Pass the raw use-macro attribute text.

lib/python/TAL/TALGenerator.py

@@ -258,7 +258,7 @@ class TALGenerator:
     def emitUseMacro(self, expr):
         cexpr = self.compileExpression(expr)
         program = self.popProgram()
-        self.emit("useMacro", cexpr, self.popSlots(), program)
+        self.emit("useMacro", expr, cexpr, self.popSlots(), program)
 
     def emitDefineSlot(self, slotName):
         program = self.popProgram()

lib/python/TAL/TALInterpreter.py

@@ -277,11 +277,11 @@ class TALInterpreter:
     def do_defineMacro(self, macroName, macro):
         self.interpret(macro)
 
-    def do_useMacro(self, macroName, compiledSlots, block):
+    def do_useMacro(self, macroName, macroExpr, compiledSlots, block):
         if not self.metal:
             self.interpret(block)
             return
-        macro = self.engine.evaluateMacro(macroName)
+        macro = self.engine.evaluateMacro(macroExpr)
         save = self.slots, self.currentMacro
         self.slots = compiledSlots
         self.currentMacro = macroName