Write out StringViewTemplate::Operator=().

Avoids some weirdness in mac toolchain with external templates
and Operator() = default; instantiation.

Change-Id: Ieec5dc08ad559752278a6f1de8fc69aad2b4e30c
Reviewed-on: https://pdfium-review.googlesource.com/30810
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/core/fxcrt/string_view_template.h b/core/fxcrt/string_view_template.h
index 05694cf244..1780e47b03 100644
--- a/core/fxcrt/string_view_template.h
+++ b/core/fxcrt/string_view_template.h
@@ -81,7 +81,10 @@ class StringViewTemplate {
     return *this;
   }
 
-  StringViewTemplate& operator=(const StringViewTemplate& src) = default;
+  StringViewTemplate& operator=(const StringViewTemplate& src) {
+    m_Span = src.m_Span;
+    return *this;
+  }
 
   const_iterator begin() const {
     return reinterpret_cast<const_iterator>(m_Span.begin());