Move castable into utils.
The Castable class is used by utils/. This Cl moves the implementation
into the utils/ folder. The `Is` and `As` methods are added into the
`tint` namespace to make usage shorter.
Change-Id: I0decedb92ebed01b6aa12d2e3efa7190742e9a33
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/127402
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
diff --git a/src/tint/ast/compound_assignment_statement.h b/src/tint/ast/compound_assignment_statement.h
index bb1f34f..f23af15 100644
--- a/src/tint/ast/compound_assignment_statement.h
+++ b/src/tint/ast/compound_assignment_statement.h
@@ -22,7 +22,8 @@
namespace tint::ast {
/// A compound assignment statement
-class CompoundAssignmentStatement final : public Castable<CompoundAssignmentStatement, Statement> {
+class CompoundAssignmentStatement final
+ : public utils::Castable<CompoundAssignmentStatement, Statement> {
public:
/// Constructor
/// @param pid the identifier of the program that owns this node
