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(*
Copyright © 2011 MLstate

This file is part of OPA.

OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.

OPA 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 Affero General Public License for
more details.

You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*)

(**
Fun action resolution : Insertion of environment serialization.

@author Rudy Sicard
@author Mathieu Barbin
*)

(**
This module implements part of the funactions resolution for opa.
This is the step 2), taking place :
+ after Typing and Slicing
+ before Explicit instantation.


This pass insert in the code generating the xhml sent to clients containing fun actions
the serialization of the environment of the fun action, corresponding to the argument
already applied.

Initial expressions
{[
< onclick=\{EXPR = \@funaction(e)\}>
]}

After [FunActionLifting]
{[
f(arg1,arg2,...)=e
< onclick=\{EXPR = \@funaction( f(arg1,arg2,...) ) \}>
]}

Then, [typing, slicing].

After [FunActionEnvSerialize]
{[
f(arg1,arg2,...)=e
< onclick=\{EXPR = \@funaction(
arg1_ = FunActionServer_serialize_argument(arg1)
arg2_ = FunActionServer_serialize_argument(arg2)
...
(\@funaction[client_id](f))(
\@funaction[Deserialize](arg1_),
\@funaction[Deserialize](arg2_),
...
)
)
\} >
]}

The pass is after typing, and should preserve types.

Types of directive:
+ {[\@funaction('a) : 'a]}
+ {[\@funaction[Deserialized]({arg : 'a ; serialized_arg : string}) : 'a]}
+ {[\@funaction[cliend_id]('a) : 'a]}

So, essentially, the kernel of this pass is the following, applied only
on the server side code :

From all directives :
{[
\@funaction( f(arg1,arg2,...) )
]}

To
{[
\@funaction(
arg1_ = FunActionServer_serialize_argument(arg1)
arg2_ = FunActionServer_serialize_argument(arg2)
...
(\@funaction[client_id](f))(
\@funaction[Deserialize](arg1_),
\@funaction[Deserialize](arg2_),
...
)
)
]}

*)

val process_server_code:
  stdlib_gamma:QmlTypes.gamma ->
  QmlTypes.gamma ->
  QmlAst.annotmap ->
  QmlAst.code ->
  (QmlTypes.gamma * QmlAst.annotmap) * QmlAst.code
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