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RELEASE_NOTES.md

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Release notes

2020.1

Inspections / analyzers

  • Attributes

    • Add Redundant Attribute suffix analyzer and quick fix (by @reacheight (#109))
    • Add Redundant attribute parens analyzer and quick fix (by @reacheight (#104))

  • Run analyzers in parallel

  • Optimize spell-checker analyzer

  • Fix Spell-checker didn't work on some declarations

  • Improve reported ranges for unused sequential and let expressions

Quick fixes

  • FS0039: Undefined name

    • Better types filtering in Import Type quick fix
    • Escape module names when importing types
    • Fix various cases of incorrect open placement

  • FS0003: Not a function / unexpected argument

  • FS0026: match rule is never matched

  • FS0005: Field not mutable

    • Add Make field mutable

  • FS0027: Value not mutable

    • Add Make value mutable

  • FS1182: Unused let binding

    • Add Rename with _ prefix

  • FS0038: Var bound twice

    • Add Replace with _

  • Add parens to expression when applying quick fixes where needed

Intentions / Context actions

  • Add Elif to If, If to Elif actions
  • Add Negate If expression condition

Code vision

  • Add Copy Inferred Type action
  • Add Don't show parent namespaces for types
  • Fix Nested tuple params could be shown wrong

C# interop

  • Fix Symbols from C# projects could not be seen after first build
  • Fix Support for single case unions that are parsed as type abbreviations
  • Fix Invalid accessibility for some types containing non-public members
  • Fix Attributes containing Attribute wasn't seen properly from C# (e.g. AttributeUsage)

F# Interactive

  • Add Send project references to F# Interactive action
  • Fix Send to F# Interactive is now available during initial file indexing

Debugger

  • Add More expressions are supported in evaluation on mouse hover:
    • self-reference qualifiers in methods and types (this.Property)
    • indexer expressions ("foo".[1])

Find usages and Rename

  • Fix Types would not be found inside generic constraints, constructor attributes, and measures
  • Fix New Instance Creation wasn't reported for new expressions
  • Better naming style suggestions for literals

Highlighting

Add Highlight more escape sequences in strings Add Settings for F# preprocessor keywords Fix Highlighting for const keyword

Misc

  • Add Type file template
  • Select whole () expression in Extend Selection
  • Fix Plugin could not be built on case-sensitive file systems (by @ mcon (#108))

2019.3

Tools update and internals

  • Update FSharp.Compiler.Service with F# 4.7 support, most notably:
    • _ self identifier in member definitions
    • Implicit yield in computational expressions
    • F# 5.0 features preview when enabled with compiler option
  • Update Fantomas to 3.0 with various fixes
  • Rewritten parse tree nodes for expressions and types
    • Allows significantly simplified code for features like quick fixes, analyzers, and others
    • Better context tracking, optimized references creation, references are now qualifier-aware
    • Improved infrastructure for upcoming refactorings, postfix templates, and other features

Quick fixes

  • FS0039: Undefined name
    • Add Initial Import Type quick fix
    • Add Make outer function recursive fix
  • FS0020: Expression is unused
    • Add Introduce 'let' binding fix for local expressions
    • Update Ignore expression fix
      • Better |> ignore placement for multiline expressions
      • Option to ignore inner expression in match and if expressions
    • Add Remove subsequent expressions fix
  • FS1182: Unused let binding
    • Add Remove unused local binding
  • FS0597: Successive arguments should be separated by spaces, tupled, or parenthesized
    • Add Surround with parens fix
  • FS0001: Unit type expected
    • Add Ignore expression fix for if expressions without else branch
  • FS0066: Unnecessary upcast
    • Add Remove upcast fix
  • FS0588: Expected expression after let
    • Add Replace let with bound expression fix
  • FS0576: and is not allowed for non-recursive let bindings
    • Add To recursive let bindings fix
  • FS0894: Let bindings inside class cannot be inline
    • Add Remove inline fix

Inspections / Problem analyzers

  • Redundant new analyzer
    • Add Remove redundant new fix
  • Redundant identifier escaping
    • Add Remove backticks fix
  • Add Extension attribute usage analyzer:
    • Extension member inside non-extension type
    • Extension type doesn't define extension members
    • Extension type should be static

Rename

  • Rename additional symbols:
    • Suggest renaming of a single case union when renaming its case and vice versa
  • Suggest camelCase names for let bindings
  • Add renaming anonymous records fields
  • Fix renaming union case fields when used as named args
  • Fix renaming typed parameters inside lambda functions
  • Better naming sugestions for predefined types

Intentions / Context actions

  • Add To namespace/module action
  • Add To recursive module or namespace action

Extend selection

  • Rewritten from scratch for the parse tree changes
    • Words are selected first when invoked inside comments and strings
    • Better selection for many language constructs, with contributions by @reacheight
    • Fix declaration selection could miss starting keywords and attributes

Find usages

  • Parts of results grouping is rewritten from scratch for the parse tree changes
    • Fix various cases could be reported incorrectly

Typing assistance

  • Significantly improved undo/redo changes workflow
  • Add Complete pair escape identifier backticks assist
  • Add Escape identifier with backticks assist
  • Add Erase trailing semicolon in Enter assist when enabled in Code Style settings
  • Fix Pair quotes assists no longer applied inside comments
  • Update Better indentation in Enter assist

Highlighting

  • Separate highlighting options for F#:
    • Add F#-specific symbols like Unions or Active Patterns can now be highligted differently
  • Add Highlight byref values as mutable
  • Fix unary operators highlighting

Misc

  • Add option to specify language version for scripts and F# Interactive
  • Fix Don't use auto-detected code style settings in Reformat Code action
  • Add helper for Quick Definition
  • Fix record private representations resolve in C#
  • Fix adding new file to a project could fail
  • Update adding open now adds empty line when needed, by @saul (#65)
  • Update Ignore Folders on top option in F# projects
  • Fix getting F# Interactive paths
  • Fix resolve of extension members with specified compiled names
  • Update Don't show inferred type lenses inside object expressions

2019.2

Code Vision support

  • Inferred types are shown for functions, values and members
  • Version control author is shown for declarations

Code analysis

  • R# spell checker now works for F# symbol declarations, strings and comments
  • Escape sequences are highlighted in strings
  • Better highlighting of never matched rules in match expressions

Refactorings

  • Context-based rename suggestions

Quick Fixes

  • Generate missing record fields
  • Ignore unused expression
  • Remove unused self identifier in types
  • Remove unused as pattern
  • Replace unused pattern with _
  • Replace use with let in modules and types
  • Add missing rec in let ... and bindings

Find Usages & navigation

  • Find Usages and Go to Declaration now work for record construction and copy-and-update expressions
  • New Instance occurrence kind is shown for F# exception creation expressions

Misc

  • Allow running F# Interactive from .NET Core SDK 2.2.300+

Fixes

  • Completion for names starting with _ is fixed
  • Fix resolve for same type defined in different projects or assemblies
  • Fix resolve for members with same signature in a type and interface implementation in it
  • Rename wouldn't work for some local values
  • Lexing of attributes inside type application was fixed by @misonijnik (#51)

2019.1

Refactorings

  • Rename
    • Cross-language rename for F#-defined symbols
    • Name suggestions based on symbol type

Navigation and cross-language interop

  • Go to next/previous/containing member actions now work for top level let bindings
  • Global navigation and Go to File Member action now work for type-private let bindings
  • F# defined delegates are now supported and are properly seen by code in other languages
  • Intrinsic type extensions are now considered type parts with navigation working for every part
  • Navigation to compiler generated members declarations from usages in other languages now navigates to origin members
  • Navigation to symbols with escaped names now places caret inside escaped identifiers
  • outref and inref types are now properly seen in other languages

Find usages

  • Usages inside let bindings are properly grouped by containing members
  • Separate grouping for new occurrence kinds:
    • Type argument
    • Base type
    • Type checking
    • Type conversions
    • Module or namespace import
    • Write
    • Attribute reference
  • Highlight Usages in File action now highlights Write occurrences differently to other occurrences
  • Find usages of union cases now also searches for compiler generated union members

Code editing and completion

  • An option for out-of-scope completion to place open statements to the top level was added and enabled by default by @saul (#39)
  • Out-of-scope completion can be disabled now
  • New Surround with Parens typing assist

Code analysis

  • FSharp.Compiler.Service updated with anonymous records support
  • Format specifiers are now highlighted, by @vasily-kirichenko (#40)
  • Inferred generic arguments are shown in tooltips, by @vasily-kirichenko (#44)
  • Full member names are shown in tooltips, by @vasily-kirichenko (#45)
  • Debugger now shows local symbols values next to their uses
  • Unused local values analysis is now turned on for all projects and scripts by default
  • Support TreatWarningsAsErrors MSBuild property

Misc

  • Notification about F# projects having wrong project type guid in solution file
  • F# Interactive in FSharp.Compiler.Tools is now automatically found in non-SDK projects
  • FSharp.Compiler.Interactive.Settings.dll is now bundled to the plugin (so fsi object is available in scripts)
  • F# breadcrumbs provider was added
  • Add hotkey hint to Send to F# interactive action
  • Provide F# project Azure scope for Azure plugin (#46)

Fixes

  • Pair paren was not inserted in attributes list
  • Tab left action (Shift+Tab) didn't work
  • Tests defined as let bindings in types were not found
  • Incremental lexers were not reused, by @misonijnik
  • Type hierarchy action icon was shown in wrong places
  • Usages of operators using their compiled names were highlighted incorrectly
  • Find usages didn't work for compiled active patterns and some union cases
  • Local rename didn't work properly for symbols defined in Or patterns
  • Better highlighting of active pattern declarations
  • Extend Selection works better for patterns and match expressions
  • Resolve and navigation didn't work for optional extension members having the same name in a single module
  • Secondary constructors resolve was broken in other languages
  • Some reported errors were duplicated