MLKInterpreter: Implement the %LAMBDA operator.

1 files changed, 75 insertions, 0 deletions

diff --git a/MLKInterpretedClosure.m b/MLKInterpretedClosure.m
new file mode 100644
index 0000000..48f1805
--- /dev/null
+++ b/MLKInterpretedClosure.m
@@ -0,0 +1,75 @@
+/* -*- 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 "MLKCons.h"
+#import "MLKInterpretedClosure.h"
+#import "MLKInterpreter.h"
+#import "runtime-compatibility.h"
+
+#import <Foundation/NSDictionary.h>
+#import <Foundation/NSSet.h>
+
+
+@implementation MLKInterpretedClosure
+-(id) initWithBodyForm:(id)form
+        lambdaListName:(MLKSymbol *)symbol
+               context:(MLKLexicalContext *)lexctx
+           environment:(MLKLexicalEnvironment *)lexenv
+{
+  self = [super init];
+  ASSIGN (bodyForm, form);
+  ASSIGN (context, lexctx);
+  ASSIGN (environment, lexenv);
+  ASSIGN (lambdaListName, symbol);
+  return self;
+}
+
+-(NSArray *) applyToArray:(NSArray *)arguments
+{
+  id arglist = [MLKCons listWithArray:arguments];
+
+  MLKLexicalEnvironment *new_environment =
+    [MLKLexicalEnvironment environmentWithParent:environment
+                           variables:[NSDictionary dictionaryWithObject:arglist
+                                                   forKey:lambdaListName]
+                           functions:nil];
+
+  MLKLexicalContext *new_context =
+    [MLKLexicalContext contextWithParent:context
+                       variables:[NSSet setWithObject:lambdaListName]
+                       functions:nil
+                       goTags:nil
+                       macros:nil
+                       symbolMacros:nil
+                       declarations:nil];
+
+  return [MLKInterpreter eval:bodyForm
+                         inLexicalContext:new_context
+                         withEnvironment:new_environment];
+}
+
+-(NSString *) description
+{
+  return [self descriptionForLisp];
+}
+
+-(NSString *) descriptionForLisp
+{
+  return [NSString stringWithFormat:@"<Interpreted closure @%p>", self];
+}
+@end