Hide Error Cases (for Go)

Tired of seeing if err != nil { return err }? This may help!

When you read Go codes, you may want to concentrate on normal cases rather than error cases (if err!= nil { return err }s). This extension may help you in such situation, by folding error case codes or/and making error case codes transparent.

Ideally, this feature should be officially provided by vscode-go, so, if you like my extension, let's up-vote this issue (golang/vscode-go#2311)!

Hide Error Cases Screenshot

This extension recognizes codes fulfilling followings as error case codes.

if, else-if, else blocks
Ending with return statement
Returning a object which is not static nil as a type that matches regexp defined in go.hideErrorCases.errorTypeRegexp

Features

Fold Error Cases

Ctrl+Shift+P and find & execute "Fold Error Cases" command, then error case codes in .go file opened in current editor will be folded. To unfold error case codes, Ctrl+Shift+P and execute "Unfold All" command (built-in command of VSCode). You can automatically fold error case codes every time you open .go files by configuring go.hideErrorCases.autoFold (Extensions > Hide Error Cases (Go) > Auto Fold on Settings UI).

Make Error Cases Transparent

Ctrl+Shift+P and find & execute "Make Error Cases Transparent" command, then error case codes in .go file opened in current editor will be transparent. You can automatically make error case codes transparent every time you open .go files by configuring go.hideErrorCases.autoMakeTransparent (Extensions > Hide Error Cases (Go) > Auto Make Transparent on Settings UI).

Auto-Fold/Auto-Make-transparent on save

You can perform auto-fold/auto-make-transparent feature above every time you save .go files by configuring go.hideErrorCases.hideOnSave (Extensions > Hide Error Cases (Go) > Hide On Save on Settings UI).

Requirements

go command is available on PATH.
go language extension is installed in VSCode.

Extension Settings

This extension contributes the following settings:

go.hideErrorCases.autoFold: enable/disable auto-fold feature
go.hideErrorCases.autoMakeTransparent: enable/disable auto-make-transparent feature
go.hideErrorCases.hideOnSave: enable/disable auto-fold-on-save/auto-make-transparent-on-save feature
go.hideErrorCases.errorCasesOpacity: configures opacity of error case codes
go.hideErrorCases.errorTypeRegexp: configures which type should be recognized as error type

1.0.8

Bug fix: fails to fold error cases returning errors using named return values. https://github.com/taqqanori/hide-error-cases/issues/5

Bug fix: folds wrong lines when there are multiple return statements under a if/else block. https://github.com/taqqanori/hide-error-cases/issues/6

1.0.7

Added hide-on-save feature Bug fix: folds wrong lines when opened .go file has changed quickly.

1.0.6

Revised README, fixed minor bugs.

1.0.5

Bug fix: not working for else-if and else, fails to fold nested if block.

1.0.4

Bug fix: could not recognize types with selector (like somepackage.MyError) as error types.

1.0.3

Introduced go.hideErrorCases.errorTypeRegexp setting, for working with any custom error types.

1.0.1~1.0.2

Just revised README, no functionality change.

1.0.0

Initial release of Hide Error Cases

Hide Error Cases

taqanori