30 lines
983 B
Text
30 lines
983 B
Text
/-
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Copyright (c) 2019 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Leonardo de Moura, Sebastian Ullrich
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-/
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import Lean.Parser.Extra
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namespace Lean
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namespace Parser
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builtin_initialize
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registerBuiltinParserAttribute `builtinLevelParser `level
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@[inline] def levelParser (rbp : Nat := 0) : Parser :=
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categoryParser `level rbp
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namespace Level
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@[builtinLevelParser] def paren := parser! "(" >> levelParser >> ")"
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@[builtinLevelParser] def max := parser! nonReservedSymbol "max " true >> many1 (levelParser maxPrec)
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@[builtinLevelParser] def imax := parser! nonReservedSymbol "imax " true >> many1 (levelParser maxPrec)
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@[builtinLevelParser] def hole := parser! "_"
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@[builtinLevelParser] def num := checkPrec maxPrec >> numLit
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@[builtinLevelParser] def ident := checkPrec maxPrec >> Parser.ident
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@[builtinLevelParser] def addLit := tparser!:65 " + " >> numLit
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end Level
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end Parser
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end Lean
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