38 lines
1.3 KiB
Text
38 lines
1.3 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
|
|
|
|
private def isValidCppId (id : String) : Bool :=
|
|
let first := id.get 0;
|
|
first.isAlpha && (id.toSubstring.drop 1).all (fun c => c.isAlpha || c.isDigit || c == '_')
|
|
|
|
private def isValidCppName : Name → Bool
|
|
| Name.str Name.anonymous s _ => isValidCppId s
|
|
| Name.str p s _ => isValidCppId s && isValidCppName p
|
|
| _ => false
|
|
|
|
def mkExportAttr : IO (ParametricAttribute Name) :=
|
|
registerParametricAttribute `export "name to be used by code generators" $ fun _ _ stx =>
|
|
match attrParamSyntaxToIdentifier stx with
|
|
| some exportName =>
|
|
if isValidCppName exportName then Except.ok exportName
|
|
else Except.error "invalid 'export' function name, is not a valid C++ identifier"
|
|
| _ => Except.error "unexpected kind of argument"
|
|
|
|
@[init mkExportAttr]
|
|
constant exportAttr : ParametricAttribute Name := arbitrary _
|
|
|
|
@[export lean_get_export_name_for]
|
|
def getExportNameFor (env : Environment) (n : Name) : Option Name :=
|
|
exportAttr.getParam env n
|
|
|
|
def isExport (env : Environment) (n : Name) : Bool :=
|
|
(getExportNameFor env n).isSome
|
|
|
|
end Lean
|