Dedent `else:`

[brettcannon]

E.g.

if True:
   print()
   else: # Pressing 'enter' should dedent this line.

[karrtikr]

Prescribed solution

• Make sure vscode provides the functionality to - dedent the line we are editing.
• If there is one, use it.

[ericsnowcurrently]

This may not be possible currently. VSCode has the following API that we use in extension.ts:

https://code.visualstudio.com/api/references/vscode-api#LanguageConfiguration

We currently use onEnterRules, but indentationRules is another option. However, neither lets you indent the current line.

[ericsnowcurrently]

upstream: microsoft/vscode#66235

[brettcannon]

Turns out that Ruby has support through their language configuration file. It seems if you define a symbol for both indent and dedent (e.g. elsif or else) it will dedent the line but then begin indenting the next line. Not sure if this will work with how we currently do it:

vscode-python/src/client/extension.ts

Lines 179 to 198 in 796169c

	onEnterRules: [
	{
	beforeText: /^\s*(?:def|class|for|if|elif|else|while|try|with|finally|except|async)\b.*:\s*/,
	action: { indentAction: IndentAction.Indent }
	},
	{
	beforeText: /^(?!\s+\\)[^#\n]+\\\s*/,
	action: { indentAction: IndentAction.Indent }
	},
	{
	beforeText: /^\s*#.*/,
	afterText: /.+$/,
	action: { indentAction: IndentAction.None, appendText: '# ' }
	},
	{
	beforeText: /^\s+(continue|break|return)\b.*/,
	afterText: /\s+$/,
	action: { indentAction: IndentAction.Outdent }
	}
	]

If it won't work there then we should probably look at modernizing our configuration and switch over to the similar configuration file (the extension predates it).