initial checkin of SkSL compiler

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1984363002
CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot,Build-Mac-Clang-x86_64-Release-CMake-Trybot

Review-Url: https://codereview.chromium.org/1984363002

1 files changed, 41 insertions, 0 deletions

diff --git a/src/sksl/ast/SkSLASTTernaryExpression.h b/src/sksl/ast/SkSLASTTernaryExpression.h
new file mode 100644
index 0000000000..20b827a049
--- /dev/null
+++ b/src/sksl/ast/SkSLASTTernaryExpression.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+ 
+#ifndef SKSL_ASTTERNARYEXPRESSION
+#define SKSL_ASTTERNARYEXPRESSION
+
+#include "SkSLASTExpression.h"
+
+namespace SkSL {
+
+/**
+ * A ternary expression (test ? ifTrue : ifFalse).
+ */
+struct ASTTernaryExpression : public ASTExpression {
+    ASTTernaryExpression(std::unique_ptr<ASTExpression> test,
+                         std::unique_ptr<ASTExpression> ifTrue,
+                         std::unique_ptr<ASTExpression> ifFalse)
+    : INHERITED(test->fPosition, kTernary_Kind)
+    , fTest(std::move(test))
+    , fIfTrue(std::move(ifTrue))
+    , fIfFalse(std::move(ifFalse)) {}
+
+    std::string description() const override {
+        return "(" + fTest->description() + " ? " + fIfTrue->description() + " : " +
+               fIfFalse->description() + ")";        
+    }
+
+    const std::unique_ptr<ASTExpression> fTest;
+    const std::unique_ptr<ASTExpression> fIfTrue;
+    const std::unique_ptr<ASTExpression> fIfFalse;
+
+    typedef ASTExpression INHERITED;
+};
+
+} // namespace
+
+#endif