Delete a bunch of packages that are now on GitHub.

pkg/yaml/lib/src/loader.dart

Index: pkg/yaml/lib/src/loader.dart
diff --git a/pkg/yaml/lib/src/loader.dart b/pkg/yaml/lib/src/loader.dart
deleted file mode 100644
index d80578fc95cf9c3fb9780b577cfdbdbcdecfa261..0000000000000000000000000000000000000000
--- a/pkg/yaml/lib/src/loader.dart
+++ /dev/null
@@ -1,257 +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.
-
-library yaml.loader;
-
-import 'package:source_span/source_span.dart';
-
-import 'equality.dart';
-import 'event.dart';
-import 'parser.dart';
-import 'yaml_document.dart';
-import 'yaml_exception.dart';
-import 'yaml_node.dart';
-
-/// A loader that reads [Event]s emitted by a [Parser] and emits
-/// [YamlDocument]s.
-///
-/// This is based on the libyaml loader, available at
-/// https://github.com/yaml/libyaml/blob/master/src/loader.c. The license for
-/// that is available in ../../libyaml-license.txt.
-class Loader {
-  /// The underlying [Parser] that generates [Event]s.
-  final Parser _parser;
-
-  /// Aliases by the alias name.
-  final _aliases = new Map<String, YamlNode>();
-
-  /// The span of the entire stream emitted so far.
-  FileSpan get span => _span;
-  FileSpan _span;
-
-  /// Creates a loader that loads [source].
-  ///
-  /// [sourceUrl] can be a String or a [Uri].
-  Loader(String source, {sourceUrl})
-      : _parser = new Parser(source, sourceUrl: sourceUrl) {
-    var event = _parser.parse();
-    _span = event.span;
-    assert(event.type == EventType.STREAM_START);
-  }
-
-  /// Loads the next document from the stream.
-  ///
-  /// If there are no more documents, returns `null`.
-  YamlDocument load() {
-    if (_parser.isDone) return null;
-
-    var event = _parser.parse();
-    if (event.type == EventType.STREAM_END) {
-      _span = _span.expand(event.span);
-      return null;
-    }
-
-    var document = _loadDocument(event);
-    _span = _span.expand(document.span);
-    _aliases.clear();
-    return document;
-  }
-
-  /// Composes a document object.
-  YamlDocument _loadDocument(DocumentStartEvent firstEvent) {
-    var contents = _loadNode(_parser.parse());
-
-    var lastEvent = _parser.parse();
-    assert(lastEvent.type == EventType.DOCUMENT_END);
-
-    return new YamlDocument.internal(
-        contents,
-        firstEvent.span.expand(lastEvent.span),
-        firstEvent.versionDirective,
-        firstEvent.tagDirectives,
-        startImplicit: firstEvent.isImplicit,
-        endImplicit: lastEvent.isImplicit);
-  }
-
-  /// Composes a node.
-  YamlNode _loadNode(Event firstEvent) {
-    switch (firstEvent.type) {
-      case EventType.ALIAS: return _loadAlias(firstEvent);
-      case EventType.SCALAR: return _loadScalar(firstEvent);
-      case EventType.SEQUENCE_START: return _loadSequence(firstEvent);
-      case EventType.MAPPING_START: return _loadMapping(firstEvent);
-      default: throw "Unreachable";
-    }
-  }
-
-  /// Registers an anchor.
-  void _registerAnchor(String anchor, YamlNode node) {
-    if (anchor == null) return;
-
-    // libyaml throws an error for duplicate anchors, but example 7.1 makes it
-    // clear that they should be overridden:
-    // http://yaml.org/spec/1.2/spec.html#id2786448.
-
-    _aliases[anchor] = node;
-  }
-
-  /// Composes a node corresponding to an alias.
-  YamlNode _loadAlias(AliasEvent event) {
-    var alias = _aliases[event.name];
-    if (alias != null) return alias;
-
-    throw new YamlException("Undefined alias.", event.span);
-  }
-
-  /// Composes a scalar node.
-  YamlNode _loadScalar(ScalarEvent scalar) {
-    var node;
-    if (scalar.tag == "!") {
-      node = _parseString(scalar);
-    } else if (scalar.tag != null) {
-      node = _parseByTag(scalar);
-    } else {
-      node = _parseNull(scalar);
-      if (node == null) node = _parseBool(scalar);
-      if (node == null) node = _parseInt(scalar);
-      if (node == null) node = _parseFloat(scalar);
-      if (node == null) node = _parseString(scalar);
-    }
-
-    _registerAnchor(scalar.anchor, node);
-    return node;
-  }
-
-  /// Composes a sequence node.
-  YamlNode _loadSequence(SequenceStartEvent firstEvent) {
-    if (firstEvent.tag != "!" && firstEvent.tag != null &&
-        firstEvent.tag != "tag:yaml.org,2002:seq") {
-      throw new YamlException("Invalid tag for sequence.", firstEvent.span);
-    }
-
-    var children = [];
-    var node = new YamlList.internal(
-        children, firstEvent.span, firstEvent.style);
-    _registerAnchor(firstEvent.anchor, node);
-
-    var event = _parser.parse();
-    while (event.type != EventType.SEQUENCE_END) {
-      children.add(_loadNode(event));
-      event = _parser.parse();
-    }
-
-    setSpan(node, firstEvent.span.expand(event.span));
-    return node;
-  }
-
-  /// Composes a mapping node.
-  YamlNode _loadMapping(MappingStartEvent firstEvent) {
-    if (firstEvent.tag != "!" && firstEvent.tag != null &&
-        firstEvent.tag != "tag:yaml.org,2002:map") {
-      throw new YamlException("Invalid tag for mapping.", firstEvent.span);
-    }
-
-    var children = deepEqualsMap();
-    var node = new YamlMap.internal(
-        children, firstEvent.span, firstEvent.style);
-    _registerAnchor(firstEvent.anchor, node);
-
-    var event = _parser.parse();
-    while (event.type != EventType.MAPPING_END) {
-      var key = _loadNode(event);
-      var value = _loadNode(_parser.parse());
-      children[key] = value;
-      event = _parser.parse();
-    }
-
-    setSpan(node, firstEvent.span.expand(event.span));
-    return node;
-  }
-
-  /// Parses a scalar according to its tag name.
-  YamlScalar _parseByTag(ScalarEvent scalar) {
-    switch (scalar.tag) {
-      case "tag:yaml.org,2002:null": return _parseNull(scalar);
-      case "tag:yaml.org,2002:bool": return _parseBool(scalar);
-      case "tag:yaml.org,2002:int": return _parseInt(scalar);
-      case "tag:yaml.org,2002:float": return _parseFloat(scalar);
-      case "tag:yaml.org,2002:str": return _parseString(scalar);
-    }
-    throw new YamlException('Undefined tag: ${scalar.tag}.', scalar.span);
-  }
-
-  /// Parses a null scalar.
-  YamlScalar _parseNull(ScalarEvent scalar) {
-    // TODO(nweiz): stop using regexps.
-    // TODO(nweiz): add ScalarStyle and implicit metadata to the scalars.
-    if (new RegExp(r"^(null|Null|NULL|~|)$").hasMatch(scalar.value)) {
-      return new YamlScalar.internal(null, scalar.span, scalar.style);
-    } else {
-      return null;
-    }
-  }
-
-  /// Parses a boolean scalar.
-  YamlScalar _parseBool(ScalarEvent scalar) {
-    var match = new RegExp(r"^(?:(true|True|TRUE)|(false|False|FALSE))$").
-        firstMatch(scalar.value);
-    if (match == null) return null;
-    return new YamlScalar.internal(
-        match.group(1) != null, scalar.span, scalar.style);
-  }
-
-  /// Parses an integer scalar.
-  YamlScalar _parseInt(ScalarEvent scalar) {
-    var match = new RegExp(r"^[-+]?[0-9]+$").firstMatch(scalar.value);
-    if (match != null) {
-      return new YamlScalar.internal(
-          int.parse(match.group(0)), scalar.span, scalar.style);
-    }
-
-    match = new RegExp(r"^0o([0-7]+)$").firstMatch(scalar.value);
-    if (match != null) {
-      var n = int.parse(match.group(1), radix: 8);
-      return new YamlScalar.internal(n, scalar.span, scalar.style);
-    }
-
-    match = new RegExp(r"^0x[0-9a-fA-F]+$").firstMatch(scalar.value);
-    if (match != null) {
-      return new YamlScalar.internal(
-          int.parse(match.group(0)), scalar.span, scalar.style);
-    }
-
-    return null;
-  }
-
-  /// Parses a floating-point scalar.
-  YamlScalar _parseFloat(ScalarEvent scalar) {
-    var match = new RegExp(
-          r"^[-+]?(\.[0-9]+|[0-9]+(\.[0-9]*)?)([eE][-+]?[0-9]+)?$").
-        firstMatch(scalar.value);
-    if (match != null) {
-      // YAML allows floats of the form "0.", but Dart does not. Fix up those
-      // floats by removing the trailing dot.
-      var matchStr = match.group(0).replaceAll(new RegExp(r"\.$"), "");
-      return new YamlScalar.internal(
-          double.parse(matchStr), scalar.span, scalar.style);
-    }
-
-    match = new RegExp(r"^([+-]?)\.(inf|Inf|INF)$").firstMatch(scalar.value);
-    if (match != null) {
-      var value = match.group(1) == "-" ? -double.INFINITY : double.INFINITY;
-      return new YamlScalar.internal(value, scalar.span, scalar.style);
-    }
-
-    match = new RegExp(r"^\.(nan|NaN|NAN)$").firstMatch(scalar.value);
-    if (match != null) {
-      return new YamlScalar.internal(double.NAN, scalar.span, scalar.style);
-    }
-
-    return null;
-  }
-
-  /// Parses a string scalar.
-  YamlScalar _parseString(ScalarEvent scalar) =>
-      new YamlScalar.internal(scalar.value, scalar.span, scalar.style);
-}