[amberscript] Buffer parsering updates. (#244)

This CL updates the AmberScript parser to handle the changes to the
BUFFER syntax.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/buffer.cc b/src/buffer.cc
index e4736da..eeabf76 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -16,6 +16,8 @@
 
 namespace amber {
 
+Buffer::Buffer() = default;
+
 Buffer::Buffer(BufferType type) : buffer_type_(type) {}
 
 Buffer::~Buffer() = default;
@@ -28,10 +30,14 @@ FormatBuffer* Buffer::AsFormatBuffer() {
   return static_cast<FormatBuffer*>(this);
 }
 
+DataBuffer::DataBuffer() = default;
+
 DataBuffer::DataBuffer(BufferType type) : Buffer(type) {}
 
 DataBuffer::~DataBuffer() = default;
 
+FormatBuffer::FormatBuffer() = default;
+
 FormatBuffer::FormatBuffer(BufferType type) : Buffer(type) {}
 
 FormatBuffer::~FormatBuffer() = default;