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proof(idris2): tighten Ephapax.Parse.Stream to %default total #90

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Merged
hyperpolymath merged 1 commit into from
May 20, 2026
Merged

proof(idris2): tighten Ephapax.Parse.Stream to %default total #90

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11 changes: 6 additions & 5 deletions idris2/src/Ephapax/Parse/Stream.idr
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ module Ephapax.Parse.Stream
import Ephapax.Parse.Lexer
import Ephapax.Parse.ZigBuffer

%default partial
%default total

public export
record Stream where
Expand Down Expand Up @@ -45,12 +45,13 @@ atEnd s = s.index >= s.len

public export
remaining : Stream -> List Token
remaining s = build s.index
remaining s = buildFuel (integerToNat (cast (s.len - s.index))) s.index
where
build : Int -> List Token
build i =
buildFuel : Nat -> Int -> List Token
buildFuel Z _ = []
buildFuel (S k) i =
if i >= s.len then []
else MkToken (getTokKind s.buf i) (getTokPos s.buf i) :: build (i + 1)
else MkToken (getTokKind s.buf i) (getTokPos s.buf i) :: buildFuel k (i + 1)

public export
at : Int -> Stream -> Maybe Token
Expand Down
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