51 lines
1.9 KiB
Text
51 lines
1.9 KiB
Text
/-
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Copyright (c) 2020 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
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-/
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import Lean.Parser.Basic
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import Lean.Parser.Extra
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namespace Lean.Parser
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builtin_initialize
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registerBuiltinParserAttribute `builtinPrioParser `prio LeadingIdentBehavior.both
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registerBuiltinDynamicParserAttribute `prioParser `prio
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builtin_initialize
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registerBuiltinParserAttribute `builtinAttrParser `attr LeadingIdentBehavior.symbol
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registerBuiltinDynamicParserAttribute `attrParser `attr
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@[inline] def priorityParser (rbp : Nat := 0) : Parser :=
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categoryParser `prio rbp
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@[inline] def attrParser (rbp : Nat := 0) : Parser :=
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categoryParser `attr rbp
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attribute [runBuiltinParserAttributeHooks]
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priorityParser attrParser
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namespace Priority
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@[builtinPrioParser] def numPrio := checkPrec maxPrec >> numLit
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attribute [runBuiltinParserAttributeHooks] numPrio
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end Priority
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namespace Attr
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@[builtinAttrParser] def simple := parser! ident >> optional (priorityParser <|> ident)
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/- Remark, We can't use `simple` for `class`, `instance`, `export`, and `macro` because they are keywords. -/
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@[builtinAttrParser] def «macro» := parser! "macro " >> ident
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@[builtinAttrParser] def «export» := parser! "export " >> ident
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/- We don't use `simple` for recursor because the argument is not a priority-/
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@[builtinAttrParser] def recursor := parser! nonReservedSymbol "recursor " >> numLit
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@[builtinAttrParser] def «class» := parser! "class"
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@[builtinAttrParser] def «instance» := parser! "instance" >> optional priorityParser
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@[builtinAttrParser] def defaultInstance := parser! nonReservedSymbol "defaultInstance " >> optional priorityParser
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def externEntry := parser! optional ident >> optional (nonReservedSymbol "inline ") >> strLit
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@[builtinAttrParser] def extern := parser! nonReservedSymbol "extern " >> optional numLit >> many externEntry
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end Attr
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end Lean.Parser
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