/
xml.n
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/
xml.n
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/*
* Copyright (c) 2003-2008 The University of Wroclaw.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the University may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY ``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 UNIVERSITY 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.
*/
using System.Xml;
using System.Xml.Serialization;
using Nemerle.Compiler;
using Nemerle.Compiler.Typedtree;
using Nemerle.Collections;
using Nemerle.Utility;
namespace Nemerle.Xml.Serialization
{
[Nemerle.MacroUsage (Nemerle.MacroPhase.BeforeInheritance,
Nemerle.MacroTargets.Field,
Inherited = false, AllowMultiple = false)]
macro XmlMultidimensionalArray (t : TypeBuilder, f : ParsedField)
{
f.modifiers.custom_attrs = <[ XmlIgnore ]> :: f.modifiers.custom_attrs;
def (rank, elementType) = match (f.ty) {
| <[ array [ $(rank : int), $t] ]> => (rank, t)
| _ => Message.FatalError ("type of field `" + f.Name +
"' is not multidimensional array")
}
def fname = Macros.UseSiteSymbol (f.Name);
mutable bodySequence = [];
/** we will create general body of getter similar to:
def n = ordered.GetLength (0);
def m = ordered.GetLength (1);
def result = array (n);
for (mutable i = 0; i < n; ++i) {
result [i] = array (m);
for (mutable j = 0; j < m; ++j)
result[i][j] = ordered [i, j];
}
result
*/
/// first create variables containing lengths of dimensions */
def lengths = array (rank);
for (mutable i = 0; i < rank; ++i)
{
lengths [i] = Macros.NewSymbol ();
bodySequence = <[
def $(lengths [i] : name) = $(fname : name).GetLength ($(i : int))
]> :: bodySequence;
}
def lengthsIndex = lengths.MapToList(x => <[ $(x : name) ]>);
//// create variable containing top array with result
bodySequence = <[ def result = array ($(lengths [0] : name)) ]> :: bodySequence;
/// recursively define [for] loops iterating through nested arrays
def nest (depth, assign, indices)
{
if (depth >= rank)
<[ $assign = $(fname : name) [ ..$(indices.Rev()) ] ]>
else
{
def i = Macros.NewSymbol ();
def newAssign = <[ $assign [$(i : name)] ]>;
def newIndices = <[ $(i : name) ]> :: indices;
<[ $assign = array ($(lengths [depth - 1] : name));
for (mutable $(i : name) = 0; $(i : name) < $(lengths [depth] : name);
++ $(i : name))
$(nest (depth + 1, newAssign, newIndices))
]>
}
}
/// top loop must be explicit, because we don't have [assign] expression here
def firstAssign = <[ result [firstIdx] ]>;
def firstIndices = [ <[ firstIdx ]> ];
bodySequence = <[
for (mutable firstIdx = 0; firstIdx < $(lengths [0] : name); ++firstIdx)
$(nest (1, firstAssign, firstIndices))
]> :: bodySequence;
/// finally create returning of result
bodySequence = <[ result ]> :: bodySequence;
def getter = <[ { .. $(bodySequence.Rev()) } ]>;
/** we will create general body of setter similar to:
for (mutable i = 0; i < value.Length; ++i)
for (mutable j = 0; j < value[i].Length; ++j)
ordered [i, j] = value[i][j]
*/
/// we will use previously defined [lengths] variable as indices
/// recursively define [for] loops iterating through nested arrays
def nest (depth, val) {
if (depth >= rank)
<[ $(fname : name) [..$lengthsIndex ] = $val ]>
else {
def newVal = <[ $val [$(lengths[depth] : name)] ]>;
<[ for (mutable $(lengths[depth] : name) = 0;
$(lengths[depth] : name) < $val . Length;
++ $(lengths[depth] : name))
$(nest (depth + 1, newVal))
]>
}
}
def setter = nest (0, <[ $(Macros.UseSiteSymbol ("value") : name) ]>);
/// build property used to serialize and deserialize our field
def build_type (depth) {
| 0 => elementType
| _ => <[ array [ 1, $(build_type (depth - 1))] ]>
}
t.Define (<[ decl:
[XmlRootAttribute($(f.Name : string))]
public $(Macros.NewSymbol () : name) : $(build_type (rank)) {
get {
$getter
}
set {
$setter
}
}
]>)
}
/** Allow XML serialization of a variant.
It adds a default public ctor to variant options, prevents
_N_constant_object optimization and add appropriate XmlInclude
attributes.
*/
[Nemerle.MacroUsage (Nemerle.MacroPhase.BeforeTypedMembers,
Nemerle.MacroTargets.Class,
Inherited = false, AllowMultiple = false)]
macro XmlSerializable (par : TypeBuilder)
{
par.Define (<[ decl: private _N_dummy : int = 0; ]>);
match (par.GetTydecl ()) {
| TypeDeclaration.Variant (lst) =>
def mods = par.GetModifiers ();
foreach (ti :> TypeBuilder in lst) {
ti.Define (<[ decl: public this () { } ]>);
// prevent _N_constant_object
def expr = <[ XmlInclude (typeof ($(ti.ParsedName : name))) ]>;
mods.AddCustomAttribute (expr);
}
| _ =>
Message.Error ("the `XmlSerializable' macro can be used only on variants")
}
}
}