885c1d3048
It was decided that being able to report positions from C++ code is not worth the cost of having all of these captures everywhere. Change-Id: I94981d9f780bd95df8b56198210c9cdd5f16239c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528366 Reviewed-by: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
/*
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* Copyright 2021 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SKSL_DSL_SYMBOLS
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#define SKSL_DSL_SYMBOLS
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#include "include/sksl/DSLExpression.h"
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#include <memory>
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#include <string_view>
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namespace SkSL {
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class Position;
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class SymbolTable;
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namespace dsl {
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class DSLVarBase;
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// This header provides methods for manually managing symbol tables in DSL code. They should not be
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// used by normal hand-written DSL code, where we rely on C++ to manage symbols, but are instead
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// needed when DSL objects are being constructed programmatically (as in DSLParser).
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/**
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* Pushes a new symbol table onto the symbol table stack.
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*/
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void PushSymbolTable();
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/**
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* Pops the top symbol table from the stack. As symbol tables are shared pointers, this will only
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* destroy the symbol table if it was never attached to anything (e.g. passed into a Block
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* constructor).
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*/
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void PopSymbolTable();
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/**
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* Returns the current symbol table. Outside of SkSL itself, this is an opaque pointer, used only
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* for passing it to DSL methods that require it.
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*/
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std::shared_ptr<SymbolTable> CurrentSymbolTable();
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/**
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* Returns an expression referring to the named symbol.
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*/
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DSLExpression Symbol(std::string_view name, Position pos = {});
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/**
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* Returns true if the name refers to a type (user or built-in) in the current symbol table.
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*/
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bool IsType(std::string_view name);
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/**
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* Returns true if the name refers to a builtin type.
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*/
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bool IsBuiltinType(std::string_view name);
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/**
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* Adds a variable to the current symbol table.
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*/
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void AddToSymbolTable(DSLVarBase& var, Position pos = {});
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} // namespace dsl
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} // namespace SkSL
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#endif
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