Initial setup for code action attributes

• @[hole_code_action] and @[command_code_action] now live in the Lean repository, and are builtin.

• Attribute @[tactic_code_action] collects code actions which will be called on each occurrence of a tactic.

@[reducible, inline]

abbrev Std.CodeAction.TacticCodeAction : Type

A tactic code action extension.

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@[reducible, inline]

abbrev Std.CodeAction.TacticSeqCodeAction : Type

A tactic code action extension.

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def Std.CodeAction.mkTacticCodeAction (n : Lean.Name) : Lean.ImportM Std.CodeAction.TacticCodeAction

Read a tactic code action from a declaration of the right type.

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def Std.CodeAction.mkTacticSeqCodeAction (n : Lean.Name) : Lean.ImportM Std.CodeAction.TacticSeqCodeAction

Read a tacticSeq code action from a declaration of the right type.

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structure Std.CodeAction.TacticCodeActionEntry : Type

An entry in the tactic code actions extension, containing the attribute arguments.

• declName : Lean.Name

  The declaration to tag

• tacticKinds : Array Lean.Name

  The tactic kinds that this extension supports. If empty it is called on all tactic kinds.

instance Std.CodeAction.instInhabitedTacticCodeActionEntry : Inhabited Std.CodeAction.TacticCodeActionEntry

Equations

• Std.CodeAction.instInhabitedTacticCodeActionEntry = { default := { declName := default, tacticKinds := default } }

structure Std.CodeAction.TacticCodeActions : Type

The state of the tactic code actions extension.

• onAnyTactic : Array Std.CodeAction.TacticCodeAction

  The list of tactic code actions to apply on any tactic.

• onTactic : Lean.NameMap (Array Std.CodeAction.TacticCodeAction)

  The list of tactic code actions to apply when a particular tactic kind is highlighted.

instance Std.CodeAction.instInhabitedTacticCodeActions : Inhabited Std.CodeAction.TacticCodeActions

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• Std.CodeAction.instInhabitedTacticCodeActions = { default := { onAnyTactic := default, onTactic := default } }

def Std.CodeAction.TacticCodeActions.insert (self : Std.CodeAction.TacticCodeActions) (tacticKinds : Array Lean.Name) (action : Std.CodeAction.TacticCodeAction) : Std.CodeAction.TacticCodeActions

Insert a tactic code action entry into the TacticCodeActions structure.

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opaque Std.CodeAction.tacticSeqCodeActionExt : Lean.PersistentEnvExtension Lean.Name (Lean.Name × Std.CodeAction.TacticSeqCodeAction) (Array Lean.Name × Array Std.CodeAction.TacticSeqCodeAction)

An extension which collects all the tactic code actions.

opaque Std.CodeAction.tacticCodeActionExt : Lean.PersistentEnvExtension Std.CodeAction.TacticCodeActionEntry (Std.CodeAction.TacticCodeActionEntry × Std.CodeAction.TacticCodeAction) (Array Std.CodeAction.TacticCodeActionEntry × Std.CodeAction.TacticCodeActions)

An extension which collects all the tactic code actions.

def Std.CodeAction.tactic_code_action : Lean.ParserDescr

This attribute marks a code action, which is used to suggest new tactics or replace existing ones.

• @[tactic_code_action]: This is a code action which applies to the spaces between tactics, to suggest a new tactic to change the goal state.

• @[tactic_code_action kind]: This is a code action which applies to applications of the tactic kind (a tactic syntax kind), which can replace the tactic or insert things before or after it.

• @[tactic_code_action kind₁ kind₂]: shorthand for @[tactic_code_action kind₁, tactic_code_action kind₂].

• @[tactic_code_action *]: This is a tactic code action that applies to all tactics. Use sparingly.

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