From 2705c0cd4952d4c317ea1a0d610bb95fcc1826a5 Mon Sep 17 00:00:00 2001
From: otya128 <otya128@users.noreply.github.com>
Date: Sat, 3 Sep 2016 18:33:45 +0900
Subject: [PATCH] =?UTF-8?q?ACOS=E3=81=A8ASIN=E3=81=AB=E7=AF=84=E5=9B=B2?=
 =?UTF-8?q?=E3=83=81=E3=82=A7=E3=83=83=E3=82=AF=E3=82=92=E8=BF=BD=E5=8A=A0?=
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---
 SMILEBASIC/builtinfunctions.d | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/SMILEBASIC/builtinfunctions.d b/SMILEBASIC/builtinfunctions.d
index 1663b19..777b696 100644
--- a/SMILEBASIC/builtinfunctions.d
+++ b/SMILEBASIC/builtinfunctions.d
@@ -141,9 +141,16 @@ class BuiltinFunction
     {
         return sin(arg1);
     }
-    static pure nothrow double ASIN(double arg1)
+    static double ASIN(double arg1)
     {
-        return asin(arg1);
+        if (arg1 >= -1 && arg1 <= 1)
+        {
+            return asin(arg1);
+        }
+        else
+        {
+            throw new OutOfRange();
+        }
     }
     static pure nothrow double SINH(double arg1)
     {
@@ -153,9 +160,16 @@ class BuiltinFunction
     {
         return cos(arg1);
     }
-    static pure nothrow double ACOS(double arg1)
+    static double ACOS(double arg1)
     {
-        return acos(arg1);
+        if (arg1 >= -1 && arg1 <= 1)
+        {
+            return acos(arg1);
+        }
+        else
+        {
+            throw new OutOfRange();
+        }
     }
     static pure nothrow double COSH(double arg1)
     {