feat: Upgrade Fable to 5.15

.config/dotnet-tools.json

@@ -10,7 +10,7 @@
       "rollForward": false
     },
     "fable": {
-      "version": "5.13.0",
+      "version": "5.15.0",
       "commands": [
         "fable"
       ],

pyproject.toml

@@ -7,7 +7,7 @@ requires-python = ">= 3.12, < 4"
 readme = "README.md"
 license = "MIT"
 dependencies = [
-    "fable-library==5.13.0",
+    "fable-library==5.15.0",
     "pyright>=1.1.411",
 ]
 

src/fable/Types.fs

@@ -1,6 +1,6 @@
 /// Utilities for detecting and working with Fable types at runtime in Python.
 /// These helpers are useful when you need to distinguish between native Python types
-/// and Fable-compiled F# types (e.g., Int32, Float64, FSharpArray).
+/// and Fable-compiled F# types (e.g., int, float, Int64, FSharpArray).
 module Fable.Python.Fable.Types
 
 open Fable.Core
@@ -9,9 +9,11 @@ open Fable.Core
 [<Emit("type($0).__name__")>]
 let typeName (o: obj) : string = nativeOnly
 
-/// Check if an object is a Fable integral type (Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64)
+/// Check if an object is an F# integral type.
+/// The default F# int compiles to Python's native int; other widths use Fable runtime types.
 let isIntegralType (o: obj) : bool =
     match typeName o with
+    | "int"
     | "Int8"
     | "Int16"
     | "Int32"
@@ -22,9 +24,12 @@ let isIntegralType (o: obj) : bool =
     | "UInt64" -> true
     | _ -> false
 
-/// Check if an object is a Fable numeric type (integral types + Float32, Float64)
+/// Check if an object is an F# numeric type.
+/// The default F# int and float compile to Python's native int and float.
 let isNumericType (o: obj) : bool =
     match typeName o with
+    | "int"
+    | "float"
     | "Int8"
     | "Int16"
     | "Int32"

test/TestTypes.fs

@@ -6,19 +6,19 @@ open Fable.Python.Fable.Types
 // Test typeName function
 
 [<Fact>]
-let ``test typeName returns Int32 for int`` () =
+let ``test typeName returns int for int`` () =
     let value = 42
-    typeName value |> equal "Int32"
+    typeName value |> equal "int"
 
 [<Fact>]
 let ``test typeName returns Int64 for int64`` () =
     let value = 42L
     typeName value |> equal "Int64"
 
 [<Fact>]
-let ``test typeName returns Float64 for float`` () =
+let ``test typeName returns float for float`` () =
     let value = 3.14
-    typeName value |> equal "Float64"
+    typeName value |> equal "float"
 
 [<Fact>]
 let ``test typeName returns str for string`` () =