package ocaml-compiler

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Official release of OCaml 5.3.0

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ocaml-5.3.0.tar.gz

sha256=22c1dd9de21bf43b62d1909041fb5fad648905227bf69550a6a6bef31e654f38

doc/compiler-libs.common/Errortrace/Subtype/index.html

Module `Errortrace.Subtype`

type 'a elt =

| Diff of 'a diff

type 'a t = 'a elt list

Just as outside Subtype, we split traces, completed traces, and complete errors. However, in a minor asymmetry, the name Subtype.error_trace corresponds to the outside error type, and Subtype.error corresponds to the outside *_error types (e.g., unification_error). This error type has the invariant that the subtype trace is nonempty; note that no such invariant is imposed on the unification trace.

type trace = Types.type_expr t

type error_trace = expanded_type t

type unification_error_trace = unification error

To avoid shadowing

type nonrec error = private {

trace : error_trace;
unification_trace : unification error;

}

val error : 
  trace:error_trace ->
  unification_trace:unification_error_trace ->
  error

val map : ('a -> 'b) -> 'a t -> 'b t