91e4c7847e
We no longer support compiling in C++14, so we don't need these workarounds anymore. Change-Id: Idec5a90e98c242928182f4b32dd47459be8ca47f Reviewed-on: https://skia-review.googlesource.com/c/skia/+/541075 Reviewed-by: Arman Uguray <armansito@google.com> Auto-Submit: John Stiles <johnstiles@google.com> Commit-Queue: Arman Uguray <armansito@google.com>
119 lines
3.7 KiB
C++
119 lines
3.7 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_FUNCTION
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#define SKSL_DSL_FUNCTION
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#include "include/private/SkSLDefines.h"
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#include "include/private/SkTArray.h"
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#include "include/sksl/DSLBlock.h"
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#include "include/sksl/DSLExpression.h"
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#include "include/sksl/DSLModifiers.h"
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#include "include/sksl/DSLStatement.h"
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#include "include/sksl/DSLVar.h"
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#include "include/sksl/SkSLPosition.h"
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#include <string_view>
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#include <utility>
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namespace SkSL {
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class FunctionDeclaration;
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namespace dsl {
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class DSLType;
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template <typename T> class DSLWrapper;
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class DSLFunction {
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public:
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template<class... Parameters>
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DSLFunction(const DSLType& returnType, std::string_view name, Parameters&... parameters)
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: DSLFunction(DSLModifiers(), returnType, name, parameters...) {}
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template<class... Parameters>
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DSLFunction(const DSLModifiers& modifiers, const DSLType& returnType, std::string_view name,
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Parameters&... parameters) {
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SkTArray<DSLParameter*> parameterArray;
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parameterArray.reserve_back(sizeof...(parameters));
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(parameterArray.push_back(¶meters), ...);
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// We can't have a default parameter and a template parameter pack at the same time, so
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// unfortunately we can't capture position from this overload.
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this->init(modifiers, returnType, name, std::move(parameterArray), Position());
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}
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DSLFunction(const DSLType& returnType, std::string_view name,
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SkTArray<DSLParameter*> parameters, Position pos = {}) {
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this->init(DSLModifiers(), returnType, name, std::move(parameters), pos);
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}
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DSLFunction(const DSLModifiers& modifiers, const DSLType& returnType, std::string_view name,
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SkTArray<DSLParameter*> parameters, Position pos = {}) {
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this->init(modifiers, returnType, name, std::move(parameters), pos);
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}
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DSLFunction(const SkSL::FunctionDeclaration* decl)
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: fDecl(decl) {}
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virtual ~DSLFunction() = default;
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template<class... Stmt>
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void define(Stmt... stmts) {
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DSLBlock block = DSLBlock(DSLStatement(std::move(stmts))...);
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this->define(std::move(block));
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}
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void define(DSLBlock block, Position pos = {});
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/**
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* Invokes the function with the given arguments.
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*/
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template<class... Args>
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DSLExpression operator()(Args&&... args) {
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ExpressionArray argArray;
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argArray.reserve_back(sizeof...(args));
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this->collectArgs(argArray, std::forward<Args>(args)...);
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return this->call(std::move(argArray));
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}
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/**
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* Invokes the function with the given arguments.
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*/
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DSLExpression call(SkTArray<DSLWrapper<DSLExpression>> args,
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Position pos = {});
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DSLExpression call(ExpressionArray args, Position pos = {});
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private:
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void collectArgs(ExpressionArray& args) {}
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template<class... RemainingArgs>
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void collectArgs(ExpressionArray& args, DSLVar& var, RemainingArgs&&... remaining) {
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args.push_back(DSLExpression(var).release());
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collectArgs(args, std::forward<RemainingArgs>(remaining)...);
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}
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template<class... RemainingArgs>
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void collectArgs(ExpressionArray& args, DSLExpression expr, RemainingArgs&&... remaining) {
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args.push_back(expr.release());
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collectArgs(args, std::forward<RemainingArgs>(remaining)...);
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}
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void init(DSLModifiers modifiers, const DSLType& returnType, std::string_view name,
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SkTArray<DSLParameter*> params, Position pos);
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const SkSL::FunctionDeclaration* fDecl = nullptr;
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SkSL::Position fPosition;
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};
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} // namespace dsl
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} // namespace SkSL
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#endif
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