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Pull the Ruby rules out to the top level.

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This commit is contained in:
Rob Rix 2017-04-07 14:29:48 -04:00
parent 1df2c979ec
commit cec63c69aa
1 changed files with 20 additions and 8 deletions
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28
src/Language/Ruby/Syntax.hs
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@ -35,14 +35,26 @@ data Grammar = Program | Uninterpreted | BeginBlock | EndBlock | Undef | Alias |
-- | Assignment from AST in Ruby’s grammar onto a program in Ruby’s syntax.
assignment :: Assignment Grammar (Program Syntax (Maybe a))
assignment = foldr (>>) (pure Nothing) <$ rule Program <*> children (many declaration)
where declaration = comment <|> class' <|> method
class' = wrapU <$ rule Class
<*> children (Declaration.Class <$> constant <*> pure [] <*> declaration)
constant = wrapU . Syntax.Identifier <$ rule Constant <*> content
identifier = wrapU . Syntax.Identifier <$ rule Identifier <*> content
method = wrapU <$ rule Method
<*> children (Declaration.Method <$> identifier <*> pure [] <*> statement)
statement = expr
declaration :: Assignment Grammar (Program Syntax a)
declaration = comment <|> class' <|> method
class' :: Assignment Grammar (Program Syntax a)
class' = wrapU <$ rule Class
<*> children (Declaration.Class <$> constant <*> pure [] <*> declaration)
constant :: Assignment Grammar (Program Syntax a)
constant = wrapU . Syntax.Identifier <$ rule Constant <*> content
identifier :: Assignment Grammar (Program Syntax a)
identifier = wrapU . Syntax.Identifier <$ rule Identifier <*> content
method :: Assignment Grammar (Program Syntax a)
method = wrapU <$ rule Method
<*> children (Declaration.Method <$> identifier <*> pure [] <*> statement)
statement :: Assignment Grammar (Program Syntax a)
statement = expr
comment :: Assignment Grammar (Program Syntax a)
comment = wrapU . Comment.Comment <$ rule Comment <*> content