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// Copyright 2023 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <optional>
#include <string>
#include <string_view>
#include "Common/Assembler/AssemblerShared.h"
#include "Common/Assembler/GekkoLexer.h"
#include "Common/CommonTypes.h"
namespace Common::GekkoAssembler::detail
{
class ParsePlugin;
struct ParseState
{
ParseState(std::string_view input_str, ParsePlugin& plugin);
bool HasToken(TokenType tp) const;
void ParseToken(TokenType tp);
void EmitErrorHere(std::string&& message);
Lexer lexer;
ParsePlugin& plugin;
std::optional<AssemblerError> error;
bool eof;
};
enum class AsmOp
{
Or,
Xor,
And,
Lsh,
Rsh,
Add,
Sub,
Mul,
Div,
Neg,
Not
};
enum class Terminal
{
Hex,
Dec,
Oct,
Bin,
Flt,
Str,
Id,
GPR,
FPR,
SPR,
CRField,
Lt,
Gt,
Eq,
So,
Dot,
NumLabFwd,
NumLabBwd,
};
enum class ParenType
{
Normal,
RelConv,
};
// Overridable plugin class supporting a series of skeleton functions which get called when
// the parser parses a given point of interest
class ParsePlugin
{
public:
ParsePlugin() : m_owner(nullptr) {}
virtual ~ParsePlugin() = default;
void SetOwner(ParseState* o) { m_owner = o; }
void ForwardError(AssemblerError&& err) { m_owner_error = std::move(err); }
std::optional<AssemblerError>& Error() { return m_owner_error; }
virtual void PostParseAction() {}
// Nonterminal callouts
// Pre occurs prior to the head nonterminal being parsed
// Post occurs after the nonterminal has been fully parsed
virtual void OnDirectivePre(GekkoDirective directive) {}
virtual void OnDirectivePost(GekkoDirective directive) {}
virtual void OnInstructionPre(const ParseInfo& mnemonic_info, bool extended) {}
virtual void OnInstructionPost(const ParseInfo& mnemonic_info, bool extended) {}
virtual void OnOperandPre() {}
virtual void OnOperandPost() {}
virtual void OnResolvedExprPre() {}
virtual void OnResolvedExprPost() {}
// Operator callouts
// All occur after the relevant operands have been parsed
virtual void OnOperator(AsmOp operation) {}
// Individual token callouts
// All occur prior to the token being parsed
// Due to ambiguity of some tokens, an explicit operation is provided
virtual void OnTerminal(Terminal type, const AssemblerToken& val) {}
virtual void OnHiaddr(std::string_view id) {}
virtual void OnLoaddr(std::string_view id) {}
virtual void OnOpenParen(ParenType type) {}
virtual void OnCloseParen(ParenType type) {}
virtual void OnError() {}
virtual void OnLabelDecl(std::string_view name) {}
virtual void OnNumericLabelDecl(std::string_view name, u32 parse_num) {}
virtual void OnVarDecl(std::string_view name) {}
protected:
ParseState* m_owner;
std::optional<AssemblerError> m_owner_error;
};
// Parse the provided input with a plugin to handle what to do with certain points of interest
// e.g. Convert to an IR for generating final machine code, picking up syntactical information
void ParseWithPlugin(ParsePlugin* plugin, std::string_view input);
} // namespace Common::GekkoAssembler::detail
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