X-Git-Url: https://git.pterodactylus.net/?p=Sone.git;a=blobdiff_plain;f=src%2Fmain%2Fkotlin%2Fnet%2Fpterodactylus%2Fsone%2Futils%2FMemoize.kt;fp=src%2Fmain%2Fkotlin%2Fnet%2Fpterodactylus%2Fsone%2Futils%2FMemoize.kt;h=bd67ae24d12ed40b12990a45a40049311fc6d41a;hp=0000000000000000000000000000000000000000;hb=e162d6ab265676e27b784b825a3c97d271635947;hpb=a9c9094ae93da0d112df6bb1a1d601cde4abe4ff

diff --git a/src/main/kotlin/net/pterodactylus/sone/utils/Memoize.kt b/src/main/kotlin/net/pterodactylus/sone/utils/Memoize.kt
new file mode 100644
index 0000000..bd67ae2
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/utils/Memoize.kt
@@ -0,0 +1,12 @@
+package net.pterodactylus.sone.utils
+
+class Memoize<in T, out R>(private val calc: (T) -> R) : (T) -> R {
+
+	private val values = mutableMapOf<T, R>()
+
+	override fun invoke(value: T) =
+			values.getOrPut(value, { calc(value) })
+
+}
+
+fun <T, R> ((T) -> R).memoize(): (T) -> R = Memoize(this)