82 lines
5.5 KiB
Text
82 lines
5.5 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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import Lean.Parser.Command
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namespace Lean
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namespace Parser
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builtin_initialize
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registerBuiltinParserAttribute `builtin_syntax_parser ``Category.stx .both
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registerBuiltinDynamicParserAttribute `stx_parser `stx
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builtin_initialize
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registerBuiltinParserAttribute `builtin_prec_parser ``Category.prec .both
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registerBuiltinDynamicParserAttribute `prec_parser `prec
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@[inline] def precedenceParser (rbp : Nat := 0) : Parser :=
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categoryParser `prec rbp
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@[inline] def syntaxParser (rbp : Nat := 0) : Parser :=
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categoryParser `stx rbp
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def «precedence» := leading_parser ":" >> precedenceParser maxPrec
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def optPrecedence := optional (atomic «precedence»)
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namespace Syntax
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@[builtin_prec_parser] def numPrec := checkPrec maxPrec >> numLit
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@[builtin_syntax_parser] def paren := leading_parser "(" >> many1 syntaxParser >> ")"
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@[builtin_syntax_parser] def cat := leading_parser ident >> optPrecedence
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@[builtin_syntax_parser] def unary := leading_parser ident >> checkNoWsBefore >> "(" >> many1 syntaxParser >> ")"
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@[builtin_syntax_parser] def binary := leading_parser ident >> checkNoWsBefore >> "(" >> many1 syntaxParser >> ", " >> many1 syntaxParser >> ")"
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@[builtin_syntax_parser] def sepBy := leading_parser "sepBy(" >> many1 syntaxParser >> ", " >> strLit >> optional (", " >> many1 syntaxParser) >> optional (", " >> nonReservedSymbol "allowTrailingSep") >> ")"
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@[builtin_syntax_parser] def sepBy1 := leading_parser "sepBy1(" >> many1 syntaxParser >> ", " >> strLit >> optional (", " >> many1 syntaxParser) >> optional (", " >> nonReservedSymbol "allowTrailingSep") >> ")"
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@[builtin_syntax_parser] def atom := leading_parser strLit
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@[builtin_syntax_parser] def nonReserved := leading_parser "&" >> strLit
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end Syntax
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namespace Command
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def namedName := leading_parser (atomic ("(" >> nonReservedSymbol "name") >> " := " >> ident >> ")")
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def optNamedName := optional namedName
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def «prefix» := leading_parser "prefix"
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def «infix» := leading_parser "infix"
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def «infixl» := leading_parser "infixl"
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def «infixr» := leading_parser "infixr"
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def «postfix» := leading_parser "postfix"
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def mixfixKind := «prefix» <|> «infix» <|> «infixl» <|> «infixr» <|> «postfix»
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@[builtin_command_parser] def «mixfix» := leading_parser optional docComment >> optional Term.«attributes» >> Term.attrKind >> mixfixKind >> precedence >> optNamedName >> optNamedPrio >> ppSpace >> strLit >> darrow >> termParser
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-- NOTE: We use `suppressInsideQuot` in the following parsers because quotations inside them are evaluated in the same stage and
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-- thus should be ignored when we use `checkInsideQuot` to prepare the next stage for a builtin syntax change
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def identPrec := leading_parser ident >> optPrecedence
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def optKind : Parser := optional ("(" >> nonReservedSymbol "kind" >> ":=" >> ident >> ")")
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def notationItem := ppSpace >> withAntiquot (mkAntiquot "notationItem" `Lean.Parser.Command.notationItem) (strLit <|> identPrec)
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@[builtin_command_parser] def «notation» := leading_parser optional docComment >> optional Term.«attributes» >> Term.attrKind >> "notation" >> optPrecedence >> optNamedName >> optNamedPrio >> many notationItem >> darrow >> termParser
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@[builtin_command_parser] def «macro_rules» := suppressInsideQuot (leading_parser optional docComment >> optional Term.«attributes» >> Term.attrKind >> "macro_rules" >> optKind >> Term.matchAlts)
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@[builtin_command_parser] def «syntax» := leading_parser optional docComment >> optional Term.«attributes» >> Term.attrKind >> "syntax " >> optPrecedence >> optNamedName >> optNamedPrio >> many1 (syntaxParser argPrec) >> " : " >> ident
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@[builtin_command_parser] def syntaxAbbrev := leading_parser optional docComment >> "syntax " >> ident >> " := " >> many1 syntaxParser
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def catBehaviorBoth := leading_parser nonReservedSymbol "both"
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def catBehaviorSymbol := leading_parser nonReservedSymbol "symbol"
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def catBehavior := optional ("(" >> nonReservedSymbol "behavior" >> " := " >> (catBehaviorBoth <|> catBehaviorSymbol) >> ")")
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@[builtin_command_parser] def syntaxCat := leading_parser optional docComment >> "declare_syntax_cat " >> ident >> catBehavior
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def macroArg := leading_parser optional (atomic (ident >> checkNoWsBefore "no space before ':'" >> ":")) >> syntaxParser argPrec
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def macroRhs : Parser := leading_parser withPosition termParser
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def macroTail := leading_parser atomic (" : " >> ident) >> darrow >> macroRhs
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@[builtin_command_parser] def «macro» := leading_parser suppressInsideQuot (optional docComment >> optional Term.«attributes» >> Term.attrKind >> "macro " >> optPrecedence >> optNamedName >> optNamedPrio >> many1 macroArg >> macroTail)
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@[builtin_command_parser] def «elab_rules» := leading_parser suppressInsideQuot (optional docComment >> optional Term.«attributes» >> Term.attrKind >> "elab_rules" >> optKind >> optional (" : " >> ident) >> optional (" <= " >> ident) >> Term.matchAlts)
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def elabArg := macroArg
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def elabTail := leading_parser atomic (" : " >> ident >> optional (" <= " >> ident)) >> darrow >> withPosition termParser
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@[builtin_command_parser] def «elab» := leading_parser suppressInsideQuot (optional docComment >> optional Term.«attributes» >> Term.attrKind >> "elab " >> optPrecedence >> optNamedName >> optNamedPrio >> many1 elabArg >> elabTail)
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end Command
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end Parser
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end Lean
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