58 lines
2.5 KiB
Text
58 lines
2.5 KiB
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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prelude
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import init.lean.parser.term
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namespace Lean
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namespace Parser
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@[init mkBuiltinParsingTablesRef]
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constant builtinCommandParsingTable : IO.Ref ParsingTables := default _
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@[init] def regBuiltinCommandParserAttr : IO Unit :=
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registerBuiltinParserAttribute `builtinCommandParser `Lean.Parser.builtinCommandParsingTable
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def commandParserFn {k : ParserKind} (rbp : Nat) : ParserFn k :=
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fun _ => runBuiltinParser "command" builtinCommandParsingTable rbp
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def commandParser (rbp : Nat := 0) : Parser :=
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{ fn := commandParserFn rbp }
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namespace Command
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def commentBody : Parser :=
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{ fn := rawFn (fun _ => finishCommentBlock 1) true }
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def docComment := parser! "/--" >> commentBody
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def attrArg : Parser := ident <|> strLit <|> numLit
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def attrInstance := parser! ident >> many attrArg
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def attributes := parser! "@[" >> sepBy1 attrInstance ", " >> "]"
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def «private» := parser! "private"
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def «protected» := parser! "protected"
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def visibility := «private» <|> «protected»
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def «noncomputable» := parser! "noncomputable"
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def «unsafe» := parser! "unsafe"
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def declModifiers := parser! optional docComment >> optional «attributes» >> optional visibility >> optional «noncomputable» >> optional «unsafe»
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def declId := parser! ident >> optional (".{" >> sepBy1 ident ", " >> "}")
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def declSig := parser! many Term.bracktedBinder >> Term.typeSpec
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def optDeclSig := parser! many Term.bracktedBinder >> Term.optType
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def declValSimple := parser! " := " >> termParser
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def declValEqns := parser! many1Indent Term.equation "equations must be indented"
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def declVal := declValSimple <|> declValEqns
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def «abbrev» := parser! "abbrev " >> declId >> optDeclSig >> declVal
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def «def» := parser! "def " >> declId >> optDeclSig >> declVal
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def «theorem» := parser! "theorem " >> declId >> declSig >> declVal
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def «constant» := parser! "constant " >> declId >> declSig >> optional declValSimple
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def «instance» := parser! "instance " >> optional declId >> declSig >> declVal
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def «axiom» := parser! "axiom " >> declId >> declSig
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def «example» := parser! "example " >> declSig >> declVal
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@[builtinCommandParser] def declaration :=
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declModifiers >> («abbrev» <|> «def» <|> «theorem» <|> «constant» <|> «instance» <|> «axiom» <|> «example»)
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end Command
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end Parser
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end Lean
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