259 lines
9.2 KiB
C++
259 lines
9.2 KiB
C++
#include "libsyntax.h"
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#include "ast_basic.h"
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using namespace lib_syntax;
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using namespace std;
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using namespace lib_token;
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using namespace ast_basic;
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TokenMatch::TokenMatch(shared_ptr<const TokenDefine> define) : define_peer(define) {}
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QList<std::shared_ptr<const BaseRule>> TokenMatch::children() const { return QList<std::shared_ptr<const BaseRule>>(); }
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std::tuple<BaseRule::MatchResult, uint, std::shared_ptr<const Token>> TokenMatch::match(std::shared_ptr<const Token> remains_head) const {
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QString token_seqs = this->token_present();
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if (remains_head && remains_head->define()->name() == define_peer->name())
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return std::make_tuple(MatchResult::Success, 1, remains_head->nextToken());
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return std::make_tuple(MatchResult::Fail, 0, nullptr);
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// auto mis_match = define_peer->name();
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// auto real_match = stream.first()->define()->name();
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}
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// std::tuple<std::shared_ptr<const ast_basic::Expression>, std::shared_ptr<const lib_token::Token>>
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std::tuple<std::shared_ptr<const Expression>, std::shared_ptr<const Token>> TokenMatch::parse(std::shared_ptr<ParseContext> rt_inst, std::shared_ptr<const Token> head) const {
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if (!head)
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throw new SyntaxException(u8"Syntax[0x0000]token流提前终止");
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if (head->define()->name() == define_peer->name()) {
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rt_inst->currentInst()->addToken(head);
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return std::make_tuple(nullptr, head->nextToken());
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}
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throw new SyntaxException(QString(u8"Syntax[0x00001]语法匹配错误，不能识别token：%1<%2,%3>")
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.arg(head->content()).arg(head->row()).arg(head->column()));
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}
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QString TokenMatch::token_present() const {
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return QString(u8"<%1>").arg(this->define_peer->name());
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}
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Rept::Rept(std::shared_ptr<const BaseRule> rule, int min, int max) : rule_peer(rule), min_match(min), max_match(max) {}
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QList<std::shared_ptr<const BaseRule>> Rept::children() const { return QList<std::shared_ptr<const BaseRule>>() << rule_peer; }
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std::tuple<BaseRule::MatchResult, uint, std::shared_ptr<const Token>> Rept::match(std::shared_ptr<const Token> list_head) const {
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auto token_offset = 0;
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QString token_seqs = this->token_present();
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auto temp_head = list_head;
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// min-match
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for (auto idx = 0; idx < min_match; ++idx) {
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auto result = rule_peer->match(temp_head);
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token_offset += std::get<1>(result);
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temp_head = std::get<2>(result);
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if (std::get<0>(result) != MatchResult::Success) {
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return std::make_tuple(token_offset ? MatchResult::Part : MatchResult::Fail, token_offset, temp_head);
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}
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}
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// max-match
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for (auto idx = min_match; idx < max_match; ++idx) {
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auto result = rule_peer->match(temp_head);
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switch (std::get<0>(result)) {
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case MatchResult::Fail:
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case MatchResult::Part:
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return std::make_tuple(MatchResult::Success, token_offset, temp_head);
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default:
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temp_head = std::get<2>(result);
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token_offset += std::get<1>(result);
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break;
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}
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}
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return std::make_tuple(MatchResult::Success, token_offset, temp_head);
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}
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std::tuple<std::shared_ptr<const Expression>, std::shared_ptr<const Token>> Rept::parse(std::shared_ptr<ParseContext> rt_inst, std::shared_ptr<const Token> head) const {
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auto temp_head = head;
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// min-match
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for (auto idx = 0; idx < min_match; ++idx) {
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auto result_gen = rule_peer->parse(rt_inst, temp_head);
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if (std::get<0>(result_gen))
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rt_inst->currentInst()->addChild(std::get<0>(result_gen));
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temp_head = std::get<1>(result_gen);
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}
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// max-match
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for (auto idx = min_match; idx < max_match; ++idx) {
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try {
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auto result_gen = rule_peer->parse(rt_inst, temp_head);
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if (std::get<0>(result_gen))
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rt_inst->currentInst()->addChild(std::get<0>(result_gen));
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temp_head = std::get<1>(result_gen);
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}
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catch (...) {
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return std::make_tuple(nullptr, temp_head);
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}
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}
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return std::make_tuple(nullptr, temp_head);
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}
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QString Rept::token_present() const
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{
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return u8"(" + this->rule_peer->token_present() + QString(u8"{%1, %2}").arg(min_match).arg(max_match) + u8")";
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}
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Seqs::Seqs(const QList<std::shared_ptr<const BaseRule>> mbrs) : mbrs_store(mbrs) {}
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QList<std::shared_ptr<const BaseRule>> Seqs::children() const { return mbrs_store; }
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std::tuple<BaseRule::MatchResult, uint, std::shared_ptr<const Token>> Seqs::match(std::shared_ptr<const Token> list_head) const {
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auto token_offset = 0;
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QString token_seqs = this->token_present();
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auto temp_head = list_head;
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for (auto& r : mbrs_store) {
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auto v_token_seqs = r->token_present();
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auto result = r->match(list_head);
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token_offset += std::get<1>(result);
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temp_head = std::get<2>(result);
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switch (std::get<0>(result)) {
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case MatchResult::Fail:
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case MatchResult::Part:
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return std::make_tuple(token_offset ? MatchResult::Part : MatchResult::Fail, token_offset, temp_head);
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default:
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break;
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}
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}
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return std::make_tuple(MatchResult::Success, token_offset, temp_head);
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}
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std::tuple<std::shared_ptr<const Expression>, std::shared_ptr<const Token>> Seqs::parse(std::shared_ptr<ParseContext> rt_inst, std::shared_ptr<const Token> head) const {
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auto temp_head = head;
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for (auto& r : mbrs_store) {
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auto rst_gene = r->parse(rt_inst, temp_head);
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temp_head = std::get<1>(rst_gene);
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if (std::get<0>(rst_gene))
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rt_inst->currentInst()->addChild(std::get<0>(rst_gene));
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}
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return std::make_tuple(nullptr, temp_head);
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}
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QString Seqs::token_present() const
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{
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QString content;
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for (auto& it : children())
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content += it->token_present();
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return QString(u8"(%1)").arg(content);
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}
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std::tuple<BaseRule::MatchResult, uint, std::shared_ptr<const BaseRule>, std::shared_ptr<const Token>>
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Any::rule_select(std::shared_ptr<const Token> head) const {
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QString token_seqs = this->token_present();
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std::tuple<MatchResult, uint, std::shared_ptr<const BaseRule>, std::shared_ptr<const Token>> temp = std::make_tuple(MatchResult::Fail, 0, nullptr, nullptr);
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for (auto& r : mbrs_store) {
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auto mbr_seqs = r->token_present();
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auto result = r->match(head);
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if (std::get<0>(result) == MatchResult::Success)
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return std::make_tuple(std::get<0>(result), std::get<1>(result), r, std::get<2>(result));
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else if (std::get<0>(result) == MatchResult::Part) {
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if (std::get<0>(temp) == MatchResult::Fail || std::get<1>(result) > std::get<1>(temp))
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temp = std::make_tuple(MatchResult::Part, std::get<1>(result), r, std::get<2>(result));
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else
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temp = std::make_tuple(MatchResult::Part, std::get<1>(temp), std::get<2>(temp), std::get<3>(temp));
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}
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else if (std::get<0>(temp) == MatchResult::Fail) {
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if (!std::get<2>(temp) || std::get<1>(result) > std::get<1>(temp))
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temp = std::make_tuple(MatchResult::Fail, std::get<1>(result), r, std::get<2>(result));
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else
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temp = std::make_tuple(MatchResult::Fail, std::get<1>(temp), std::get<2>(temp), std::get<3>(temp));
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}
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}
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return temp;
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}
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Any::Any(const QList<std::shared_ptr<const BaseRule>> mbrs) : mbrs_store(mbrs) {}
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QList<std::shared_ptr<const BaseRule>> Any::children() const { return mbrs_store; }
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std::tuple<BaseRule::MatchResult, uint, std::shared_ptr<const Token>> Any::match(std::shared_ptr<const Token> list_head) const {
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auto item = rule_select(list_head);
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return std::make_tuple(std::get<0>(item), std::get<1>(item), std::get<3>(item));
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}
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std::tuple<std::shared_ptr<const Expression>, std::shared_ptr<const Token>> Any::parse(std::shared_ptr<ParseContext> rt_inst, std::shared_ptr<const Token> head) const {
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auto temp = rule_select(head);
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return std::get<2>(temp)->parse(rt_inst, head);
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}
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QString Any::token_present() const
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{
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QString members_content;
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for (auto& it : children()) {
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members_content += it->token_present() + u8"|";
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}
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return u8"(" + members_content.mid(0, members_content.size() - 1) + u8")";
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}
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SyntaxException::SyntaxException(const QString& message) { this->msg_store = message; }
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QString SyntaxException::message() const { return msg_store; }
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ExpressionRule::ExpressionRule(const QString& rule_name, int expr_mark) : name_store(rule_name) {
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this->filter_proc = [](const TokenSeqs& seqs) { return seqs; };
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this->mark_store = expr_mark;
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}
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std::shared_ptr<const ExpressionRule> ExpressionRule::reloadRule(std::function<TokenSeqs(const TokenSeqs&)> filter, std::shared_ptr<const BaseRule> rule) {
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auto ninst = makeCopy();
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ninst->child_store = rule;
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ninst->filter_proc = filter;
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return ninst;
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}
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QString ExpressionRule::name() const { return name_store; }
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int ExpressionRule::typeMark() const { return this->mark_store; }
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QList<std::shared_ptr<const BaseRule>> ExpressionRule::children() const {
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return QList<std::shared_ptr<const BaseRule>>() << this->child_store;
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}
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std::tuple<BaseRule::MatchResult, uint, std::shared_ptr<const Token>> ExpressionRule::match(std::shared_ptr<const Token> list_head) const {
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return child_store->match(list_head);
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}
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std::tuple<std::shared_ptr<const Expression>, std::shared_ptr<const Token>> ExpressionRule::parse(std::shared_ptr<ParseContext> rt_inst, std::shared_ptr<const Token> head) const {
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std::shared_ptr<ast_basic::Expression> elm_ast = this->newEmptyInstance();
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rt_inst->pushExpressionRule(this->shared_from_this());
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rt_inst->pushInst(elm_ast);
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auto rstg = child_store->parse(rt_inst, head);
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auto tokens_decl = this->filter_proc(elm_ast->tokens());
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elm_ast->tokensReset(tokens_decl);
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rt_inst->popExpressionRule();
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return std::make_tuple(rt_inst->popInst(), std::get<1>(rstg));
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}
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QString ExpressionRule::token_present() const {
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return QString(u8"(%1)").arg(child_store->token_present());
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}
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