39 lines
1014 B
Idris
39 lines
1014 B
Idris
module Quox.Syntax.Universe
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import Quox.Pretty
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import Data.Fin
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import Derive.Prelude
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%default total
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%language ElabReflection
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||| `UAny` doesn't show up in programs, but when checking something is
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||| just some type (e.g. in a signature) it's checked against `Star UAny`
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public export
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data Universe = U Nat | UAny
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%name Universe l
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%runElab derive "Universe" [Eq, Ord, Show]
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export
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PrettyHL Universe where
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prettyM UAny = pure $ hl Delim "_"
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prettyM (U l) = pure $ hl Free $ pretty l
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export
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prettyUnivSuffix : Pretty.HasEnv m => Universe -> m (Doc HL)
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prettyUnivSuffix UAny = ifUnicode "_" "₋"
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prettyUnivSuffix (U l) =
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ifUnicode (pretty $ pack $ map sub $ unpack $ show l) (pretty l)
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where
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sub : Char -> Char
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sub c = case c of
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'0' => '₀'; '1' => '₁'; '2' => '₂'; '3' => '₃'; '4' => '₄'
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'5' => '₅'; '6' => '₆'; '7' => '₇'; '8' => '₈'; '9' => '₉'; _ => c
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export %inline
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fromInteger : (x : Integer) -> (0 _ : So (x >= 0)) => Universe
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fromInteger x = U $ fromInteger x
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