Updated with latest merged version from emscripten github repo

Author: jrouwe

tools/webidl_binder.py

@@ -614,10 +614,15 @@ def make_call_args(i):
         # this function comes from an ancestor class; for operators, we must cast it
         cast_self = 'dynamic_cast<' + type_to_c(func_scope) + '>(' + cast_self + ')'
       maybe_deref = deref_if_nonpointer(raw[0])
-      if operator == '[]':
+      operator = operator.strip()
+      if operator in ["+", "-", "*", "/", "%", "^", "&", "|", "=",
+                      "<", ">", "+=", "-=", "*=", "/=", "%=", "^=", "&=", "|=", "<<", ">>", ">>=",
+                      "<<=", "==", "!=", "<=", ">=", "<=>", "&&", "||"]:
+        call = '(*%s %s %s%s)' % (cast_self, operator, maybe_deref, args[0])
+      elif operator == '[]':
         call = '((*%s)[%s%s])' % (cast_self, maybe_deref, args[0])
       else:
-        call = '(*%s %s %s%s)' % (cast_self, operator, maybe_deref, args[0])
+        raise Exception('unfamiliar operator ' + operator)
 
     pre = ''
 
@@ -627,6 +632,7 @@ def make_call_args(i):
     if non_pointer:
       return_prefix += '&'
     if copy:
+      # Avoid sharing this static temp var between threads, which could race.
       pre += '  static thread_local %s temp;\n' % type_to_c(return_type, non_pointing=True)
       return_prefix += '(temp = '
       return_postfix += ', &temp)'