/* NSC -- new scala compiler
* Copyright 2005 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc;
import java.io._;
import java.nio.charset._;
import scala.tools.util._;
import scala.collection.mutable.{HashSet,HashMap}
import symtab._;
import symtab.classfile.{PickleBuffer, Pickler};
import util._;
import ast._;
import ast.parser._;
import typechecker._;
import matching._;
import transform._;
class Global(val settings: Settings, val reporter: Reporter) extends SymbolTable with Trees with CompilationUnits {
// sub-components --------------------------------------------------
object treePrinters extends TreePrinters {
val global: Global.this.type = Global.this
}
val treePrinter = treePrinters.create();
object treeInfo extends TreeInfo {
val global: Global.this.type = Global.this
}
object gen extends TreeGen {
val global: Global.this.type = Global.this
}
object constfold extends ConstantFolder {
val global: Global.this.type = Global.this
}
object checker extends TreeCheckers {
val global: Global.this.type = Global.this
}
val copy = new LazyTreeCopier();
type AttrInfo = Pair[Type, List[Any]];
val attributes = new HashMap[Symbol, List[AttrInfo]];
// reporting -------------------------------------------------------
def error(msg: String) = reporter.error(null, msg);
def warning(msg: String) = reporter.warning(null, msg);
private def inform(msg: String) = reporter.info(null, msg, true);
def informProgress(msg: String) =
if (settings.verbose.value) inform("[" + msg + "]");
def informTime(msg: String, start: long) =
informProgress(msg + " in " + (System.currentTimeMillis() - start) + "ms");
def log(msg: Object): unit =
if (settings.log contains phase.name) inform("[log " + phase + "] " + msg);
// file interface -------------------------------------------------------
private val reader: SourceReader = {
def stdCharset: Charset = {
settings.encoding.value = "ISO-8859-1"; // A mandatory charset
Charset.forName(settings.encoding.value);
}
val charset =
try {
Charset.forName(settings.encoding.value);
} catch {
case _: IllegalCharsetNameException =>
error("illegal charset name '" + settings.encoding.value + "'");
stdCharset
case _: UnsupportedCharsetException =>
error("unsupported charset '" + settings.encoding.value + "'");
stdCharset
}
new SourceReader(charset.newDecoder());
}
val classPath = new ClassPath(
settings.classpath.value,
settings.sourcepath.value,
settings.bootclasspath.value,
settings.extdirs.value);
if (settings.verbose.value) {
System.out.println("classpath = " + classPath);
}
def getSourceFile(f: AbstractFile): SourceFile =
new SourceFile(f, reader.read(f));
def getSourceFile(name: String): SourceFile = {
val f = AbstractFile.getFile(name);
if (f == null) throw new FileNotFoundException(
"source file '" + name + "' could not be found");
getSourceFile(f)
}
def getSourceFile(clazz: Symbol): SourceFile = {
val f = classPath.getRoot().lookupPath(
clazz.fullNameString(File.separatorChar) + ".scala", false);
if (f == null) throw new FileNotFoundException(
"source file for " + clazz + " could not be found");
getSourceFile(f)
}
object loaders extends SymbolLoaders {
val global: Global.this.type = Global.this
}
def rootLoader: LazyType = new loaders.PackageLoader(classPath.getRoot());
// Phases ------------------------------------------------------------
object syntaxAnalyzer extends SyntaxAnalyzer {
val global: Global.this.type = Global.this
}
val parserPhase = new syntaxAnalyzer.ParserPhase(NoPhase);
val firstPhase = parserPhase;
definitions.init; // needs firstPhase to be defined, that's why it is placed here.
object analyzer extends Analyzer {
val global: Global.this.type = Global.this;
}
val typer = new analyzer.Typer(analyzer.NoContext.make(EmptyTree, definitions.RootClass, new Scope())) {
override def typed(tree: Tree, mode: int, pt: Type): Tree = {
if (settings.debug.value) log("typing [[" + tree + "]]");
val result = super.typed(tree, mode, pt);
if (settings.debug.value) log(" ==> " + result + ":" + result.tpe);
result
}
}
val infer = typer.infer;
val namerPhase = new analyzer.NamerPhase(parserPhase);
val typerPhase = new analyzer.TyperPhase(namerPhase);
object pickler extends Pickler {
val global: Global.this.type = Global.this
}
val picklePhase = new pickler.PicklePhase(typerPhase);
object refchecks extends RefChecks {
val global: Global.this.type = Global.this;
}
val refchecksPhase = new refchecks.Phase(picklePhase);
/*
object uncurry extends UnCurry {
val global: Global.this.type = Global.this;
}
val refchecksPhase = new uncurry.Phase(refchecksPhase);
*/
//object transmatcher extends TransMatcher {
// val global: Global.this.type = Global.this;
//}
//object typesAsValues extends TypesAsValues {
// val global: Global.this.type = Global.this;
//}
object sampleTransform extends SampleTransform {
val global: Global.this.type = Global.this;
}
val samplePhase = new sampleTransform.Phase(refchecksPhase);
//val transMatchPhase = new transmatcher.TransMatchPhase(picklePhase);
/*
object icode extends ICode {
val symtab: Global.this.type = Global.this
}
val codegenPhase = new icode.CodeGenPhase(erasurePhase)
abstract class CodeGenPhase(prev: Phase) extends StdPhase(prev) {
import global._;
...
}
*/
val terminalPhase = new Phase(samplePhase) {
def name = "terminal";
def run: unit = {}
}
// Units and how to compile them -------------------------------------
private var unitbuf = new ListBuffer[CompilationUnit];
private var fileset = new HashSet[AbstractFile];
private def addUnit(unit: CompilationUnit): unit = {
unitbuf += unit;
fileset += unit.source.getFile();
}
def units: Iterator[CompilationUnit] = unitbuf.elements;
/** A map from compiled top-level symbols to their source files */
val symSource = new HashMap[Symbol, AbstractFile];
/** A map from compiled top-level symbols to their picklers */
val symData = new HashMap[Symbol, PickleBuffer];
def compileSources(sources: List[SourceFile]): unit = {
val startTime = System.currentTimeMillis();
unitbuf.clear;
fileset.clear;
symSource.clear;
symData.clear;
reporter.resetCounters();
for (val source <- sources)
addUnit(new CompilationUnit(source));
phase = NoPhase.next;
while (phase != terminalPhase && reporter.errors() == 0) {
if (!(settings.skip contains phase.name)) {
val startTime = System.currentTimeMillis();
phase.run;
if (settings.print contains phase.name) treePrinter.printAll();
informTime(phase.description, startTime);
}
phase = if (settings.stop contains phase.name) terminalPhase else phase.next;
if (settings.check contains phase.name) checker.checkTrees;
}
if (settings.Xshowcls.value != "") showDef(newTermName(settings.Xshowcls.value), false);
if (settings.Xshowobj.value != "") showDef(newTermName(settings.Xshowobj.value), true);
if (reporter.errors() == 0) {
for (val Pair(sym, pickled) <- symData.elements.toList) {
sym.pos = Position.NOPOS;
if (symData contains sym) {
symData -= sym;
symData -= sym.linkedSym;
writeSymblFile(sym, pickled)
}
}
} else {
for (val Pair(sym, file) <- symSource.elements) {
sym.reset(new loaders.SourcefileLoader(file));
if (sym.isTerm) sym.moduleClass.reset(loaders.errorLoader);
}
}
informTime("total", startTime);
informStatistics;
}
def compileLate(file: AbstractFile): unit =
if (fileset == null)
throw new FatalError("No symbol file for " + file + " was found\n(This file cannot be loaded as a source file)");
else if (!(fileset contains file)) {
val unit = new CompilationUnit(getSourceFile(file));
addUnit(unit);
atPhase(parserPhase) { parserPhase(unit) }
atPhase(namerPhase) { namerPhase(unit) }
}
def compileFiles(files: List[AbstractFile]): unit =
try {
compileSources(files map getSourceFile)
} catch {
case ex: IOException => error(ex.getMessage());
}
def compile(filenames: List[String]): unit =
try {
compileSources(filenames map getSourceFile)
} catch {
case ex: IOException => error(ex.getMessage());
}
def showDef(name: Name, module: boolean): unit = {
def getSym(name: Name, module: boolean): Symbol = {
var i = name.length - 1;
while (i != 0 && name(i) != '#' && name(i) != '.') i = i - 1;
if (i == 0)
definitions.getModule(name)
else {
val root = getSym(name.subName(0, i), name(i) == '.');
var selector = name.subName(i+1, name.length);
if (module) selector = selector.toTypeName;
root.info.member(selector)
}
}
val sym = getSym(name, module);
System.err.println("" + sym.name + ":" +
(if (module) sym.tpe.symbol.info else sym.info))
}
/** Returns the file with the given suffix for the given class. */
private def getFile(clazz: Symbol, suffix: String) = {
val outdirname = settings.outdir.value;
var outdir = new File(if (outdirname == "") "." else outdirname);
val filename = clazz.fullNameString('.');
var start = 0;
var end = filename.indexOf('.', start);
while (end >= start) {
outdir = new File(outdir, filename.substring(start, end));
if (!outdir.exists()) outdir.mkdir();
start = end + 1;
end = filename.indexOf('.', start);
}
new File(outdir, filename.substring(start) + suffix)
}
private def writeSymblFile(clazz: Symbol, pickled: PickleBuffer) = {
val file = getFile(clazz, ".symbl");
try {
val stream = new FileOutputStream(file);
stream.write(pickled.bytes, 0, pickled.writeIndex);
stream.close();
informProgress("wrote " + file);
} catch {
case ex: IOException =>
if (settings.debug.value) ex.printStackTrace();
error("could not write file " + file);
}
}
private def informStatistics = {
inform("#identifiers : " + analyzer.idcnt);
inform("#selections : " + analyzer.selcnt);
inform("#applications: " + analyzer.appcnt);
inform("#implicits : " + analyzer.implcnt);
}
}