23 lines
699 B
Text
23 lines
699 B
Text
/-
|
|
Copyright (c) 2019 Microsoft Corporation. All rights reserved.
|
|
Released under Apache 2.0 license as described in the file LICENSE.
|
|
Authors: Leonardo de Moura
|
|
-/
|
|
prelude
|
|
import Init.Lean.Attributes
|
|
|
|
namespace Lean
|
|
namespace EqnCompiler
|
|
|
|
def mkMatchPatternAttr : IO TagAttribute :=
|
|
registerTagAttribute `matchPattern "mark that a definition can be used in a pattern (remark: the dependent pattern matching compiler will unfold the definition)"
|
|
|
|
@[init mkMatchPatternAttr]
|
|
constant matchPatternAttr : TagAttribute := arbitrary _
|
|
|
|
@[export lean_has_match_pattern_attribute]
|
|
def hasMatchPatternAttribute (env : Environment) (n : Name) : Bool :=
|
|
matchPatternAttr.hasTag env n
|
|
|
|
end EqnCompiler
|
|
end Lean
|