package merlin-lib

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Merlin's libraries

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dune-project
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github.com Readme Changelog Edit opam file Versions (12)

Authors

  1. T
    The Merlin team

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  1. D
    defree@gmail.com

Sources

merlin-4.18-414.tbz
sha256=f6d6f7a266141e358c1a869612c8135c859185d547ea3ba5c9ad7bb67fe30cc1
sha512=4f272bdb028fd984fef406f7e1eadd0a3ab99d94016316f1b842782b1d1bba2bd50dcf3b4021c2096c6d9b5e5f9f6bae61bedcfd9f933f15c190e01777ef83a9

doc/merlin-lib.ocaml_utils/Ocaml_utils/Diffing_with_keys/index.html

Module Ocaml_utils.Diffing_with_keysSource

When diffing lists where each element has a distinct key, we can refine the diffing patch by introducing two composite edit moves: swaps and moves.

Swaps exchange the position of two elements. Swap cost is set to 2 * change - epsilon. Moves change the position of one element. Move cost is set to delete + addition - epsilon.

When the cost delete + addition is greater than change and with those specific weights, the optimal patch with Swaps and Moves can be computed directly and cheaply from the original optimal patch.

Sourcetype 'a with_pos = {
  1. pos : int;
  2. data : 'a;
}
Sourceval with_pos : 'a list -> 'a with_pos list
Sourcetype ('l, 'r, 'diff) mismatch =
  1. | Name of {
    1. pos : int;
    2. got : string;
    3. expected : string;
    4. types_match : bool;
    }
  2. | Type of {
    1. pos : int;
    2. got : 'l;
    3. expected : 'r;
    4. reason : 'diff;
    }
Sourcetype ('l, 'r, 'diff) change =
  1. | Change of ('l, 'r, 'diff) mismatch
  2. | Swap of {
    1. pos : int * int;
    2. first : string;
    3. last : string;
    }
  3. | Move of {
    1. name : string;
    2. got : int;
    3. expected : int;
    }
  4. | Insert of {
    1. pos : int;
    2. insert : 'r;
    }
  5. | Delete of {
    1. pos : int;
    2. delete : 'l;
    }

This specialized version of changes introduces two composite changes: Move and Swap

Sourceval prefix : Format.formatter -> ('l, 'r, 'diff) change -> unit
Sourcemodule Define (D : Diffing.Defs with type eq := unit) : sig ... end