Initial commit from sysy-main

antlr/antlr4-runtime-4.13.2/runtime/src/misc/InterpreterDataReader.cpp

@@ -0,0 +1,124 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "atn/ATN.h"
+#include "atn/ATNDeserializer.h"
+#include "Vocabulary.h"
+
+#include "misc/InterpreterDataReader.h"
+
+using namespace antlr4::dfa;
+using namespace antlr4::atn;
+using namespace antlr4::misc;
+
+InterpreterData::InterpreterData(std::vector<std::string> const& literalNames, std::vector<std::string> const& symbolicNames)
+: vocabulary(literalNames, symbolicNames) {
+}
+
+InterpreterData InterpreterDataReader::parseFile(std::string const& fileName) {
+  // The structure of the data file is very simple. Everything is line based with empty lines
+  // separating the different parts. For lexers the layout is:
+  // token literal names:
+  // ...
+  //
+  // token symbolic names:
+  // ...
+  //
+  // rule names:
+  // ...
+  //
+  // channel names:
+  // ...
+  //
+  // mode names:
+  // ...
+  //
+  // atn:
+  // <a single line with comma separated int values> enclosed in a pair of squared brackets.
+  //
+  // Data for a parser does not contain channel and mode names.
+
+  std::ifstream input(fileName);
+  if (!input.good())
+    return {};
+
+  std::vector<std::string> literalNames;
+  std::vector<std::string> symbolicNames;
+
+  std::string line;
+
+  std::getline(input, line, '\n');
+  assert(line == "token literal names:");
+  while (true) {
+    std::getline(input, line, '\n');
+    if (line.empty())
+      break;
+
+    literalNames.push_back(line == "null" ? "" : line);
+  };
+
+  std::getline(input, line, '\n');
+  assert(line == "token symbolic names:");
+  while (true) {
+    std::getline(input, line, '\n');
+    if (line.empty())
+      break;
+
+    symbolicNames.push_back(line == "null" ? "" : line);
+  };
+  InterpreterData result(literalNames, symbolicNames);
+
+  std::getline(input, line, '\n');
+  assert(line == "rule names:");
+  while (true) {
+    std::getline(input, line, '\n');
+    if (line.empty())
+      break;
+
+    result.ruleNames.push_back(line);
+  };
+
+  std::getline(input, line, '\n');
+  if (line == "channel names:") {
+    while (true) {
+      std::getline(input, line, '\n');
+      if (line.empty())
+        break;
+
+      result.channels.push_back(line);
+    };
+
+    std::getline(input, line, '\n');
+    assert(line == "mode names:");
+    while (true) {
+      std::getline(input, line, '\n');
+      if (line.empty())
+        break;
+
+      result.modes.push_back(line);
+    };
+  }
+
+  std::vector<int32_t> serializedATN;
+
+  std::getline(input, line, '\n');
+  assert(line == "atn:");
+  std::getline(input, line, '\n');
+  std::stringstream tokenizer(line);
+  std::string value;
+  while (tokenizer.good()) {
+    std::getline(tokenizer, value, ',');
+    unsigned long number;
+    if (value[0] == '[')
+      number = std::strtoul(&value[1], nullptr, 10);
+    else
+      number = std::strtoul(value.c_str(), nullptr, 10);
+    serializedATN.push_back(static_cast<int32_t>(number));
+  }
+
+  ATNDeserializer deserializer;
+  result.atn = deserializer.deserialize(serializedATN);
+  return result;
+}

antlr/antlr4-runtime-4.13.2/runtime/src/misc/InterpreterDataReader.h

@@ -0,0 +1,33 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include "antlr4-common.h"
+#include "atn/ATN.h"
+#include "Vocabulary.h"
+
+namespace antlr4 {
+namespace misc {
+
+  struct InterpreterData {
+    std::unique_ptr<atn::ATN> atn;
+    dfa::Vocabulary vocabulary;
+    std::vector<std::string> ruleNames;
+    std::vector<std::string> channels; // Only valid for lexer grammars.
+    std::vector<std::string> modes; // ditto
+
+    InterpreterData() {}; // For invalid content.
+    InterpreterData(std::vector<std::string> const& literalNames, std::vector<std::string> const& symbolicNames);
+  };
+
+  // A class to read plain text interpreter data produced by ANTLR.
+  class ANTLR4CPP_PUBLIC InterpreterDataReader {
+  public:
+    static InterpreterData parseFile(std::string const& fileName);
+  };
+
+} // namespace atn
+} // namespace antlr4

antlr/antlr4-runtime-4.13.2/runtime/src/misc/Interval.cpp

@@ -0,0 +1,61 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "misc/Interval.h"
+
+using namespace antlr4::misc;
+
+const Interval Interval::INVALID;
+
+size_t Interval::hashCode() const {
+  size_t hash = 23;
+  hash = hash * 31 + static_cast<size_t>(a);
+  hash = hash * 31 + static_cast<size_t>(b);
+  return hash;
+}
+
+bool Interval::startsBeforeDisjoint(const Interval &other) const {
+  return a < other.a && b < other.a;
+}
+
+bool Interval::startsBeforeNonDisjoint(const Interval &other) const {
+  return a <= other.a && b >= other.a;
+}
+
+bool Interval::startsAfter(const Interval &other) const {
+  return a > other.a;
+}
+
+bool Interval::startsAfterDisjoint(const Interval &other) const {
+  return a > other.b;
+}
+
+bool Interval::startsAfterNonDisjoint(const Interval &other) const {
+  return a > other.a && a <= other.b; // b >= other.b implied
+}
+
+bool Interval::disjoint(const Interval &other) const {
+  return startsBeforeDisjoint(other) || startsAfterDisjoint(other);
+}
+
+bool Interval::adjacent(const Interval &other) const {
+  return a == other.b + 1 || b == other.a - 1;
+}
+
+bool Interval::properlyContains(const Interval &other) const {
+  return other.a >= a && other.b <= b;
+}
+
+Interval Interval::Union(const Interval &other) const {
+  return Interval(std::min(a, other.a), std::max(b, other.b));
+}
+
+Interval Interval::intersection(const Interval &other) const {
+  return Interval(std::max(a, other.a), std::min(b, other.b));
+}
+
+std::string Interval::toString() const {
+  return std::to_string(a) + ".." + std::to_string(b);
+}

antlr/antlr4-runtime-4.13.2/runtime/src/misc/Interval.h

@@ -0,0 +1,84 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include "antlr4-common.h"
+
+namespace antlr4 {
+namespace misc {
+
+  // Helpers to convert certain unsigned symbols (e.g. Token::EOF) to their original numeric value (e.g. -1)
+  // and vice versa. This is needed mostly for intervals to keep their original order and for toString()
+  // methods to print the original numeric value (e.g. for tests).
+  constexpr size_t numericToSymbol(ssize_t v) { return static_cast<size_t>(v); }
+  constexpr ssize_t symbolToNumeric(size_t v) { return static_cast<ssize_t>(v); }
+
+  /// An immutable inclusive interval a..b
+  class ANTLR4CPP_PUBLIC Interval final {
+  public:
+    static const Interval INVALID;
+
+    // Must stay signed to guarantee the correct sort order.
+    ssize_t a;
+    ssize_t b;
+
+    constexpr Interval() : Interval(static_cast<ssize_t>(-1), static_cast<ssize_t>(-2)) {}
+
+    constexpr explicit Interval(size_t a_, size_t b_) : Interval(symbolToNumeric(a_), symbolToNumeric(b_)) {}
+
+    constexpr Interval(ssize_t a_, ssize_t b_) : a(a_), b(b_) {}
+
+    /// return number of elements between a and b inclusively. x..x is length 1.
+    ///  if b < a, then length is 0.  9..10 has length 2.
+    constexpr size_t length() const { return b >= a ? static_cast<size_t>(b - a + 1) : 0; }
+
+    constexpr bool operator==(const Interval &other) const { return a == other.a && b == other.b; }
+
+    size_t hashCode() const;
+
+    /// <summary>
+    /// Does this start completely before other? Disjoint </summary>
+    bool startsBeforeDisjoint(const Interval &other) const;
+
+    /// <summary>
+    /// Does this start at or before other? Nondisjoint </summary>
+    bool startsBeforeNonDisjoint(const Interval &other) const;
+
+    /// <summary>
+    /// Does this.a start after other.b? May or may not be disjoint </summary>
+    bool startsAfter(const Interval &other) const;
+
+    /// <summary>
+    /// Does this start completely after other? Disjoint </summary>
+    bool startsAfterDisjoint(const Interval &other) const;
+
+    /// <summary>
+    /// Does this start after other? NonDisjoint </summary>
+    bool startsAfterNonDisjoint(const Interval &other) const;
+
+    /// <summary>
+    /// Are both ranges disjoint? I.e., no overlap? </summary>
+    bool disjoint(const Interval &other) const;
+
+    /// <summary>
+    /// Are two intervals adjacent such as 0..41 and 42..42? </summary>
+    bool adjacent(const Interval &other) const;
+
+    bool properlyContains(const Interval &other) const;
+
+    /// <summary>
+    /// Return the interval computed from combining this and other </summary>
+    Interval Union(const Interval &other) const;
+
+    /// <summary>
+    /// Return the interval in common between this and o </summary>
+    Interval intersection(const Interval &other) const;
+
+    std::string toString() const;
+  };
+
+} // namespace atn
+} // namespace antlr4

antlr/antlr4-runtime-4.13.2/runtime/src/misc/IntervalSet.cpp

@@ -0,0 +1,508 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "misc/MurmurHash.h"
+#include "Lexer.h"
+#include "Exceptions.h"
+#include "Vocabulary.h"
+
+#include "misc/IntervalSet.h"
+
+using namespace antlr4;
+using namespace antlr4::misc;
+
+IntervalSet const IntervalSet::COMPLETE_CHAR_SET =
+    IntervalSet::of(Lexer::MIN_CHAR_VALUE, Lexer::MAX_CHAR_VALUE);
+
+IntervalSet const IntervalSet::EMPTY_SET;
+
+IntervalSet::IntervalSet() : _intervals() {
+}
+
+IntervalSet::IntervalSet(const IntervalSet &set) : IntervalSet() {
+  _intervals = set._intervals;
+}
+
+IntervalSet::IntervalSet(IntervalSet&& set) : IntervalSet(std::move(set._intervals)) {
+}
+
+IntervalSet::IntervalSet(std::vector<Interval>&& intervals) : _intervals(std::move(intervals)) {
+}
+
+IntervalSet& IntervalSet::operator=(const IntervalSet& other) {
+  _intervals = other._intervals;
+  return *this;
+}
+
+IntervalSet& IntervalSet::operator=(IntervalSet&& other) {
+  _intervals = std::move(other._intervals);
+  return *this;
+}
+
+IntervalSet IntervalSet::of(ssize_t a) {
+  return IntervalSet({ Interval(a, a) });
+}
+
+IntervalSet IntervalSet::of(ssize_t a, ssize_t b) {
+  return IntervalSet({ Interval(a, b) });
+}
+
+void IntervalSet::clear() {
+  _intervals.clear();
+}
+
+void IntervalSet::add(ssize_t el) {
+  add(el, el);
+}
+
+void IntervalSet::add(ssize_t a, ssize_t b) {
+  add(Interval(a, b));
+}
+
+void IntervalSet::add(const Interval &addition) {
+  if (addition.b < addition.a) {
+    return;
+  }
+
+  // find position in list
+  for (auto iterator = _intervals.begin(); iterator != _intervals.end(); ++iterator) {
+    Interval r = *iterator;
+    if (addition == r) {
+      return;
+    }
+
+    if (addition.adjacent(r) || !addition.disjoint(r)) {
+      // next to each other, make a single larger interval
+      Interval bigger = addition.Union(r);
+      *iterator = bigger;
+
+      // make sure we didn't just create an interval that
+      // should be merged with next interval in list
+      while (iterator + 1 != _intervals.end()) {
+        Interval next = *++iterator;
+        if (!bigger.adjacent(next) && bigger.disjoint(next)) {
+          break;
+        }
+
+        // if we bump up against or overlap next, merge
+        iterator = _intervals.erase(iterator);// remove this one
+        --iterator; // move backwards to what we just set
+        *iterator = bigger.Union(next); // set to 3 merged ones
+        // ml: no need to advance iterator, we do that in the next round anyway. ++iterator; // first call to next after previous duplicates the result
+      }
+      return;
+    }
+
+    if (addition.startsBeforeDisjoint(r)) {
+      // insert before r
+      //--iterator;
+      _intervals.insert(iterator, addition);
+      return;
+    }
+
+    // if disjoint and after r, a future iteration will handle it
+  }
+
+  // ok, must be after last interval (and disjoint from last interval)
+  // just add it
+  _intervals.push_back(addition);
+}
+
+IntervalSet IntervalSet::Or(const std::vector<IntervalSet> &sets) {
+  IntervalSet result;
+  for (const auto &s : sets) {
+    result.addAll(s);
+  }
+  return result;
+}
+
+IntervalSet& IntervalSet::addAll(const IntervalSet &set) {
+  // walk set and add each interval
+  for (auto const& interval : set._intervals) {
+    add(interval);
+  }
+  return *this;
+}
+
+IntervalSet IntervalSet::complement(ssize_t minElement, ssize_t maxElement) const {
+  return complement(IntervalSet::of(minElement, maxElement));
+}
+
+IntervalSet IntervalSet::complement(const IntervalSet &vocabulary) const {
+  return vocabulary.subtract(*this);
+}
+
+IntervalSet IntervalSet::subtract(const IntervalSet &other) const {
+  return subtract(*this, other);
+}
+
+IntervalSet IntervalSet::subtract(const IntervalSet &left, const IntervalSet &right) {
+  if (left.isEmpty()) {
+    return IntervalSet();
+  }
+
+  if (right.isEmpty()) {
+    // right set has no elements; just return the copy of the current set
+    return left;
+  }
+
+  IntervalSet result(left);
+  size_t resultI = 0;
+  size_t rightI = 0;
+  while (resultI < result._intervals.size() && rightI < right._intervals.size()) {
+    Interval &resultInterval = result._intervals[resultI];
+    const Interval &rightInterval = right._intervals[rightI];
+
+    // operation: (resultInterval - rightInterval) and update indexes
+
+    if (rightInterval.b < resultInterval.a) {
+      rightI++;
+      continue;
+    }
+
+    if (rightInterval.a > resultInterval.b) {
+      resultI++;
+      continue;
+    }
+
+    Interval beforeCurrent;
+    Interval afterCurrent;
+    if (rightInterval.a > resultInterval.a) {
+      beforeCurrent = Interval(resultInterval.a, rightInterval.a - 1);
+    }
+
+    if (rightInterval.b < resultInterval.b) {
+      afterCurrent = Interval(rightInterval.b + 1, resultInterval.b);
+    }
+
+    if (beforeCurrent.a > -1) { // -1 is the default value
+      if (afterCurrent.a > -1) {
+        // split the current interval into two
+        result._intervals[resultI] = beforeCurrent;
+        result._intervals.insert(result._intervals.begin() + resultI + 1, afterCurrent);
+        resultI++;
+        rightI++;
+      } else {
+        // replace the current interval
+        result._intervals[resultI] = beforeCurrent;
+        resultI++;
+      }
+    } else {
+      if (afterCurrent.a > -1) {
+        // replace the current interval
+        result._intervals[resultI] = afterCurrent;
+        rightI++;
+      } else {
+        // remove the current interval (thus no need to increment resultI)
+        result._intervals.erase(result._intervals.begin() + resultI);
+      }
+    }
+  }
+
+  // If rightI reached right.intervals.size(), no more intervals to subtract from result.
+  // If resultI reached result.intervals.size(), we would be subtracting from an empty set.
+  // Either way, we are done.
+  return result;
+}
+
+IntervalSet IntervalSet::Or(const IntervalSet &a) const {
+  IntervalSet result;
+  result.addAll(*this);
+  result.addAll(a);
+  return result;
+}
+
+IntervalSet IntervalSet::And(const IntervalSet &other) const {
+  IntervalSet intersection;
+  size_t i = 0;
+  size_t j = 0;
+
+  // iterate down both interval lists looking for nondisjoint intervals
+  while (i < _intervals.size() && j < other._intervals.size()) {
+    Interval mine = _intervals[i];
+    Interval theirs = other._intervals[j];
+
+    if (mine.startsBeforeDisjoint(theirs)) {
+      // move this iterator looking for interval that might overlap
+      i++;
+    } else if (theirs.startsBeforeDisjoint(mine)) {
+      // move other iterator looking for interval that might overlap
+      j++;
+    } else if (mine.properlyContains(theirs)) {
+      // overlap, add intersection, get next theirs
+      intersection.add(mine.intersection(theirs));
+      j++;
+    } else if (theirs.properlyContains(mine)) {
+      // overlap, add intersection, get next mine
+      intersection.add(mine.intersection(theirs));
+      i++;
+    } else if (!mine.disjoint(theirs)) {
+      // overlap, add intersection
+      intersection.add(mine.intersection(theirs));
+
+      // Move the iterator of lower range [a..b], but not
+      // the upper range as it may contain elements that will collide
+      // with the next iterator. So, if mine=[0..115] and
+      // theirs=[115..200], then intersection is 115 and move mine
+      // but not theirs as theirs may collide with the next range
+      // in thisIter.
+      // move both iterators to next ranges
+      if (mine.startsAfterNonDisjoint(theirs)) {
+        j++;
+      } else if (theirs.startsAfterNonDisjoint(mine)) {
+        i++;
+      }
+    }
+  }
+
+  return intersection;
+}
+
+bool IntervalSet::contains(size_t el) const {
+  return contains(symbolToNumeric(el));
+}
+
+bool IntervalSet::contains(ssize_t el) const {
+  if (_intervals.empty() || el < _intervals.front().a || el > _intervals.back().b) {
+    return false;
+  }
+
+  return std::binary_search(_intervals.begin(), _intervals.end(), Interval(el, el), [](const Interval &lhs, const Interval &rhs) {
+    return lhs.b < rhs.a;
+  });
+}
+
+bool IntervalSet::isEmpty() const {
+  return _intervals.empty();
+}
+
+ssize_t IntervalSet::getSingleElement() const {
+  if (_intervals.size() == 1) {
+    if (_intervals[0].a == _intervals[0].b) {
+      return _intervals[0].a;
+    }
+  }
+
+  return Token::INVALID_TYPE; // XXX: this value is 0, but 0 is a valid interval range, how can that work?
+}
+
+ssize_t IntervalSet::getMaxElement() const {
+  if (_intervals.empty()) {
+    return Token::INVALID_TYPE;
+  }
+
+  return _intervals.back().b;
+}
+
+ssize_t IntervalSet::getMinElement() const {
+  if (_intervals.empty()) {
+    return Token::INVALID_TYPE;
+  }
+
+  return _intervals.front().a;
+}
+
+std::vector<Interval> const& IntervalSet::getIntervals() const {
+  return _intervals;
+}
+
+size_t IntervalSet::hashCode() const {
+  size_t hash = MurmurHash::initialize();
+  for (const auto &interval : _intervals) {
+    hash = MurmurHash::update(hash, interval.a);
+    hash = MurmurHash::update(hash, interval.b);
+  }
+
+  return MurmurHash::finish(hash, _intervals.size() * 2);
+}
+
+bool IntervalSet::operator == (const IntervalSet &other) const {
+  if (_intervals.empty() && other._intervals.empty())
+    return true;
+
+  if (_intervals.size() != other._intervals.size())
+    return false;
+
+  return std::equal(_intervals.begin(), _intervals.end(), other._intervals.begin());
+}
+
+std::string IntervalSet::toString() const {
+  return toString(false);
+}
+
+std::string IntervalSet::toString(bool elemAreChar) const {
+  if (_intervals.empty()) {
+    return "{}";
+  }
+
+  std::stringstream ss;
+  size_t effectiveSize = size();
+  if (effectiveSize > 1) {
+    ss << "{";
+  }
+
+  bool firstEntry = true;
+  for (const auto &interval : _intervals) {
+    if (!firstEntry)
+      ss << ", ";
+    firstEntry = false;
+
+    ssize_t a = interval.a;
+    ssize_t b = interval.b;
+    if (a == b) {
+      if (a == -1) {
+        ss << "<EOF>";
+      } else if (elemAreChar) {
+        ss << "'" << static_cast<char>(a) << "'";
+      } else {
+        ss << a;
+      }
+    } else {
+      if (elemAreChar) {
+        ss << "'" << static_cast<char>(a) << "'..'" << static_cast<char>(b) << "'";
+      } else {
+        ss << a << ".." << b;
+      }
+    }
+  }
+  if (effectiveSize > 1) {
+    ss << "}";
+  }
+
+  return ss.str();
+}
+
+std::string IntervalSet::toString(const dfa::Vocabulary &vocabulary) const {
+  if (_intervals.empty()) {
+    return "{}";
+  }
+
+  std::stringstream ss;
+  size_t effectiveSize = size();
+  if (effectiveSize > 1) {
+    ss << "{";
+  }
+
+  bool firstEntry = true;
+  for (const auto &interval : _intervals) {
+    if (!firstEntry)
+      ss << ", ";
+    firstEntry = false;
+
+    ssize_t a = interval.a;
+    ssize_t b = interval.b;
+    if (a == b) {
+      ss << elementName(vocabulary, a);
+    } else {
+      for (ssize_t i = a; i <= b; i++) {
+        if (i > a) {
+          ss << ", ";
+        }
+        ss << elementName(vocabulary, i);
+      }
+    }
+  }
+  if (effectiveSize > 1) {
+    ss << "}";
+  }
+
+  return ss.str();
+}
+
+std::string IntervalSet::elementName(const dfa::Vocabulary &vocabulary, ssize_t a) const {
+  if (a == -1) {
+    return "<EOF>";
+  } else if (a == -2) {
+    return "<EPSILON>";
+  } else {
+    return vocabulary.getDisplayName(a);
+  }
+}
+
+size_t IntervalSet::size() const {
+  size_t result = 0;
+  for (const auto &interval : _intervals) {
+    result += size_t(interval.b - interval.a + 1);
+  }
+  return result;
+}
+
+std::vector<ssize_t> IntervalSet::toList() const {
+  std::vector<ssize_t> result;
+  for (const auto &interval : _intervals) {
+    ssize_t a = interval.a;
+    ssize_t b = interval.b;
+    for (ssize_t v = a; v <= b; v++) {
+      result.push_back(v);
+    }
+  }
+  return result;
+}
+
+std::set<ssize_t> IntervalSet::toSet() const {
+  std::set<ssize_t> result;
+  for (const auto &interval : _intervals) {
+    ssize_t a = interval.a;
+    ssize_t b = interval.b;
+    for (ssize_t v = a; v <= b; v++) {
+      result.insert(v);
+    }
+  }
+  return result;
+}
+
+ssize_t IntervalSet::get(size_t i) const {
+  size_t index = 0;
+  for (const auto &interval : _intervals) {
+    ssize_t a = interval.a;
+    ssize_t b = interval.b;
+    for (ssize_t v = a; v <= b; v++) {
+      if (index == i) {
+        return v;
+      }
+      index++;
+    }
+  }
+  return -1;
+}
+
+void IntervalSet::remove(size_t el) {
+  remove(symbolToNumeric(el));
+}
+
+void IntervalSet::remove(ssize_t el) {
+  for (size_t i = 0; i < _intervals.size(); ++i) {
+    Interval &interval = _intervals[i];
+    ssize_t a = interval.a;
+    ssize_t b = interval.b;
+    if (el < a) {
+      break; // list is sorted and el is before this interval; not here
+    }
+
+    // if whole interval x..x, rm
+    if (el == a && el == b) {
+      _intervals.erase(_intervals.begin() + (long)i);
+      break;
+    }
+    // if on left edge x..b, adjust left
+    if (el == a) {
+      interval.a++;
+      break;
+    }
+    // if on right edge a..x, adjust right
+    if (el == b) {
+      interval.b--;
+      break;
+    }
+    // if in middle a..x..b, split interval
+    if (el > a && el < b) { // found in this interval
+      ssize_t oldb = interval.b;
+      interval.b = el - 1; // [a..x-1]
+      add(el + 1, oldb); // add [x+1..b]
+
+      break; // ml: not in the Java code but I believe we also should stop searching here, as we found x.
+    }
+  }
+}

antlr/antlr4-runtime-4.13.2/runtime/src/misc/IntervalSet.h

@@ -0,0 +1,190 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include "misc/Interval.h"
+#include "Exceptions.h"
+
+namespace antlr4 {
+namespace misc {
+
+  /**
+   * This class implements the {@link IntSet} backed by a sorted array of
+   * non-overlapping intervals. It is particularly efficient for representing
+   * large collections of numbers, where the majority of elements appear as part
+   * of a sequential range of numbers that are all part of the set. For example,
+   * the set { 1, 2, 3, 4, 7, 8 } may be represented as { [1, 4], [7, 8] }.
+   *
+   * <p>
+   * This class is able to represent sets containing any combination of values in
+   * the range {@link Integer#MIN_VALUE} to {@link Integer#MAX_VALUE}
+   * (inclusive).</p>
+   */
+  class ANTLR4CPP_PUBLIC IntervalSet final {
+  public:
+    static IntervalSet const COMPLETE_CHAR_SET;
+    static IntervalSet const EMPTY_SET;
+
+  private:
+    /// The list of sorted, disjoint intervals.
+    std::vector<Interval> _intervals;
+
+    explicit IntervalSet(std::vector<Interval>&& intervals);
+
+  public:
+    IntervalSet();
+    IntervalSet(IntervalSet const& set);
+    IntervalSet(IntervalSet&& set);
+
+    template<typename T1, typename... T_NEXT>
+    IntervalSet(int, T1 t1, T_NEXT&&... next) : IntervalSet() {
+      // The first int argument is an ignored count for compatibility
+      // with the previous varargs based interface.
+      addItems(t1, std::forward<T_NEXT>(next)...);
+    }
+
+    IntervalSet& operator=(IntervalSet const& set);
+    IntervalSet& operator=(IntervalSet&& set);
+
+    /// Create a set with a single element, el.
+    static IntervalSet of(ssize_t a);
+
+    /// Create a set with all ints within range [a..b] (inclusive)
+    static IntervalSet of(ssize_t a, ssize_t b);
+
+    void clear();
+
+    /// Add a single element to the set.  An isolated element is stored
+    /// as a range el..el.
+    void add(ssize_t el);
+
+    /// Add interval; i.e., add all integers from a to b to set.
+    /// If b<a, do nothing.
+    /// Keep list in sorted order (by left range value).
+    /// If overlap, combine ranges.  For example,
+    /// If this is {1..5, 10..20}, adding 6..7 yields
+    /// {1..5, 6..7, 10..20}.  Adding 4..8 yields {1..8, 10..20}.
+    void add(ssize_t a, ssize_t b);
+
+    /// combine all sets in the array returned the or'd value
+    static IntervalSet Or(const std::vector<IntervalSet> &sets);
+
+    // Copy on write so we can cache a..a intervals and sets of that.
+    void add(const Interval &addition);
+    IntervalSet& addAll(const IntervalSet &set);
+
+    template<typename T1, typename... T_NEXT>
+    void addItems(T1 t1, T_NEXT&&... next) {
+      add(t1);
+      addItems(std::forward<T_NEXT>(next)...);
+    }
+
+    IntervalSet complement(ssize_t minElement, ssize_t maxElement) const;
+
+    /// Given the set of possible values (rather than, say UNICODE or MAXINT),
+    /// return a new set containing all elements in vocabulary, but not in
+    /// this.  The computation is (vocabulary - this).
+    ///
+    /// 'this' is assumed to be either a subset or equal to vocabulary.
+    IntervalSet complement(const IntervalSet &vocabulary) const;
+
+    /// Compute this-other via this&~other.
+    /// Return a new set containing all elements in this but not in other.
+    /// other is assumed to be a subset of this;
+    /// anything that is in other but not in this will be ignored.
+    IntervalSet subtract(const IntervalSet &other) const;
+
+    /**
+     * Compute the set difference between two interval sets. The specific
+     * operation is {@code left - right}. If either of the input sets is
+     * {@code null}, it is treated as though it was an empty set.
+     */
+    static IntervalSet subtract(const IntervalSet &left, const IntervalSet &right);
+
+    IntervalSet Or(const IntervalSet &a) const;
+
+    /// Return a new set with the intersection of this set with other.  Because
+    /// the intervals are sorted, we can use an iterator for each list and
+    /// just walk them together.  This is roughly O(min(n,m)) for interval
+    /// list lengths n and m.
+    IntervalSet And(const IntervalSet &other) const;
+
+    /// Is el in any range of this set?
+    bool contains(size_t el) const; // For mapping of e.g. Token::EOF to -1 etc.
+    bool contains(ssize_t el) const;
+
+    /// return true if this set has no members
+    bool isEmpty() const;
+
+    /// If this set is a single integer, return it otherwise Token.INVALID_TYPE.
+    ssize_t getSingleElement() const;
+
+    /**
+     * Returns the maximum value contained in the set.
+     *
+     * @return the maximum value contained in the set. If the set is empty, this
+     * method returns {@link Token#INVALID_TYPE}.
+     */
+    ssize_t getMaxElement() const;
+
+    /**
+     * Returns the minimum value contained in the set.
+     *
+     * @return the minimum value contained in the set. If the set is empty, this
+     * method returns {@link Token#INVALID_TYPE}.
+     */
+    ssize_t getMinElement() const;
+
+    /// <summary>
+    /// Return a list of Interval objects. </summary>
+    std::vector<Interval> const& getIntervals() const;
+
+    size_t hashCode() const;
+
+    /// Are two IntervalSets equal?  Because all intervals are sorted
+    ///  and disjoint, equals is a simple linear walk over both lists
+    ///  to make sure they are the same.
+    bool operator == (const IntervalSet &other) const;
+    std::string toString() const;
+    std::string toString(bool elemAreChar) const;
+
+    std::string toString(const dfa::Vocabulary &vocabulary) const;
+
+  protected:
+    std::string elementName(const dfa::Vocabulary &vocabulary, ssize_t a) const;
+
+  public:
+    size_t size() const;
+    std::vector<ssize_t> toList() const;
+    std::set<ssize_t> toSet() const;
+
+    /// Get the ith element of ordered set.  Used only by RandomPhrase so
+    /// don't bother to implement if you're not doing that for a new
+    /// ANTLR code gen target.
+    ssize_t get(size_t i) const;
+    void remove(size_t el); // For mapping of e.g. Token::EOF to -1 etc.
+    void remove(ssize_t el);
+
+  private:
+    void addItems() { /* No-op */ }
+  };
+
+} // namespace atn
+} // namespace antlr4
+
+// Hash function for IntervalSet.
+
+namespace std {
+  using antlr4::misc::IntervalSet;
+
+  template <> struct hash<IntervalSet>
+  {
+    size_t operator() (const IntervalSet &x) const
+    {
+      return x.hashCode();
+    }
+  };
+}

antlr/antlr4-runtime-4.13.2/runtime/src/misc/MurmurHash.cpp

@@ -0,0 +1,120 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+
+#include "misc/MurmurHash.h"
+
+using namespace antlr4::misc;
+
+// A variation of the MurmurHash3 implementation (https://github.com/aappleby/smhasher/blob/master/src/MurmurHash3.cpp)
+// Here we unrolled the loop used there into individual calls to update(), as we usually hash object fields
+// instead of entire buffers.
+
+// Platform-specific functions and macros
+
+// Microsoft Visual Studio
+
+#if defined(_MSC_VER)
+
+#include <stdlib.h>
+
+#define ROTL32(x,y)	_rotl(x,y)
+#define ROTL64(x,y)	_rotl64(x,y)
+
+#elif ANTLR4CPP_HAVE_BUILTIN(__builtin_rotateleft32) && ANTLR4CPP_HAVE_BUILTIN(__builtin_rotateleft64)
+
+#define ROTL32(x, y) __builtin_rotateleft32(x, y)
+#define ROTL64(x, y) __builtin_rotateleft64(x, y)
+
+#else	// defined(_MSC_VER)
+
+// Other compilers
+
+namespace {
+
+constexpr uint32_t ROTL32(uint32_t x, int r) {
+  return (x << r) | (x >> (32 - r));
+}
+constexpr uint64_t ROTL64(uint64_t x, int r) {
+  return (x << r) | (x >> (64 - r));
+}
+
+}
+
+#endif // !defined(_MSC_VER)
+
+#if SIZE_MAX == UINT64_MAX
+
+size_t MurmurHash::update(size_t hash, size_t value) {
+  size_t k1 = value;
+  k1 *= UINT64_C(0x87c37b91114253d5);
+  k1 = ROTL64(k1, 31);
+  k1 *= UINT64_C(0x4cf5ad432745937f);
+
+  hash ^= k1;
+  hash = ROTL64(hash, 27);
+  hash = hash * 5 + UINT64_C(0x52dce729);
+
+  return hash;
+}
+
+size_t MurmurHash::finish(size_t hash, size_t entryCount) {
+  hash ^= entryCount * 8;
+  hash ^= hash >> 33;
+  hash *= UINT64_C(0xff51afd7ed558ccd);
+  hash ^= hash >> 33;
+  hash *= UINT64_C(0xc4ceb9fe1a85ec53);
+  hash ^= hash >> 33;
+  return hash;
+}
+
+#elif SIZE_MAX == UINT32_MAX
+
+size_t MurmurHash::update(size_t hash, size_t value) {
+  size_t k1 = value;
+  k1 *= UINT32_C(0xCC9E2D51);
+  k1 = ROTL32(k1, 15);
+  k1 *= UINT32_C(0x1B873593);
+
+  hash ^= k1;
+  hash = ROTL32(hash, 13);
+  hash = hash * 5 + UINT32_C(0xE6546B64);
+
+  return hash;
+}
+
+size_t MurmurHash::finish(size_t hash, size_t entryCount) {
+  hash ^= entryCount * 4;
+  hash ^= hash >> 16;
+  hash *= UINT32_C(0x85EBCA6B);
+  hash ^= hash >> 13;
+  hash *= UINT32_C(0xC2B2AE35);
+  hash ^= hash >> 16;
+  return hash;
+}
+
+#else
+#error "Expected sizeof(size_t) to be 4 or 8."
+#endif
+
+size_t MurmurHash::update(size_t hash, const void *data, size_t size) {
+  size_t value;
+  const uint8_t *bytes = static_cast<const uint8_t*>(data);
+  while (size >= sizeof(size_t)) {
+    std::memcpy(&value, bytes, sizeof(size_t));
+    hash = update(hash, value);
+    bytes += sizeof(size_t);
+    size -= sizeof(size_t);
+  }
+  if (size != 0) {
+    value = 0;
+    std::memcpy(&value, bytes, size);
+    hash = update(hash, value);
+  }
+  return hash;
+}

antlr/antlr4-runtime-4.13.2/runtime/src/misc/MurmurHash.h

@@ -0,0 +1,102 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <type_traits>
+
+#include "antlr4-common.h"
+
+namespace antlr4 {
+namespace misc {
+
+  class ANTLR4CPP_PUBLIC MurmurHash final {
+  private:
+    static constexpr size_t DEFAULT_SEED = 0;
+
+    /// Initialize the hash using the default seed value.
+    /// Returns the intermediate hash value.
+  public:
+    static size_t initialize() { return initialize(DEFAULT_SEED); }
+
+    /// Initialize the hash using the specified seed.
+    static size_t initialize(size_t seed) { return seed; }
+
+    /// Update the intermediate hash value for the next input {@code value}.
+    /// <param name="hash"> the intermediate hash value </param>
+    /// <param name="value"> the value to add to the current hash </param>
+    /// Returns the updated intermediate hash value.
+    static size_t update(size_t hash, size_t value);
+
+    /**
+     * Update the intermediate hash value for the next input {@code value}.
+     *
+     * @param hash the intermediate hash value
+     * @param value the value to add to the current hash
+     * @return the updated intermediate hash value
+     */
+    template <class T>
+    static size_t update(size_t hash, Ref<T> const& value) {
+      return update(hash, value != nullptr ? value->hashCode() : 0);
+    }
+
+    template <class T>
+    static size_t update(size_t hash, T *value) {
+      return update(hash, value != nullptr ? value->hashCode() : 0);
+    }
+
+    static size_t update(size_t hash, const void *data, size_t size);
+
+    template <typename T>
+    static size_t update(size_t hash, const T *data, size_t size) {
+      return update(hash, static_cast<const void*>(data), size * sizeof(std::remove_reference_t<T>));
+    }
+
+    /// <summary>
+    /// Apply the final computation steps to the intermediate value {@code hash}
+    /// to form the final result of the MurmurHash 3 hash function.
+    /// </summary>
+    /// <param name="hash"> the intermediate hash value </param>
+    /// <param name="entryCount"> the number of calls to update() before calling finish() </param>
+    /// <returns> the final hash result </returns>
+    static size_t finish(size_t hash, size_t entryCount);
+
+    /// Utility function to compute the hash code of an array using the MurmurHash3 algorithm.
+    ///
+    /// @param <T> the array element type </param>
+    /// <param name="data"> the array data </param>
+    /// <param name="seed"> the seed for the MurmurHash algorithm </param>
+    /// <returns> the hash code of the data </returns>
+    template<typename T> // where T is C array type
+    static size_t hashCode(const std::vector<Ref<T>> &data, size_t seed = DEFAULT_SEED) {
+      size_t hash = initialize(seed);
+      for (auto &entry : data) {
+        hash = update(hash, entry);
+      }
+      return finish(hash, data.size());
+    }
+
+    static size_t hashCode(const void *data, size_t size, size_t seed = DEFAULT_SEED) {
+      size_t hash = initialize(seed);
+      hash = update(hash, data, size);
+      return finish(hash, size);
+    }
+
+    template <typename T>
+    static size_t hashCode(const T *data, size_t size, size_t seed = DEFAULT_SEED) {
+      return hashCode(static_cast<const void*>(data), size * sizeof(std::remove_reference_t<T>), seed);
+    }
+
+  private:
+    MurmurHash() = delete;
+
+    MurmurHash(const MurmurHash&) = delete;
+
+    MurmurHash& operator=(const MurmurHash&) = delete;
+  };
+
+} // namespace atn
+} // namespace antlr4

antlr/antlr4-runtime-4.13.2/runtime/src/misc/Predicate.cpp

@@ -0,0 +1,4 @@
+#include "misc/Predicate.h"
+
+antlr4::misc::Predicate::~Predicate() {
+}

antlr/antlr4-runtime-4.13.2/runtime/src/misc/Predicate.h

@@ -0,0 +1,21 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include "antlr4-common.h"
+
+namespace antlr4 {
+namespace misc {
+
+  class ANTLR4CPP_PUBLIC Predicate {
+  public:
+    virtual ~Predicate();
+
+    virtual bool test(tree::ParseTree *t) = 0;
+  };
+
+} // namespace tree
+} // namespace antlr4