Initial commit from sysy-main

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);
+}