Parser: add 'hack' to properly take care of non-literal BODY[*]

lib/Parser.js

@@ -579,7 +579,7 @@ function parseEnvelopeAddresses(list) {
 
 function parseExpr(o, literals, result, start, useBrackets) {
   start = start || 0;
-  var inQuote = false, lastPos = start - 1, isTop = false, val;
+  var inQuote = false, lastPos = start - 1, isTop = false, val, isBody = false;
 
   if (useBrackets === undefined)
     useBrackets = true;
@@ -591,7 +591,14 @@ function parseExpr(o, literals, result, start, useBrackets) {
   }
   for (var i = start, len = o.str.length; i < len; ++i) {
     if (!inQuote) {
-      if (o.str[i] === '"')
+      if (isBody) {
+        if (o.str[i] === ']') {
+          val = convStr(o.str.substring(lastPos + 1, i + 1), literals);
+          result.push(val);
+          lastPos = i;
+          isBody = false;
+        }
+      } else if (o.str[i] === '"')
         inQuote = true;
       else if (o.str[i] === ' ' || o.str[i] === ')'
                || (useBrackets && o.str[i] === ']')) {
@@ -603,10 +610,17 @@ function parseExpr(o, literals, result, start, useBrackets) {
           return i;
         lastPos = i;
       } else if ((o.str[i] === '(' || (useBrackets && o.str[i] === '['))) {
-        var innerResult = [];
-        i = parseExpr(o, literals, innerResult, i + 1, useBrackets);
-        lastPos = i;
-        result.push(innerResult);
+        if (o.str[i] === '['
+            && i - 4 >= start
+            && o.str.substring(i - 4, i).toUpperCase() === 'BODY') {
+          isBody = true;
+          lastPos = i - 5;
+        } else {
+          var innerResult = [];
+          i = parseExpr(o, literals, innerResult, i + 1, useBrackets);
+          lastPos = i;
+          result.push(innerResult);
+        }
       }
     } else if (o.str[i] === '"' &&
                (o.str[i - 1] &&