Documentation

Lean.Data.Position

structure Lean.Position :
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        structure Lean.FileMap :

        Content of a file together with precalculated positions of newlines.

        • source : String

          The content of the file.

        • positions : Array String.Pos

          The positions of newline characters. The first entry is always 0 and the last always the index of the last character. In particular, if the last character is a newline, that index will appear twice.

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          class Lean.MonadFileMap (m : TypeType) :
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            The last line should always be positions.size - 1.

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                def Lean.FileMap.getLine (fmap : FileMap) (x : Nat) :

                The line numbers associated with the positions of the FileMap. fmap.getLine i is the iᵗʰ entry of #[1, 2, …, n-1, n-1] where n is the size of positions.

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                            partial def Lean.FileMap.toPosition.loop (fmap : FileMap) (pos : String.Pos) (str : String) (ps : Array String.Pos) (b e : Nat) :

                            Convert a Lean.Position to a String.Pos.

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                                Returns the position of the start of (1-based) line line. This gives the same result as map.ofPosition ⟨line, 0⟩, but is more efficient.

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