f5853ff652
This reverts commit 84d6cf9b5b.
Reason for revert: Blocking Chrome roll
Original change's description:
> Removed SkSL SymbolTable aliases
>
> Now that we have first class Type aliases, we no longer need this
> obsolete SymbolTable mechanism.
>
> Change-Id: Ibfb21ed153d1cbca59679659254e4d58d18f5c7c
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/491441
> Reviewed-by: John Stiles <johnstiles@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Change-Id: Ie4aadf49d83af2ad4a4e09061e92d27a4610d8fe
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/491696
Auto-Submit: Robert Phillips <robertphillips@google.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
/*
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* Copyright 2016 Google Inc.
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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_SYMBOL
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#define SKSL_SYMBOL
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#include "include/private/SkSLIRNode.h"
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#include "include/private/SkSLProgramElement.h"
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namespace SkSL {
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/**
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* Represents a symboltable entry.
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*/
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class Symbol : public IRNode {
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public:
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enum class Kind {
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kExternal = (int) ProgramElement::Kind::kLast + 1,
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kField,
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kFunctionDeclaration,
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kSymbolAlias,
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kType,
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kUnresolvedFunction,
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kVariable,
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kFirst = kExternal,
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kLast = kVariable
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};
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Symbol(int offset, Kind kind, skstd::string_view name, const Type* type = nullptr)
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: INHERITED(offset, (int) kind)
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, fName(name)
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, fType(type) {
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SkASSERT(kind >= Kind::kFirst && kind <= Kind::kLast);
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}
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~Symbol() override {}
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const Type& type() const {
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SkASSERT(fType);
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return *fType;
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}
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Kind kind() const {
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return (Kind) fKind;
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}
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skstd::string_view name() const {
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return fName;
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}
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/**
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* Use is<T> to check the type of a symbol.
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* e.g. replace `sym.kind() == Symbol::Kind::kVariable` with `sym.is<Variable>()`.
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*/
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template <typename T>
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bool is() const {
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return this->kind() == T::kSymbolKind;
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}
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/**
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* Use as<T> to downcast symbols. e.g. replace `(Variable&) sym` with `sym.as<Variable>()`.
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*/
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template <typename T>
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const T& as() const {
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SkASSERT(this->is<T>());
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return static_cast<const T&>(*this);
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}
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template <typename T>
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T& as() {
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SkASSERT(this->is<T>());
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return static_cast<T&>(*this);
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}
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private:
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skstd::string_view fName;
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const Type* fType;
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using INHERITED = IRNode;
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friend class Type;
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};
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} // namespace SkSL
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#endif
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