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/* -*- mode: objc; coding: utf-8 -*- */
/* Toilet Lisp, a Common Lisp subset for the Étoilé runtime.
* Copyright (C) 2008 Matthias Andreas Benkard.
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import "MLKCommaReader.h"
#import "MLKCons.h"
#import "MLKDynamicContext.h"
#import "MLKReader.h"
#import "MLKReadtable.h"
#import "MLKPackage.h"
#import "MLKCharacterStream.h"
#import "runtime-compatibility.h"
#import "util.h"
@implementation MLKCommaReader
-(NSArray *) applyToArray:(NSArray *)arguments
{
MLKCharacterStream *stream;
MLKReadtable *readtable;
MLKPackage *cl, *sys;
MLKSymbol *marker;
unichar ch;
id quoted_form;
cl = [MLKPackage findPackage:@"COMMON-LISP"];
sys = [MLKPackage findPackage:@"TOILET-SYSTEM"];
stream = [arguments objectAtIndex:0];
readtable = [[MLKDynamicContext currentContext]
valueForSymbol:[cl intern:@"*READTABLE*"]];
if ((ch = [stream readChar]) == '@')
{
marker = [sys intern:@"UNQUOTE-SPLICING"];
}
else
{
marker = [sys intern:@"UNQUOTE"];
[stream unreadChar:ch];
}
while ([readtable isWhitespaceCharacter:(ch = [stream readChar])]);
[stream unreadChar:ch];
quoted_form = [MLKReader readFromStream:stream
eofError:YES
eofValue:nil
recursive:YES
preserveWhitespace:NO];
return [NSArray arrayWithObject:
[MLKCons cons:marker
with:[MLKCons cons:nullify(quoted_form)
with:nil]]];
}
@end
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