From d7252548fc1e58cc525d857b1e3d103b4721648d Mon Sep 17 00:00:00 2001
From: Ilya Gorbunov <ilya.gorbunov@jetbrains.com>
Date: Mon, 17 Jun 2019 21:10:39 +0300
Subject: [PATCH] Add symmetric number * duration operators

---
 libraries/stdlib/src/kotlin/time/Duration.kt | 15 +++++++++++++--
 libraries/stdlib/test/time/DurationTest.kt   |  4 ++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/libraries/stdlib/src/kotlin/time/Duration.kt b/libraries/stdlib/src/kotlin/time/Duration.kt
index 7690d94a2aa..ff27f4f1f8c 100644
--- a/libraries/stdlib/src/kotlin/time/Duration.kt
+++ b/libraries/stdlib/src/kotlin/time/Duration.kt
@@ -57,8 +57,6 @@ public inline class Duration internal constructor(internal val value: Double) :
     /** Returns a duration whose value is the difference between this and [other] duration values. */
     public operator fun minus(other: Duration): Duration = Duration(value - other.value)
 
-    // should we declare symmetric extension operators?
-
     /** Returns a duration whose value is this duration value multiplied by the given [scale] number. */
     public operator fun times(scale: Int): Duration = Duration(value * scale)
 
@@ -459,6 +457,19 @@ public val Long.days get() = toDuration(DurationUnit.DAYS)
 public val Double.days get() = toDuration(DurationUnit.DAYS)
 
 
+/** Returns a duration whose value is the specified [duration] value multiplied by this number. */
+@SinceKotlin("1.3")
+@ExperimentalTime
+@kotlin.internal.InlineOnly
+public inline operator fun Int.times(duration: Duration): Duration = duration * this
+
+/** Returns a duration whose value is the specified [duration] value multiplied by this number. */
+@SinceKotlin("1.3")
+@ExperimentalTime
+@kotlin.internal.InlineOnly
+public inline operator fun Double.times(duration: Duration): Duration = duration * this
+
+
 internal expect fun formatToExactDecimals(value: Double, decimals: Int): String
 internal expect fun formatUpToDecimals(value: Double, decimals: Int): String
 internal expect fun formatScientific(value: Double): String
\ No newline at end of file
diff --git a/libraries/stdlib/test/time/DurationTest.kt b/libraries/stdlib/test/time/DurationTest.kt
index 0e61da9633a..716ed927bec 100644
--- a/libraries/stdlib/test/time/DurationTest.kt
+++ b/libraries/stdlib/test/time/DurationTest.kt
@@ -233,6 +233,10 @@ class DurationTest {
         assertEquals(1.days, 12.hours * 2)
         assertEquals(1.days, 60.minutes * 24.0)
         assertEquals(1.microseconds, 20.nanoseconds * 50)
+
+        assertEquals(1.days, 2 * 12.hours)
+        assertEquals(12.5.hours, 12.5 * 60.minutes)
+        assertEquals(1.microseconds, 50 * 20.nanoseconds)
     }
 
     @Test