47 lines
1.9 KiB
OCaml
47 lines
1.9 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(* Substitutions *)
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open Types
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type t
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(*
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Substitutions are used to translate a type from one context to
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another. This requires substituing paths for identifiers, and
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possibly also lowering the level of non-generic variables so that
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it be inferior to the maximum level of the new context.
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Substitutions can also be used to create a "clean" copy of a type.
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Indeed, non-variable node of a type are duplicated, with their
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levels set to generic level. That way, the resulting type is
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well-formed (decreasing levels), even if the original one was not.
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*)
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val identity: t
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val add_type: Ident.t -> Path.t -> t -> t
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val add_module: Ident.t -> Path.t -> t -> t
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val add_modtype: Ident.t -> module_type -> t -> t
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val type_expr: t -> type_expr -> type_expr
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val value_description: t -> value_description -> value_description
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val type_declaration: t -> type_declaration -> type_declaration
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val exception_declaration:
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t -> exception_declaration -> exception_declaration
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val class_type: t -> class_type -> class_type
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val modtype: t -> module_type -> module_type
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val signature: t -> signature -> signature
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val modtype_declaration: t -> modtype_declaration -> modtype_declaration
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