": "); print(m.symbol.info.resultType)
if (!m.isAbstractMethod) {
println(" {")
println("locals: " + m.locals.mkString("", ", ", ""))
println("startBlock: " + m.startBlock)
println("blocks: " + m.code.blocks.mkString("[", ",", "]"))
println
lin.linearize(m) foreach printBlock
println("}")
indent; println("Exception handlers: ")
m.exh foreach printExceptionHandler
undent; println
} else
println
}
def printParam(p: Local) {
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.toSeq.sortBy(_.label) + " starting at: " + e.startBlock);
println("consisting of blocks: " + e.blocks);
undent;
println("with finalizer: " + e.finalizer);
// linearizer.linearize(e.startBlock) foreach printBlock;
}
def printBlock(bb: BasicBlock) {
print(bb.label)
if (bb.loopHeader) print("[loop header]")
print(": ");
if (settings.debug.value) print("pred: " + bb.predecessors + " succs: " + bb.successors + " flags: " + bb.flagsString)
indent; println
bb.toList foreach printInstruction
undent; println
}
def printInstruction(i: Instruction) {
// if (settings.Xdce.value)
// print(if (i.useful) " " else " * ");
if (i.pos.isDefined) print(i.pos.line.toString + "\t") else print("?\t")
println(i.toString())
}
}
}
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