962dec40cb
Change-Id: I026a8a6b452d4cb8adce4d5d4908aaf2e71f2555 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417516 Commit-Queue: Ethan Nicholas <ethannicholas@google.com> Reviewed-by: John Stiles <johnstiles@google.com>
92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
/*
|
|
* 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_SYMBOL
|
|
#define SKSL_SYMBOL
|
|
|
|
#include "include/private/SkSLIRNode.h"
|
|
#include "include/private/SkSLProgramElement.h"
|
|
|
|
namespace SkSL {
|
|
|
|
/**
|
|
* Represents a symboltable entry.
|
|
*/
|
|
class Symbol : public IRNode {
|
|
public:
|
|
enum class Kind {
|
|
kExternal = (int) ProgramElement::Kind::kLast + 1,
|
|
kField,
|
|
kFunctionDeclaration,
|
|
kSymbolAlias,
|
|
kType,
|
|
kUnresolvedFunction,
|
|
kVariable,
|
|
|
|
kFirst = kExternal,
|
|
kLast = kVariable
|
|
};
|
|
|
|
Symbol(int offset, Kind kind, skstd::string_view name, const Type* type = nullptr)
|
|
: INHERITED(offset, (int) kind)
|
|
, fName(name)
|
|
, fType(type) {
|
|
SkASSERT(kind >= Kind::kFirst && kind <= Kind::kLast);
|
|
}
|
|
|
|
~Symbol() override {}
|
|
|
|
const Type& type() const {
|
|
SkASSERT(fType);
|
|
return *fType;
|
|
}
|
|
|
|
Kind kind() const {
|
|
return (Kind) fKind;
|
|
}
|
|
|
|
skstd::string_view name() const {
|
|
return fName;
|
|
}
|
|
|
|
/**
|
|
* Use is<T> to check the type of a symbol.
|
|
* e.g. replace `sym.kind() == Symbol::Kind::kVariable` with `sym.is<Variable>()`.
|
|
*/
|
|
template <typename T>
|
|
bool is() const {
|
|
return this->kind() == T::kSymbolKind;
|
|
}
|
|
|
|
/**
|
|
* Use as<T> to downcast symbols. e.g. replace `(Variable&) sym` with `sym.as<Variable>()`.
|
|
*/
|
|
template <typename T>
|
|
const T& as() const {
|
|
SkASSERT(this->is<T>());
|
|
return static_cast<const T&>(*this);
|
|
}
|
|
|
|
template <typename T>
|
|
T& as() {
|
|
SkASSERT(this->is<T>());
|
|
return static_cast<T&>(*this);
|
|
}
|
|
|
|
private:
|
|
skstd::string_view fName;
|
|
const Type* fType;
|
|
|
|
using INHERITED = IRNode;
|
|
|
|
friend class Type;
|
|
};
|
|
|
|
} // namespace SkSL
|
|
|
|
#endif
|