SkSL enum changes

Changed a couple of SkSL enums to enum classes and rearranged things to
make their storage within IRNode type safe.

Change-Id: I6509d027d79161c1a09473e90943aae061583f20
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324624
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/sksl/SkSLInliner.cpp b/src/sksl/SkSLInliner.cpp
index 18c3a69..f9d282a 100644
--- a/src/sksl/SkSLInliner.cpp
+++ b/src/sksl/SkSLInliner.cpp
@@ -503,7 +503,8 @@
                 auto assignment =
                         std::make_unique<ExpressionStatement>(std::make_unique<BinaryExpression>(
                                 offset,
-                                clone_with_ref_kind(*resultExpr, VariableReference::kWrite_RefKind),
+                                clone_with_ref_kind(*resultExpr,
+                                                    VariableReference::RefKind::kWrite),
                                 Token::Kind::TK_EQ,
                                 expr(r.expression()),
                                 &resultExpr->type()));
@@ -633,7 +634,7 @@
         const Variable* variableSymbol = symbolTableForCall->add(std::make_unique<Variable>(
                                                  /*offset=*/-1, fModifiers->handle(Modifiers()),
                                                  nameFrag, type, caller->isBuiltin(),
-                                                 Variable::kLocal_Storage, initialValue->get()));
+                                                 Variable::Storage::kLocal, initialValue->get()));
 
         // Prepare the variable declaration (taking extra care with `out` params to not clobber any
         // initial value).
@@ -719,7 +720,7 @@
         inlinedBody.children().push_back(
                 std::make_unique<ExpressionStatement>(std::make_unique<BinaryExpression>(
                         offset,
-                        clone_with_ref_kind(*arguments[i], VariableReference::kWrite_RefKind),
+                        clone_with_ref_kind(*arguments[i], VariableReference::RefKind::kWrite),
                         Token::Kind::TK_EQ,
                         std::move(varMap[p]),
                         &arguments[i]->type())));
@@ -727,7 +728,8 @@
 
     if (resultExpr != nullptr) {
         // Return our result variable as our replacement expression.
-        SkASSERT(resultExpr->as<VariableReference>().refKind() == VariableReference::kRead_RefKind);
+        SkASSERT(resultExpr->as<VariableReference>().refKind() ==
+                 VariableReference::RefKind::kRead);
         inlinedCall.fReplacementExpr = std::move(resultExpr);
     } else {
         // It's a void function, so it doesn't actually result in anything, but we have to return