view src/fuse.sml @ 1739:c414850f206f

Add support for -boot flag, which allows in-tree execution of Ur/Web The boot flag rewrites most hardcoded paths to point to the build directory, and also forces static compilation. This is convenient for developing Ur/Web, or if you cannot 'sudo make install' Ur/Web. The following changes were made: * Header files were moved to include/urweb instead of include; this lets FFI users point their C_INCLUDE_PATH at this directory at write <urweb/urweb.h>. For internal Ur/Web executables, we simply pass -I$PATH/include/urweb as normal. * Differentiate between LIB and SRCLIB; SRCLIB is Ur and JavaScript source files, while LIB is compiled products from libtool. For in-tree compilation these live in different places. * No longer reference Config for paths; instead use Settings; these settings can be changed dynamically by Compiler.enableBoot () (TODO: add a disableBoot function.) * config.h is now generated directly in include/urweb/config.h, for consistency's sake (especially since it gets installed along with the rest of the headers!) * All of the autotools build products got updated. * The linkStatic field in protocols now only contains the name of the build product, and not the absolute path. Future users have to be careful not to reference the Settings files to early, lest they get an old version (this was the source of two bugs during development of this patch.)
author Edward Z. Yang <ezyang@mit.edu>
date Wed, 02 May 2012 17:17:57 -0400
parents 9304474170ed
children c1e3805e604e
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(* Copyright (c) 2008, Adam Chlipala
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - The names of contributors may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *)

structure Fuse :> FUSE = struct

open Mono
structure U = MonoUtil

structure IM = IntBinaryMap

fun returnsString (t, loc) =
    let
        fun rs (t, loc) =
            case t of
                TFfi ("Basis", "string") => SOME ([], (TRecord [], loc))
              | TFun (dom, ran) =>
                (case rs ran of
                     NONE => NONE
                   | SOME (args, ran') => SOME (dom :: args, (TFun (dom, ran'), loc)))
              | _ => NONE
    in
        case t of
            TFun (dom, ran) =>
            (case rs ran of
                 NONE => NONE
               | SOME (args, ran') => SOME (dom :: args, (TFun (dom, ran'), loc)))
          | _ => NONE
    end

fun fuse file =
    let
        fun doDecl (d as (_, loc), (funcs, maxName)) =
            let
                exception GetBody

                fun doVi ((x, n, t, e, s), funcs, maxName) =
                    case returnsString t of
                        NONE => (NONE, funcs, maxName)
                      | SOME (args, t') =>
                        let
                            fun getBody (e, args) =
                                case (#1 e, args) of
                                    (_, []) => (e, [])
                                  | (EAbs (x, t, _, e), _ :: args) =>
                                    let
                                        val (body, args') = getBody (e, args)
                                    in
                                        (body, (x, t) :: args')
                                    end
                                  | _ => raise GetBody

                            val (body, args) = getBody (e, args)
                            val body = MonoOpt.optExp (EWrite body, loc)
                            val (body, _) = foldr (fn ((x, dom), (body, ran)) =>
                                                      ((EAbs (x, dom, ran, body), loc),
                                                       (TFun (dom, ran), loc)))
                                                  (body, (TRecord [], loc)) args
                        in
                            (SOME (x, maxName, t', body, s),
                             IM.insert (funcs, n, maxName),
                             maxName + 1)
                        end
                        handle GetBody => (NONE, funcs, maxName)

                val (d, funcs, maxName) =
                    case #1 d of
                        DVal vi =>
                        let
                            val (vi', funcs, maxName) = doVi (vi, funcs, maxName)
                        in
                            (case vi' of
                                 NONE => d
                               | SOME vi' => (DValRec [vi, vi'], loc),
                             funcs, maxName)
                        end
                      | DValRec vis =>
                        let
                            val (vis', funcs, maxName) =
                                foldl (fn (vi, (vis', funcs, maxName)) =>
                                          let
                                              val (vi', funcs, maxName) = doVi (vi, funcs, maxName)
                                          in
                                              (case vi' of
                                                   NONE => vis'
                                                 | SOME vi' => vi' :: vis',
                                               funcs, maxName)
                                          end)
                                ([], funcs, maxName) vis
                        in
                            ((DValRec (vis @ vis'), loc), funcs, maxName)
                        end
                      | _ => (d, funcs, maxName)

                fun exp e =
                    case e of
                        EWrite e' =>
                        let
                            fun unravel (e, loc) =
                                case e of
                                    ENamed n =>
                                    (case IM.find (funcs, n) of
                                         NONE => NONE
                                       | SOME n' => SOME (ENamed n', loc))
                                  | EApp (e1, e2) =>
                                    (case unravel e1 of
                                         NONE => NONE
                                       | SOME e1 => SOME (EApp (e1, e2), loc))
                                  | _ => NONE
                        in
                            case unravel e' of
                                NONE => e
                              | SOME (e', _) => e'
                        end
                      | _ => e
            in
                (U.Decl.map {typ = fn x => x,
                             exp = exp,
                             decl = fn x => x} 
                            d,
                 (funcs, maxName))
            end

        val (file, _) = ListUtil.foldlMap doDecl (IM.empty, U.File.maxName file + 1) file
    in
        file
    end

end