rangeUntil member operator in builtins #KT-52933

libraries/stdlib/js-ir-minimal-for-test/src/smallRuntimeRanges.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.ranges
+
+
+
+// extracted from _URanges.kt to avoid bringing a lot of transitive dependencies
+/**
+ * Returns a range from this value up to but excluding the specified [to] value.
+ *
+ * If the [to] value is less than or equal to `this` value, then the returned range is empty.
+ */
+public infix fun UByte.until(to: UByte): UIntRange {
+    if (to <= UByte.MIN_VALUE) return UIntRange.EMPTY
+    return this.toUInt() .. (to - 1u).toUInt()
+}
+
+/**
+ * Returns a range from this value up to but excluding the specified [to] value.
+ *
+ * If the [to] value is less than or equal to `this` value, then the returned range is empty.
+ */
+public infix fun UInt.until(to: UInt): UIntRange {
+    if (to <= UInt.MIN_VALUE) return UIntRange.EMPTY
+    return this .. (to - 1u).toUInt()
+}
+
+/**
+ * Returns a range from this value up to but excluding the specified [to] value.
+ *
+ * If the [to] value is less than or equal to `this` value, then the returned range is empty.
+ */
+public infix fun ULong.until(to: ULong): ULongRange {
+    if (to <= ULong.MIN_VALUE) return ULongRange.EMPTY
+    return this .. (to - 1u).toULong()
+}
+
+/**
+ * Returns a range from this value up to but excluding the specified [to] value.
+ *
+ * If the [to] value is less than or equal to `this` value, then the returned range is empty.
+ */
+public infix fun UShort.until(to: UShort): UIntRange {
+    if (to <= UShort.MIN_VALUE) return UIntRange.EMPTY
+    return this.toUInt() .. (to - 1u).toUInt()
+}