support tagged template literals - closes #16

lib/6to5/transformers/template-literals.js

@@ -5,6 +5,22 @@ var buildBinaryExpression = function (left, right) {
   return b.binaryExpression("+", left, right);
 };
 
+exports.TaggedTemplateExpression = function (node) {
+  var args = [];
+  var quasi = node.quasi;
+
+  var strings = quasi.quasis.map(function (elem) {
+    return b.literal(elem.value.raw);
+  });
+  args.push(b.arrayExpression(strings));
+
+  _.each(quasi.expressions, function (expr) {
+    args.push(expr);
+  });
+
+  return b.callExpression(node.tag, args);
+};
+
 exports.TemplateLiteral = function (node) {
   var nodes = [];
 

test/fixtures/template-literals/tag/actual.js

@@ -0,0 +1 @@
+var foo = bar`a${ 42 }b ${_.foobar()}`;

test/fixtures/template-literals/tag/expected.js

@@ -0,0 +1 @@
+var foo = bar(["a", "b ", ""], 42, _.foobar());