[metal-writer] Add identifier expression.
This CL adds the start of identifier expressions to the Metal backend.
Identifiers with paths are currently not supported.
Bug: tint:8
Change-Id: I4df8b6a3c32251d454d3dae5fa8933dad36094f8
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/23703
Reviewed-by: David Neto <dneto@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index ad647f4..994aac7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -885,6 +885,7 @@
source_set("tint_unittests_msl_writer_src") {
sources = [
+ "src/writer/msl/generator_impl_identifier_test.cc",
"src/writer/msl/generator_impl_return_test.cc",
"src/writer/msl/generator_impl_test.cc",
"src/writer/msl/generator_impl_type_test.cc",
