[WGSL] Allow default as a case selector
This CL updates the WGSL parser to parse `default` as a case selector
value.
Bug: tint:1633
Change-Id: I57661d25924e36bec5c03f96399c557fb7bbf760
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106382
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
diff --git a/src/tint/sem/switch_statement.h b/src/tint/sem/switch_statement.h
index 7028c05..929f8cf 100644
--- a/src/tint/sem/switch_statement.h
+++ b/src/tint/sem/switch_statement.h
@@ -22,10 +22,12 @@
// Forward declarations
namespace tint::ast {
class CaseStatement;
+class CaseSelector;
class SwitchStatement;
} // namespace tint::ast
namespace tint::sem {
class CaseStatement;
+class CaseSelector;
class Constant;
class Expression;
} // namespace tint::sem
@@ -83,14 +85,39 @@
const BlockStatement* Body() const { return body_; }
/// @returns the selectors for the case
- std::vector<const Constant*>& Selectors() { return selectors_; }
+ std::vector<const CaseSelector*>& Selectors() { return selectors_; }
/// @returns the selectors for the case
- const std::vector<const Constant*>& Selectors() const { return selectors_; }
+ const std::vector<const CaseSelector*>& Selectors() const { return selectors_; }
private:
const BlockStatement* body_ = nullptr;
- std::vector<const Constant*> selectors_;
+ std::vector<const CaseSelector*> selectors_;
+};
+
+/// Holds semantic information about a switch case selector
+class CaseSelector final : public Castable<CaseSelector, Node> {
+ public:
+ /// Constructor
+ /// @param decl the selector declaration
+ /// @param val the case selector value, nullptr for a default selector
+ explicit CaseSelector(const ast::CaseSelector* decl, const Constant* val = nullptr);
+
+ /// Destructor
+ ~CaseSelector() override;
+
+ /// @returns true if this is a default selector
+ bool IsDefault() const { return val_ == nullptr; }
+
+ /// @returns the case selector declaration
+ const ast::CaseSelector* Declaration() const;
+
+ /// @returns the selector constant value, or nullptr if this is the default selector
+ const Constant* Value() const { return val_; }
+
+ private:
+ const ast::CaseSelector* const decl_;
+ const Constant* const val_;
};
} // namespace tint::sem
