dolphin/Source/Core/InputCommon/ControlReference/FunctionExpression.h
Lioncash 10fea99d80 InputCommon/FunctionExpression: Make MakeFunctionExpression() take a std::string_view
There's nothing within this function that requires a copy of the string
to be made, so we can make use of a non-owning view
2019-11-22 15:36:18 -05:00

54 lines
1.2 KiB
C++

// Copyright 2019 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <memory>
#include <string>
#include <string_view>
#include <variant>
#include <vector>
#include "Common/CommonTypes.h"
#include "InputCommon/ControlReference/ExpressionParser.h"
namespace ciface::ExpressionParser
{
class FunctionExpression : public Expression
{
public:
struct ArgumentsAreValid
{
};
struct ExpectedArguments
{
std::string text;
};
using ArgumentValidation = std::variant<ArgumentsAreValid, ExpectedArguments>;
int CountNumControls() const override;
void UpdateReferences(ControlEnvironment& env) override;
ArgumentValidation SetArguments(std::vector<std::unique_ptr<Expression>>&& args);
void SetValue(ControlState value) override;
protected:
virtual ArgumentValidation
ValidateArguments(const std::vector<std::unique_ptr<Expression>>& args) = 0;
Expression& GetArg(u32 number);
const Expression& GetArg(u32 number) const;
u32 GetArgCount() const;
private:
std::vector<std::unique_ptr<Expression>> m_args;
};
std::unique_ptr<FunctionExpression> MakeFunctionExpression(std::string_view name);
} // namespace ciface::ExpressionParser