@@ -27,6 +27,13 @@ These release notes track our current efforts to document changes to the F# proj
is always implicit for this construct.
* In FCS API, FSharpParsingOptions, `CompilingFsLib` --> `CompilingFSharpCore`
* In FCS API, FSharpParsingOptions, `ErrorSeverityOptions` --> `DiagnosticOptions`
*[SynIdent](https://fsharp.github.io/fsharp-compiler-docs/reference/fsharp-compiler-syntax-synident.html#SynIdent) was introduced in the Untyped Syntax Tree.
This represent an `Ident` with potential additional information, stored as [IdentTrivia](https://fsharp.github.io/fsharp-compiler-docs/reference/fsharp-compiler-syntaxtrivia-identtrivia.html)).
*`LongIdentWithDots` was renamed to [SynLongIdent](https://fsharp.github.io/fsharp-compiler-docs/reference/fsharp-compiler-syntax-synlongident.html) and also could contain `IdentTrivia`.
Due to this change, infix operators are stored as `SynExpr.LongIdent` instead of `SynExpr.Ident`.
`a + b` is parsed as `SynLongIdent([op_Addition], [], [Some (OriginalNotation "+")])`.
*`SynMeasure` was extended with [SynMeasure.Paren](https://fsharp.github.io/fsharp-compiler-docs/reference/fsharp-compiler-syntax-synmeasure.html#Paren) case.
* Dynamic expressions (like `x?y`) are now represented as [SynExpr.Dynamic](https://fsharp.github.io/fsharp-compiler-docs/reference/fsharp-compiler-syntax-synexpr.html#Dynamic) in the Untyped Syntax Tree.
