+ | (* none *) { Ast.Env.empty }
+ | stmts INCLUDE STRING
+ {
+ let env = $1 in
+ let filename = Ast.substitute env $loc $3 in
+ let rec find_on_include_path =
+ function
+ | [] -> filename
+ | inc :: incs ->
+ let path = inc // filename in
+ if Sys.file_exists path then path
+ else find_on_include_path incs
+ in
+ let filename =
+ if Filename.is_implicit filename then
+ find_on_include_path Cmdline.includes
+ else filename in
+ let fp = open_in filename in
+ let lexbuf = Lexing.from_channel fp in
+ lexbuf.lex_curr_p <- { lexbuf.lex_curr_p with pos_fname = filename };
+ let reader =
+ match !lexer_read with None -> assert false | Some r -> r in
+ let env' = file reader lexbuf in
+ close_in fp;
+ Ast.Env.merge env env'
+ }
+ | stmts stmt { let name, expr = $2 in Ast.Env.add name expr $1 }