Fix #2614 #2615

build.fsx

@@ -547,6 +547,7 @@ match BUILD_ARGS_LOWER with
 | "test-integration"::_ -> testIntegration()
 | "quicktest"::_ ->
     buildLibraryIfNotExists()
+    removeDirRecursive "src/quicktest/fable_modules"
     run "dotnet watch --project src/Fable.Cli run -- watch --cwd ../quicktest --exclude Fable.Core --noCache --runScript"
 
 | "run"::_ ->

src/Fable.Transforms/Replacements.fs

@@ -605,7 +605,10 @@ let toInt com (ctx: Context) r targetType (args: Expr list) =
         | JsNumber UInt32 -> emitJsExpr None (Number UInt32) [arg] "$0 >>> 0"
         | _ -> failwithf "Unexpected non-integer type %A" typeTo
     match sourceType, targetType with
-    | Char, _ -> Helper.InstanceCall(args.Head, "charCodeAt", targetType, [makeIntConst 0])
+    | Char, _ ->
+        match targetType, args with
+        | Number kind, Value(CharConstant c, r)::_ -> Value(NumberConstant(float c, kind), r)
+        | _ -> Helper.InstanceCall(args.Head, "charCodeAt", targetType, [makeIntConst 0])
     | String, _ -> stringToInt com ctx r targetType args
     | Builtin BclBigInt, _ -> Helper.LibCall(com, "BigInt", castBigIntMethod targetType, targetType, args)
     | NumberExt typeFrom, NumberExt typeTo  ->
@@ -696,7 +699,12 @@ let applyOp (com: ICompiler) (ctx: Context) r t opName (args: Expr list) argType
         Operation(Logical(op, left, right), Boolean, r)
     let nativeOp opName argTypes args =
         match opName, args with
-        | Operators.addition, [left; right] -> binOp BinaryPlus left right
+        | Operators.addition, [left; right] ->
+            match argTypes with
+            | Char::_ ->
+                let toUInt16 e = toInt com ctx None (Number UInt16) [e]
+                Operation(Binary(BinaryPlus, toUInt16 left, toUInt16 right), Number UInt16, r) |> toChar
+            | _ -> binOp BinaryPlus left right
         | Operators.subtraction, [left; right] -> binOp BinaryMinus left right
         | Operators.multiply, [left; right] -> binOp BinaryMultiply left right
         | (Operators.division | Operators.divideByInt), [left; right] ->
@@ -1622,6 +1630,12 @@ let operators (com: ICompiler) (ctx: Context) r t (i: CallInfo) (thisArg: Expr o
     | "Sign", _ ->
         let args = toFloat com ctx r t args |> List.singleton
         Helper.LibCall(com, "Util", "sign", t, args, i.SignatureArgTypes, ?loc=r) |> Some
+    | "DivRem", _ ->
+        let modName =
+            match i.SignatureArgTypes with
+            | Builtin (BclInt64)::_ -> "Long"
+            | _ -> "Int32"
+        Helper.LibCall(com, modName, "divRem", t, args, i.SignatureArgTypes, ?loc=r) |> Some
     // Numbers
     | ("Infinity"|"InfinitySingle"), _ ->
         Helper.GlobalIdent("Number", "POSITIVE_INFINITY", t, ?loc=r) |> Some

src/fable-library/Int32.ts

@@ -132,3 +132,14 @@ export function op_UnaryNegation_Int16(x: number) {
 export function op_UnaryNegation_Int32(x: number) {
   return x === -2147483648 ? x : -x;
 }
+
+export function divRem(x: number, y: number, out?: FSharpRef<number>) {
+  const div = ~~(x / y);
+  const rem = x % y;
+  if (out != null) {
+    out.contents = rem;
+    return div;
+  } else {
+    return [div, rem];
+  }
+}

src/fable-library/Long.ts

@@ -143,3 +143,14 @@ export function ticksToUnixEpochMilliseconds(ticks: Long) {
 //     }
 //   };
 // }
+
+export function divRem(x: Long, y: Long, out?: FSharpRef<Long>) {
+  const div = op_Division(x, y);
+  const rem = op_Modulus(x, y);
+  if (out != null) {
+    out.contents = rem;
+    return div;
+  } else {
+    return [div, rem];
+  }
+}

tests/Main/ArithmeticTests.fs

@@ -56,6 +56,28 @@ let tests =
     testCase "Infix modulo can be generated" <| fun () ->
         4 % 3 |> equal 1
 
+    testCase "Math.DivRem works with ints" <| fun () ->
+        Math.DivRem(5, 2) |> equal (2, 1)
+        Math.DivRem(4, 2) |> equal (2, 0)
+
+    testCase "Math.DivRem works with ints and ref" <| fun () ->
+        let rem = ref -1
+        Math.DivRem(5, 2, rem) |> equal 2
+        rem.Value |> equal 1
+        Math.DivRem(4, 2, rem) |> equal 2
+        rem.Value |> equal 0
+
+    testCase "Math.DivRem works with longs" <| fun () ->
+        Math.DivRem(5L, 2L) |> equal (2L, 1L)
+        Math.DivRem(4L, 2L) |> equal (2L, 0L)
+
+    testCase "Math.DivRem works with longs and ref" <| fun () ->
+        let rem = ref -1L
+        Math.DivRem(5L, 2L, rem) |> equal 2L
+        rem.Value |> equal 1L
+        Math.DivRem(4L, 2L, rem) |> equal 2L
+        rem.Value |> equal 0L
+
     testCase "Evaluation order is preserved by generated code" <| fun () ->
         (4 - 2) * 2 + 1 |> equal 5
 

tests/Main/CharTests.fs

@@ -214,4 +214,8 @@ let tests =
                 |> failwithf "Unexpected result '%c'"
             with
             | _ -> ()
+
+        testCase "Char addition works" <| fun _ ->
+            'A' + 'B' |> int |> equal 131
+            'A' + char 7 |> int |> equal 72
     ]