Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

sdk/lib/_internal/compiler/implementation/helpers/trace.dart

Index: sdk/lib/_internal/compiler/implementation/helpers/trace.dart
diff --git a/sdk/lib/_internal/compiler/implementation/helpers/trace.dart b/sdk/lib/_internal/compiler/implementation/helpers/trace.dart
deleted file mode 100644
index a6bdcf67c2b307ef405b834893223cec8822ca6f..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/compiler/implementation/helpers/trace.dart
+++ /dev/null
@@ -1,333 +0,0 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of dart2js.helpers;
-
-/// Function signature for [trace].
-typedef void Trace(String message,
-                   {bool condition(String stackTrace),
-                    int limit,
-                    bool throwOnPrint});
-
-/**
- * Helper method for printing stack traces for debugging.
- *
- * [message] is printed as the header of the stack trace.
- *
- * If [condition] is provided, the stack trace is only printed if [condition]
- * returns [:true:] on the stack trace text. This can be used to filter the
- * printed stack traces based on their content. For instance only print stack
- * traces that contain specific paths.
- *
- * If [limit] is provided, the stack trace is limited to [limit] entries.
- *
- * If [throwOnPrint] is `true`, [message] will be thrown after the stack trace
- * has been printed. Together with [condition] this can be used to discover
- * unknown call-sites in tests by filtering known call-sites and throwning
- * otherwise.
- */
-Trace get trace {
-  enableDebugMode();
-  return _trace;
-}
-
-void _trace(String message, {bool condition(String stackTrace), int limit,
-                             bool throwOnPrint: false}) {
-  try {
-    throw '';
-  } catch (e, s) {
-    String stackTrace;
-    try {
-      stackTrace = prettifyStackTrace(
-          s, rangeStart: 1, rangeEnd: limit, filePrefix: stackTraceFilePrefix);
-    } catch (e) {
-      print(e);
-      stackTrace = '$s';
-    }
-    if (condition != null) {
-      if (!condition(stackTrace)) return;
-    }
-    print('$message\n$stackTrace');
-    if (throwOnPrint) throw message;
-  }
-}
-
-/// Function signature of [traceAndReport].
-typedef void TraceAndReport(Compiler compiler, Spannable node, String message,
-                            {bool condition(String stackTrace), int limit,
-                             bool throwOnPrint});
-
-/// Calls [reportHere] and [trace] with the same message.
-TraceAndReport get traceAndReport {
-  enableDebugMode();
-  return _traceAndReport;
-}
-
-/// Calls [reportHere] and [trace] with the same message.
-TraceAndReport get reportAndTrace => traceAndReport;
-
-/// Implementation of [traceAndReport].
-void _traceAndReport(Compiler compiler, Spannable node, String message,
-                     {bool condition(String stackTrace), int limit,
-                      bool throwOnPrint: false}) {
-
-  trace(message, limit: limit, throwOnPrint: throwOnPrint,
-        condition: (String stackTrace) {
-    bool result = condition != null ? condition(stackTrace) : true;
-    if (result) {
-      reportHere(compiler, node, message);
-    }
-    return result;
-  });
-}
-
-/// Returns the [StackTraceLines] for the current call stack.
-///
-/// Use [offset] to discard the first [offset] calls of the call stack. Defaults
-/// to `1`, that is, discard the call to [stackTrace] itself. Use [limit] to
-/// limit the length of the stack trace lines.
-StackTraceLines stackTrace({int offset: 1,
-                            int limit: null}) {
-  int rangeStart = offset;
-  int rangeEnd = limit == null ? null : rangeStart + limit;
-  try {
-    throw '';
-  } catch (_, stackTrace) {
-    return new StackTraceLines.fromTrace(stackTrace,
-        rangeStart: offset, rangeEnd: rangeEnd,
-        filePrefix: stackTraceFilePrefix);
-  }
-  return null;
-}
-
-/// A stack trace as a sequence of [StackTraceLine]s.
-class StackTraceLines {
-  final List<StackTraceLine> lines;
-  final int maxFileLength;
-  final int maxLineNoLength;
-  final int maxColumnNoLength;
-
-  factory StackTraceLines.fromTrace(StackTrace s,
-                                    {int rangeStart,
-                                     int rangeEnd,
-                                     String filePrefix,
-                                     String lambda: r'?'}) {
-    final RegExp indexPattern = new RegExp(r'#\d+\s*');
-    int index = -1;
-    int maxFileLength = 0;
-    int maxLineNoLength = 0;
-    int maxColumnNoLength = 0;
-
-    String stackTrace = '$s';
-    List<StackTraceLine> lines = <StackTraceLine>[];
-    // Parse each line in the stack trace. The supported line formats from the
-    // Dart VM are:
-    //    #n     <method-name> (<uri>:<line-no>:<column-no>)
-    //    #n     <method-name> (<uri>:<line-no>)
-    // in which '<anonymous closure>' is the name used for an (unnamed) function
-    // expression.
-    for (String line in stackTrace.split('\n')) {
-      try {
-        index++;
-        if (rangeStart != null && index < rangeStart) continue;
-        if (rangeEnd != null && index > rangeEnd) break;
-        if (line.isEmpty) continue;
-
-        // Strip index.
-        line = line.replaceFirst(indexPattern, '');
-
-        int leftParenPos = line.indexOf('(');
-        int rightParenPos = line.indexOf(')', leftParenPos);
-        int lastColon = line.lastIndexOf(':', rightParenPos);
-        int nextToLastColon = line.lastIndexOf(':', lastColon-1);
-
-        String lineNo;
-        String columnNo;
-        if (nextToLastColon != -1) {
-          lineNo = line.substring(nextToLastColon+1, lastColon);
-          columnNo = line.substring(lastColon+1, rightParenPos);
-          try {
-            int.parse(lineNo);
-          } on FormatException catch (e) {
-            lineNo = columnNo;
-            columnNo = '';
-            nextToLastColon = lastColon;
-          }
-        } else {
-          lineNo = line.substring(lastColon+1, rightParenPos);
-          columnNo = '';
-          nextToLastColon = lastColon;
-        }
-
-        if (lineNo.length > maxLineNoLength) {
-          maxLineNoLength = lineNo.length;
-        }
-        if (columnNo.length > maxColumnNoLength) {
-          maxColumnNoLength = columnNo.length;
-        }
-
-        String file = line.substring(leftParenPos+1, nextToLastColon);
-        if (filePrefix != null && file.startsWith(filePrefix)) {
-          file = file.substring(filePrefix.length);
-        }
-        if (file.length > maxFileLength) {
-          maxFileLength = file.length;
-        }
-        String method = line.substring(0, leftParenPos-1);
-        if (lambda != null) {
-          method = method.replaceAll('<anonymous closure>', lambda);
-        }
-        lines.add(new StackTraceLine(index, file, lineNo, columnNo, method));
-      } catch (e) {
-        throw 'Error prettifying "$line": $e';
-      }
-    }
-    return new StackTraceLines.fromLines(
-        lines, maxFileLength, maxLineNoLength, maxColumnNoLength);
-  }
-
-  StackTraceLines.fromLines(this.lines,
-                            this.maxFileLength,
-                            this.maxLineNoLength,
-                            this.maxColumnNoLength);
-
-  StackTraceLines subtrace(int offset) {
-    return new StackTraceLines.fromLines(
-        lines.sublist(offset),
-        maxFileLength,
-        maxLineNoLength,
-        maxColumnNoLength);
-  }
-
-  String prettify({bool showColumnNo: false,
-                   bool showDots: true}) {
-    StringBuffer sb = new StringBuffer();
-    bool dots = true;
-    for (StackTraceLine line in lines) {
-      sb.write('  ');
-      line.printOn(sb,
-        fileLength: maxFileLength,
-        padding: showDots && dots ? ' .' : ' ',
-        lineNoLength: maxLineNoLength,
-        showColumnNo: showColumnNo,
-        columnNoLength: maxColumnNoLength);
-
-      dots = !dots;
-    }
-    return sb.toString();
-  }
-
-  String toString() {
-    return prettify();
-  }
-}
-
-/// A parsed line from a stack trace.
-class StackTraceLine {
-  final int index;
-  final String file;
-  final String lineNo;
-  final String columnNo;
-  final String method;
-
-  StackTraceLine(this.index, this.file, this.lineNo,
-                  this.columnNo, this.method);
-
-  void printOn(StringBuffer sb,
-               {String padding: ' ',
-                int fileLength,
-                int lineNoLength,
-                int columnNoLength,
-                bool showColumnNo: false}) {
-    String fileText = '${file} ';
-    if (fileLength != null) {
-      fileText = pad(fileText, fileLength, dots: padding);
-    }
-    String lineNoText = lineNo;
-    if (lineNoLength != null) {
-      lineNoText = pad(lineNoText, lineNoLength, padLeft: true);
-    }
-    String columnNoText = showColumnNo ? '': columnNo;
-    if (columnNoLength != null) {
-        columnNoText = ':${pad(columnNoText, columnNoLength)}';
-    }
-    sb.write('$fileText $lineNoText$columnNoText $method\n');
-  }
-
-  int get hashCode {
-    return 13 * index +
-           17 * file.hashCode +
-           19 * lineNo.hashCode +
-           23 * columnNo.hashCode +
-           29 * method.hashCode;
-  }
-
-  bool operator ==(other) {
-    if (identical(this, other)) return true;
-    if (other is! StackTraceLine) return false;
-    return index == other.index &&
-           file == other.file &&
-           lineNo == other.lineNo &&
-           columnNo == other.columnNo &&
-           method == other.method;
-  }
-
-  String toString() => "$method @ $file [$lineNo:$columnNo]";
-}
-
-// TODO(johnniwinther): Use this format for --throw-on-error.
-/**
- * Converts the normal VM stack trace into a more compact and readable format.
- *
- * The output format is [: <file> . . . <lineNo>:<columnNo> <method> :] where
- * [: <file> :] is file name, [: <lineNo> :] is the line number,
- * [: <columnNo> :] is the column number, and [: <method> :] is the method name.
- *
- * If [rangeStart] and/or [rangeEnd] are provided, only the lines within the
- * range are included.
- * If [showColumnNo] is [:false:], the [: :<columnNo> :] part is omitted.
- * If [showDots] is [:true:], the space between [: <file> :] and [: <lineNo> :]
- * is padded with dots on every other line.
- * If [filePrefix] is provided, then for  every file name thats starts with
- * [filePrefix] only the remainder is printed.
- * If [lambda] is non-null, anonymous closures are printed as [lambda].
- */
-String prettifyStackTrace(StackTrace stackTrace,
-                          {int rangeStart,
-                           int rangeEnd,
-                           bool showColumnNo: false,
-                           bool showDots: true,
-                           String filePrefix,
-                           String lambda: r'?'}) {
-  return new StackTraceLines.fromTrace(stackTrace,
-      rangeStart: rangeStart, rangeEnd: rangeEnd,
-      filePrefix: filePrefix, lambda: lambda)
-    .prettify(showColumnNo: showColumnNo, showDots: showDots);
-}
-
-/**
- * Pads (or truncates) [text] to the [intendedLength].
- *
- * If [padLeft] is [:true:] the text is padding inserted to the left of [text].
- * A repetition of the [dots] text is used for padding.
- */
-String pad(String text, int intendedLength,
-           {bool padLeft: false, String dots: ' '}) {
-  if (text.length == intendedLength) return text;
-  if (text.length > intendedLength) return text.substring(0, intendedLength);
-  if (dots == null || dots.isEmpty) dots = ' ';
-  int dotsLength = dots.length;
-  StringBuffer sb = new StringBuffer();
-  if (!padLeft) {
-    sb.write(text);
-  }
-  for (int index = text.length ; index < intendedLength ; index ++) {
-    int dotsIndex = index % dotsLength;
-    sb.write(dots.substring(dotsIndex, dotsIndex + 1));
-  }
-  if (padLeft) {
-    sb.write(text);
-  }
-  return sb.toString();
-}