34 lines
915 B
Text
34 lines
915 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, Sebastian Ullrich
|
|
-/
|
|
prelude
|
|
import init.lean.parser.parser
|
|
|
|
namespace Lean
|
|
namespace Parser
|
|
|
|
@[init mkBuiltinParsingTablesRef]
|
|
constant builtinLevelParsingTable : IO.Ref ParsingTables := default _
|
|
|
|
@[init] def regBuiltinLevelParserAttr : IO Unit :=
|
|
registerBuiltinParserAttribute `builtinLevelParser `Lean.Parser.builtinLevelParsingTable
|
|
|
|
def levelParser (rbp : Nat := 0) : Parser :=
|
|
{ fn := λ _, runBuiltinParser "universe level" builtinLevelParsingTable rbp }
|
|
|
|
/-
|
|
def_parser [builtinLevelParser]
|
|
paren := "(":max_prec; levelParser; ")":0
|
|
hole := "_":max_prec
|
|
imax := "imax"
|
|
max := "max"
|
|
num := numLit
|
|
id := ident
|
|
addLit := levelParser; "+":65; numLit
|
|
app := levelParser; levelParser maxPrec
|
|
-/
|
|
|
|
end Parser
|
|
end Lean
|