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diff --git a/src/emacs-module.h.in b/src/emacs-module.h.in
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+/* emacs-module.h - GNU Emacs module API.
+
+Copyright (C) 2015-2017 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef EMACS_MODULE_H
+#define EMACS_MODULE_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
+#if defined __cplusplus && __cplusplus >= 201103L
+# define EMACS_NOEXCEPT noexcept
+#else
+# define EMACS_NOEXCEPT
+#endif
+
+#ifdef __has_attribute
+#if __has_attribute(__nonnull__)
+# define EMACS_ATTRIBUTE_NONNULL(...) __attribute__((__nonnull__(__VA_ARGS__)))
+#endif
+#endif
+#ifndef EMACS_ATTRIBUTE_NONNULL
+# define EMACS_ATTRIBUTE_NONNULL(...)
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Current environment.  */
+typedef struct emacs_env_26 emacs_env;
+
+/* Opaque pointer representing an Emacs Lisp value.
+   BEWARE: Do not assume NULL is a valid value!  */
+typedef struct emacs_value_tag *emacs_value;
+
+enum { emacs_variadic_function = -2 };
+
+/* Struct passed to a module init function (emacs_module_init).  */
+struct emacs_runtime
+{
+  /* Structure size (for version checking).  */
+  ptrdiff_t size;
+
+  /* Private data; users should not touch this.  */
+  struct emacs_runtime_private *private_members;
+
+  /* Return an environment pointer.  */
+  emacs_env *(*get_environment) (struct emacs_runtime *ert)
+    EMACS_ATTRIBUTE_NONNULL(1);
+};
+
+
+/* Possible Emacs function call outcomes.  */
+enum emacs_funcall_exit
+{
+  /* Function has returned normally.  */
+  emacs_funcall_exit_return = 0,
+
+  /* Function has signaled an error using `signal'.  */
+  emacs_funcall_exit_signal = 1,
+
+  /* Function has exit using `throw'.  */
+  emacs_funcall_exit_throw = 2,
+};
+
+struct emacs_env_25
+{
+@module_env_snippet_25@
+};
+
+struct emacs_env_26
+{
+@module_env_snippet_25@
+
+@module_env_snippet_26@
+};
+
+/* Every module should define a function as follows.  */
+extern int emacs_module_init (struct emacs_runtime *ert)
+  EMACS_ATTRIBUTE_NONNULL(1);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EMACS_MODULE_H */