Fantomas is an open source extension aiming at formatting F# source files based on a given configuration. It ensures correct indentation and consistent spacing between elements in the source files.

Some common use cases include (1) Reformatting a code base to conform a universal page width (2) Converting legacy code from verbose syntax to light syntax (3) Formatting auto-generated F# signatures.

Please visit the user guide page here.

For bug reports and suggestions for improvement, go to the home page.

Main features:

- Format documents

- Format selections

- Support all F# 3.1 constructs (new since v1.0.5)

- Preserve inline, multiline and block comments

- Preserve preprocessor directives

- Format cursor positions (new since v0.7.0)

- Reorder open statements (new since v0.7.0)

RELEASE NOTES:

v1.4.0 (09-08-2014):

Bugfix release

v1.1.0 (17-04-2014):

Bugfix release

v1.0.5 (07-01-2014):

Fully support F# 3.1
Compatible with F# on Mono
Handle external functions
Improve support of multiline strings
Implement various bug fixes

v1.0.4 (16-11-2013):

Implement various bug fixes

v1.0.3 (04-10-2013):

Implement various bug fixes
Synchronize version numbers with NuGet packages

v0.7.1 (11-09-2013):

Support Visual Studio 2013 (not support F# 3.1 constructs yet)

v0.7.0 (16-08-2013):

Implement formatting cursor positions
Implement reordering of open statements
Enhance indentation of anonymous functions
Add line breaks for nested let bindings
Implement various bug fixes

v0.5.0 (16-07-2013):

Improve formatting of signatures
Improve UI interaction
Enhance spacing of function applications and arguments
Implement various bug fixes

v0.4.1 (02-07-2013):

Initial release