From 527af3b69f3809b054f72f1f34d2aa9516efdfb6 Mon Sep 17 00:00:00 2001
From: Tom <tom@tom-desktop.(none)>
Date: Sun, 25 Jul 2010 00:49:15 +0200
Subject: [PATCH] simplfy generated code for static ranges

---
 lib/nodes.js     | 19 ++++++++++++++++---
 src/nodes.coffee |  8 ++++++--
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/lib/nodes.js b/lib/nodes.js
index 203f7793..1d5730f7 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -618,7 +618,7 @@
       return from <= to ? ("" + idx + " = " + from + "; " + idx + " <" + this.equals + " " + to + "; " + (step || ("" + idx + "++"))) : ("" + idx + " = " + from + "; " + idx + " >" + this.equals + " " + to + "; " + (step || ("" + idx + "--")));
     };
     RangeNode.prototype.compileArray = function(o) {
-      var body, clause, i, idt, post, pre, result, vars;
+      var _b, _c, _d, _e, body, clause, i, idt, post, pre, range, result, vars;
       idt = this.idt(1);
       vars = this.compileVariables(merge(o, {
         indent: idt
@@ -627,8 +627,21 @@
       i = o.scope.freeVariable();
       pre = ("\n" + (idt) + (result) + " = []; " + (vars));
       if (this.fromNum && this.toNum) {
-        o.index = i;
-        body = this.compileSimple(o);
+        if (Math.abs(+this.fromNum - +this.toNum) >= 20) {
+          o.index = i;
+          body = this.compileSimple(o);
+        } else {
+          range = this.exclusive ? (function() {
+            _b = [];
+            for (var _c = +this.fromNum; +this.fromNum <= +this.toNum ? _c < +this.toNum : _c > +this.toNum; +this.fromNum <= +this.toNum ? _c += 1 : _c -= 1){ _b.push(_c) };
+            return _b;
+          }).call(this) : (function() {
+            _d = [];
+            for (var _e = +this.fromNum; +this.fromNum <= +this.toNum ? _e <= +this.toNum : _e >= +this.toNum; +this.fromNum <= +this.toNum ? _e += 1 : _e -= 1){ _d.push(_e) };
+            return _d;
+          }).call(this);
+          return ("[" + (range.join(', ')) + "]");
+        }
       } else {
         clause = ("" + this.fromVar + " <= " + this.toVar + " ?");
         body = ("var " + i + " = " + this.fromVar + "; " + clause + " " + i + " <" + this.equals + " " + this.toVar + " : " + i + " >" + this.equals + " " + this.toVar + "; " + clause + " " + i + " += 1 : " + i + " -= 1");
diff --git a/src/nodes.coffee b/src/nodes.coffee
index 1fbc808c..3d087ae5 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -578,8 +578,12 @@ exports.RangeNode: class RangeNode extends BaseNode
     i:      o.scope.freeVariable()
     pre:    "\n${idt}${result} = []; ${vars}"
     if @fromNum and @toNum
-      o.index: i
-      body: @compileSimple o
+      if Math.abs(+@fromNum - +@toNum) >= 20
+        o.index: i
+        body: @compileSimple o
+      else
+        range: if @exclusive then [+@fromNum...+@toNum] else [+@fromNum..+@toNum]
+        return "[${range.join(', ')}]"
     else
       clause: "$@fromVar <= $@toVar ?"
       body:   "var $i = $@fromVar; $clause $i <$@equals $@toVar : $i >$@equals $@toVar; $clause $i += 1 : $i -= 1"