initial commit of most and last

1 files changed, 28 insertions, 0 deletions

diff --git a/compiler.d b/compiler.d
index 0c90a45..6756882 100644
--- a/compiler.d
+++ b/compiler.d
@@ -603,6 +603,17 @@ class Compiler {
         this.func.chunk.writeOp(OpCode.OP_FIRST, args[0].line);
     }
 
+    void compileLast(Form[] args) {
+        // TODO how do we identify/propagate errors?
+        if (args.length != 1) {
+            this.error("'last': expected [1] argument, received ?", -1);
+            return;
+        }
+        ValueType vt = this.resolve(args[0], ValueType.SEQ); // TODO need a new type
+        this.func.chunk.writeOp(OpCode.OP_TYPE_CHECK_SEQ, args[0].line);
+        this.func.chunk.writeOp(OpCode.OP_LAST, args[0].line);
+    }
+
     void compileIn(Form[] args) {
         // TODO how do we identify/propagate errors?
         if (args.length != 2) {
@@ -628,6 +639,17 @@ class Compiler {
         this.func.chunk.writeOp(OpCode.OP_LENGTH, args[0].line);
     }
 
+    void compileMost(Form[] args) {
+        // TODO how do we identify/propagate errors?
+        if (args.length != 1) {
+            this.error("'most': expected [1] argument, received ?", -1);
+            return;
+        }
+        ValueType vt = this.resolve(args[0], ValueType.OBJ); // TODO need a new type
+        this.func.chunk.writeOp(OpCode.OP_TYPE_CHECK_SEQ, args[0].line);
+        this.func.chunk.writeOp(OpCode.OP_MOST, args[0].line);
+    }
+
     void compileRest(Form[] args) {
         // TODO how do we identify/propagate errors?
         if (args.length != 1) {
@@ -806,12 +828,18 @@ class Compiler {
             case "in?":
                 this.compileIn(cons.tail);
                 break;
+            case "last":
+                this.compileLast(cons.tail);
+                break;
             case "length":
                 this.compileLength(cons.tail);
                 break;
             case "list":
                 this.compileList(cons.tail);
                 break;
+            case "most":
+                this.compileMost(cons.tail);
+                break;
             case "rest":
                 this.compileRest(cons.tail);
                 break;