[incubator-weex] branch master updated: [core][data_render] support class binding (#1740)

[kyork]

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The following commit(s) were added to refs/heads/master by this push:
     new 476334e  [core][data_render] support class binding (#1740)
476334e is described below

commit 476334e2678c9de74a7a6f88262043c5bc5e6b58
Author: yxping <yxp...@users.noreply.github.com>
AuthorDate: Tue Nov 13 11:01:53 2018 +0800

    [core][data_render] support class binding (#1740)
---
 weex_core/Source/core/data_render/parser.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/weex_core/Source/core/data_render/parser.cc 
b/weex_core/Source/core/data_render/parser.cc
index db3cd7d..38a1815 100644
--- a/weex_core/Source/core/data_render/parser.cc
+++ b/weex_core/Source/core/data_render/parser.cc
@@ -90,7 +90,10 @@ struct ASTParser final {
             args.push_back(
                 factory_->NewStringConstant(wrap_prefix + 
class_style.string_value()));
           } else {
-            args.push_back(ParseBindingExpression(class_style));
+            args.push_back(factory_->NewBinaryExpression(
+                BinaryOperation::kAddition,
+                factory_->NewStringConstant(wrap_prefix),
+                ParseBindingExpression(class_style)));
           }
           statement->PushExpression(factory_->NewCallExpression(func_id, 
args));
           args.pop_back();