1 files changed, 71 insertions, 0 deletions
diff --git a/src/deps/skia/include/sksl/DSLSymbols.h b/src/deps/skia/include/sksl/DSLSymbols.h
new file mode 100644
index 000000000..9eebeda7c
--- /dev/null
+++ b/src/deps/skia/include/sksl/DSLSymbols.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SKSL_DSL_SYMBOLS
+#define SKSL_DSL_SYMBOLS
+
+#include "include/core/SkStringView.h"
+#include "include/private/SkSLString.h"
+#include "include/sksl/DSLExpression.h"
+
+#include <memory>
+
+namespace SkSL {
+
+class SymbolTable;
+
+namespace dsl {
+
+class DSLVar;
+
+// This header provides methods for manually managing symbol tables in DSL code. They should not be
+// used by normal hand-written DSL code, where we rely on C++ to manage symbols, but are instead
+// needed when DSL objects are being constructed programmatically (as in DSLParser).
+
+/**
+ * Pushes a new symbol table onto the symbol table stack.
+ */
+void PushSymbolTable();
+
+/**
+ * Pops the top symbol table from the stack. As symbol tables are shared pointers, this will only
+ * destroy the symbol table if it was never attached to anything (e.g. passed into a Block
+ * constructor).
+ */
+void PopSymbolTable();
+
+/**
+ * Returns the current symbol table. Outside of SkSL itself, this is an opaque pointer, used only
+ * for passing it to DSL methods that require it.
+ */
+std::shared_ptr<SymbolTable> CurrentSymbolTable();
+
+/**
+ * Returns an expression referring to the named symbol.
+ */
+DSLPossibleExpression Symbol(skstd::string_view name, PositionInfo pos = PositionInfo::Capture());
+
+/**
+ * Returns true if the name refers to a type (user or built-in) in the current symbol table.
+ */
+bool IsType(skstd::string_view name);
+
+/**
+ * Returns true if the name refers to a builtin type.
+ */
+bool IsBuiltinType(skstd::string_view name);
+
+/**
+ * Adds a variable to the current symbol table.
+ */
+void AddToSymbolTable(DSLVarBase& var, PositionInfo pos = PositionInfo::Capture());
+
+} // namespace dsl
+
+} // namespace SkSL
+
+#endif