a2abbdbf9a
This is just a draft. ``` for f in `find . -name '*.lean'`; do echo $f; gsed "/^import/s/\b\(.\)/\u\1/g" $f > tmp; gsed "/^Import/s/Import/import/g" tmp > $f; done ```
34 lines
1.2 KiB
Text
34 lines
1.2 KiB
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 Compiler
|
|
|
|
def mkImplementedByAttr : IO (ParametricAttribute Name) :=
|
|
registerParametricAttribute `implementedBy "name of the Lean (probably unsafe) function that implements opaque constant" $ fun env declName stx =>
|
|
match env.find declName with
|
|
| none => Except.error "unknown declaration"
|
|
| some decl =>
|
|
match attrParamSyntaxToIdentifier stx with
|
|
| some fnName =>
|
|
match env.find fnName with
|
|
| none => Except.error ("unknown function '" ++ toString fnName ++ "'")
|
|
| some fnDecl =>
|
|
if decl.type == fnDecl.type then Except.ok fnName
|
|
else Except.error ("invalid function '" ++ toString fnName ++ "' type mismatch")
|
|
| _ => Except.error "expected identifier"
|
|
|
|
@[init mkImplementedByAttr]
|
|
constant implementedByAttr : ParametricAttribute Name := default _
|
|
|
|
@[export lean_get_implemented_by]
|
|
def getImplementedBy (env : Environment) (n : Name) : Option Name :=
|
|
implementedByAttr.getParam env n
|
|
|
|
end Compiler
|
|
end Lean
|