[Rust] Fixed negative counting in CallInfo.GenericArgs (#4441)

Author: ncave

src/Fable.Cli/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+* [Rust] Fixed negative counting in CallInfo.GenericArgs (by @ncave)
 * [JS/TS] Improve `Regex.Escape` and `Regex.Unescape` handling (by @MangelMaxime)
 * [All] Fix allow plugins to target .NET6 target framework (by @MangelMaxime)
 * [Python] Fix function references passed as arguments inside tail-call optimised functions gaining unnecessary default parameters for outer TCO variables they don't reference (fix #3877)

src/Fable.Compiler/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+* [Rust] Fixed negative counting in CallInfo.GenericArgs (by @ncave)
 * [JS/TS] Improve `Regex.Escape` and `Regex.Unescape` handling (by @MangelMaxime)
 * [All] Fix allow plugins to target .NET6 target framework (by @MangelMaxime)
 * [Python] Fix function references passed as arguments inside tail-call optimised functions gaining unnecessary default parameters for outer TCO variables they don't reference (fix #3877)

src/Fable.Transforms/Rust/Fable2Rust.fs

@@ -2408,7 +2408,7 @@ module Util =
             match membOpt with
             | Some memb ->
                 let genArgsCount =
-                    (List.length callInfo.GenericArgs) - (List.length memb.GenericParameters)
+                    max 0 ((List.length callInfo.GenericArgs) - (List.length memb.GenericParameters))
 
                 let ownerGenArgs = callInfo.GenericArgs |> List.take genArgsCount
                 let membGenArgs = callInfo.GenericArgs |> List.skip genArgsCount

src/fable-standalone/test/bench-compiler/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "bench-compiler"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [[bin]]
 name = "bench-compiler"

src/quicktest-rust/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "fable_quicktest_rust"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 
 [dependencies]
 fable_library_rust = { path = "../../temp/fable-library-rust" }

tests/Rust/tests/src/ApplicativeTests.fs

@@ -631,16 +631,16 @@ let ``Trait calls work with record fields`` () =
     replaceById {Id=Id"ja"; Name="Voll"} ar |> Seq.head |> fun x -> equal "Sarah" x.Name
     replaceById {Id=Id"foo"; Name="Anna"} ar |> Seq.head |> fun x -> equal "Anna" x.Name
 
-// [<Fact>]
-// let ``Nested trait calls work`` () = // See #2468
-//     let i: int  = parse "123"
-//     let b: bool = parse "true"
-//     let p: Parseable = parse ""
-//     let h : DateTimeOffset = parse "2011-03-04T15:42:19+03:00"
-//     equal 123 i
-//     equal true b
-//     equal Parseable p
-//     equal (DateTimeOffset(2011, 3, 4, 15, 42, 19, TimeSpan.FromHours(3.))) h
+[<Fact>]
+let ``Nested trait calls work`` () = // See #2468
+    let i: int  = parse "123"
+    let b: bool = parse "true"
+    let p: Parseable = parse ""
+    let h : DateTimeOffset = parse "2011-03-04T15:42:19+03:00"
+    equal 123 i
+    equal true b
+    equal Parseable p
+    equal (DateTimeOffset(2011, 3, 4, 15, 42, 19, TimeSpan.FromHours(3.))) h
 
 [<Fact>]
 let ``Inline local function can call another inline function with trait call`` () =
@@ -1783,7 +1783,7 @@ module AccessorFunctionShorthand =
     let inline namePropertyGetter<'a when 'a:(member Name: string)> (x: 'a) = x |> _.Name
 
 [<Fact>]
-let ``test Accessor function shorthand works for records`` () =
+let ``Accessor function shorthand works for records`` () =
     let people : AccessorFunctionShorthand.User list =
         [
             { Name = "John" }
@@ -1794,7 +1794,7 @@ let ``test Accessor function shorthand works for records`` () =
     equal names ["John"; "Jane"]
 
 [<Fact>]
-let ``test Accessor function shorthand works for anonymous records`` () =
+let ``Accessor function shorthand works for anonymous records`` () =
     let people =
         [
             {| Name = "John" |}