initial checkin of SkSL compiler

src/sksl/ast/SkSLASTFloatLiteral.h

Index: src/sksl/ast/SkSLASTFloatLiteral.h
diff --git a/src/sksl/ast/SkSLASTFloatLiteral.h b/src/sksl/ast/SkSLASTFloatLiteral.h
new file mode 100644
index 0000000000000000000000000000000000000000..89d43cc003bbc96f872dbef93ba546dfd6f0638d
--- /dev/null
+++ b/src/sksl/ast/SkSLASTFloatLiteral.h
@@ -0,0 +1,34 @@
+/*
+ * 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_ASTFLOATLITERAL
+#define SKSL_ASTFLOATLITERAL
+
+#include "SkSLASTExpression.h"
+
+namespace SkSL {
+
+/**
+ * A literal floating point number. 
+ */
+struct ASTFloatLiteral : public ASTExpression {
+    ASTFloatLiteral(Position position, double value)
+    : INHERITED(position, kFloat_Kind)
+    , fValue(value) {}
+
+    std::string description() const override {
+        return to_string(fValue);
+    }
+
+    const double fValue;
+
+    typedef ASTExpression INHERITED;
+};
+
+} // namespace
+
+#endif