Fix arguments naming and escape operator name in usageHtml

src/FSharp.Formatting.ApiDocs/GenerateModel.fs

@@ -1275,7 +1275,7 @@ module internal TypeFormatter =
         argName, argType
 
     // Format each argument, including its name and type
-    let formatArgUsageAsHtml _ctx i (arg: FSharpParameter) =
+    let formatArgUsageAsHtml i (arg: FSharpParameter) =
         let argName, _argType = formatArgNameAndType i arg
         !!argName
 
@@ -1462,32 +1462,24 @@ module internal SymbolReader =
             | _, false, _, name, _ when PrettyNaming.IsMangledOpName v.CompiledName ->
                 match argInfos with
                 // binary operators (taking a tuple)
-                | [ [ x; y ] ] ->
-                    let left = formatCurriedArgsUsageAsHtml true false [ [ x ] ]
-
-                    let nm = PrettyNaming.DecompileOpName v.CompiledName
-
-                    let right = formatCurriedArgsUsageAsHtml true false [ [ y ] ]
-
-                    span [] [ left; !! " "; !!nm; !! " "; right ]
-
+                | [ [ x; y ] ]
                 // binary operators (curried, like in FSharp.Core.Operators)
-                | [ args1; args2 ] ->
-                    let left = formatCurriedArgsUsageAsHtml true false [ args1 ]
+                | [ [ x ]; [ y ] ] ->
+                    let left = formatArgUsageAsHtml 0 x
 
                     let nm = PrettyNaming.DecompileOpName v.CompiledName
 
-                    let right = formatCurriedArgsUsageAsHtml true false [ args2 ]
+                    let right = formatArgUsageAsHtml 1 y
 
-                    span [] [ left; !! " "; !!nm; !! " "; right ]
+                    span [] [ left; !! " "; encode nm; !! " "; right ]
 
                 // unary operators
                 | [ [ x ] ] ->
                     let nm = PrettyNaming.DecompileOpName v.CompiledName
 
-                    let right = formatCurriedArgsUsageAsHtml true false [ [ x ] ]
+                    let right = formatArgUsageAsHtml 0 x
 
-                    span [] [ !!nm; right ]
+                    span [] [ encode nm; right ]
                 | _ ->
                     span
                         []

tests/FSharp.ApiDocs.Tests/ApiDocsTests.fs

@@ -253,6 +253,24 @@ let ``ApiDocs works on two sample F# assemblies`` (format: OutputFormat) =
     files.[(sprintf "fslib-union.%s" format.Extension)]
     |> shouldContainText "<span>Naming(<span>rate,&#32;string</span>)</span>"
 
+    // Check that operators are encoded
+
+    // arg0 <&> arg1
+    files[$"fslib-operatorswithfsi.%s{format.Extension}"]
+    |> shouldContainText "arg0&#32;&lt;&amp;&gt;&#32;arg1"
+
+    // x ?<? y
+    files[$"fslib-operatorswithfsi.%s{format.Extension}"]
+    |> shouldContainText "x&#32;?&lt;?&#32;y"
+
+    // <?arg0
+    files[$"fslib-operatorswithfsi.%s{format.Extension}"]
+    |> shouldContainText "&lt;?arg0"
+
+    // <?>x
+    files[$"fslib-operatorswithfsi.%s{format.Extension}"]
+    |> shouldContainText "&lt;?&gt;x"
+
     (* This may be addressed in a separate issue or removed if not an issue.
   // Check that implict cast operator is generated correctly
   files.[(sprintf "fslib-space-missing-implicit-cast.%s" format.Extension)] |> shouldContainText "<code><span>op_Implicit&#32;<span>source</span></span></code>"

tests/FSharp.ApiDocs.Tests/files/FsLib1/FsLib1.fsproj

@@ -6,6 +6,8 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Library1.fs" />
+    <Compile Include="OperatorsWithFsi.fsi" />
+    <Compile Include="OperatorsWithFsi.fs" />
     <None Include="paket.references" />
   </ItemGroup>
   <Import Project="..\..\..\..\.paket\Paket.Restore.targets" />

tests/FSharp.ApiDocs.Tests/files/FsLib1/OperatorsWithFsi.fs

@@ -0,0 +1,6 @@
+module FsLib.OperatorsWithFsi
+
+let ( <&> ) x y = x > y
+let ( ?<? ) x y = x > y
+let (<?) x = x
+let (<?>) x = x

tests/FSharp.ApiDocs.Tests/files/FsLib1/OperatorsWithFsi.fsi

@@ -0,0 +1,14 @@
+module FsLib.OperatorsWithFsi
+
+/// <summary>The binary operator 1</summary>
+val ( <&> ): 'T -> 'T -> bool when 'T : comparison
+
+/// <summary>The binary operator 2</summary>
+val ( ?<? ): x: 'T -> y: 'T -> bool when 'T : comparison
+
+/// <summary>The unary operator 1</summary>
+val (<?): 'T -> 'T
+
+/// <summary>The unary operator 2</summary>
+val (<?>): x: 'T -> 'T
+