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author | Matthias Benkard <mulk@minimulk.mst-plus> | 2008-07-27 09:44:01 +0200 |
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committer | Matthias Benkard <mulk@minimulk.mst-plus> | 2008-07-27 09:44:01 +0200 |
commit | a234e03248b1a8a97ee5f0b1d3a8f988d275cea8 (patch) | |
tree | aa7ebafc37ced87a96855b9758310dd80c84d2fc /MLKCommaReader.m | |
parent | 39c7ec616a22882c2b98244c7dcb39b6cd8ef122 (diff) | |
parent | bcde0dca1696a9f9e754d52776700edc83663453 (diff) |
Merge branch 'master' of http://matthias.benkard.de/code/mulklisp
Diffstat (limited to 'MLKCommaReader.m')
-rw-r--r-- | MLKCommaReader.m | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/MLKCommaReader.m b/MLKCommaReader.m new file mode 100644 index 0000000..3a0115b --- /dev/null +++ b/MLKCommaReader.m @@ -0,0 +1,73 @@ +/* -*- mode: objc; coding: utf-8 -*- */ +/* Étoilisp/Mulklisp, 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 "MLKStream.h" +#import "runtime-compatibility.h" +#import "util.h" + + +@implementation MLKCommaReader +-(NSArray *) applyToArray:(NSArray *)arguments +{ + MLKStream *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 |