149 lines
5.5 KiB
C++
149 lines
5.5 KiB
C++
#include <iostream>
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#include <vector>
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#include <set>
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#include <string>
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#include <memory>
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#include "Parsodus/grammar.h"
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#include "Parsodus/lrtables/generator.h"
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#include "Parsodus/lrtables/SLR1Itemset.h"
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#include "gtest/gtest.h"
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#define ACCEPT_STATE 0
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#define ERROR_STATE 0
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TEST(lr0, test0) {
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pds::Grammar grammar;
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grammar.start = "S";
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grammar.variables = {"S","A","E"};
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grammar.terminals = {";", "id", ":=", "+"};
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std::shared_ptr<pds::Rule> rule(new pds::Rule());
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rule->head = "S";
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rule->tail = {"S",";","A"};
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grammar.rules.push_back(std::make_shared<pds::Rule>(*rule));
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rule->head = "S";
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rule->tail = {"A"};
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grammar.rules.push_back(std::make_shared<pds::Rule>(*rule));
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rule->head = "A";
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rule->tail = {"E"};
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grammar.rules.push_back(std::make_shared<pds::Rule>(*rule));
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rule->head = "A";
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rule->tail = {"id",":=","E"};
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grammar.rules.push_back(std::make_shared<pds::Rule>(*rule));
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rule->head = "E";
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rule->tail = {"E","+","id"};
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grammar.rules.push_back(std::make_shared<pds::Rule>(*rule));
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rule->head = "E";
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rule->tail = {"id"};
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grammar.rules.push_back(std::make_shared<pds::Rule>(*rule));
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{
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pds::lr::Generator<pds::lr::LR0Itemset> g(grammar);
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ASSERT_THROW(g.generate(), std::runtime_error);
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try {
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g.generate();
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} catch (std::runtime_error& e) {
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ASSERT_EQ(std::string("shift-reduce"), e.what());
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}
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}
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{
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pds::lr::Generator<pds::lr::SLR1Itemset> g(grammar);
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ASSERT_NO_THROW(g.generate());
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}
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// auto tbl = g.generate(); // LRTable
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// EXPECT_THROW(throw "shift-reduce", std::exception);
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/*
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std::vector<std::map<std::string, std::pair<pds::lr::Action,std::size_t> >> act {
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{ {"id", std::make_pair(pds::lr::Action::SHIFT,4) } },
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{ {";", std::make_pair(pds::lr::Action::SHIFT,5) },
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{"$", std::make_pair(pds::lr::Action::SHIFT, ACCEPT_STATE)}
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},
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,3) },
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{";", std::make_pair(pds::lr::Action::REDUCE,3) },
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{"+", std::make_pair(pds::lr::Action::REDUCE,3) },
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{":=", std::make_pair(pds::lr::Action::REDUCE,3) },
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{"$", std::make_pair(pds::lr::Action::REDUCE, 3)}
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},
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,4) },
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{";", std::make_pair(pds::lr::Action::REDUCE,4) },
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{"+", std::make_pair(pds::lr::Action::ERROR, ERROR_STATE) },
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{":=", std::make_pair(pds::lr::Action::REDUCE,4) },
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{"$", std::make_pair(pds::lr::Action::REDUCE,4)}
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},
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,7) },
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{";", std::make_pair(pds::lr::Action::REDUCE,7) },
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{"+", std::make_pair(pds::lr::Action::REDUCE,7) },
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{":=", std::make_pair(pds::lr::Action::ERROR, ERROR_STATE) },
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{"$", std::make_pair(pds::lr::Action::REDUCE, 7)}
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},
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{ {"id", std::make_pair(pds::lr::Action::SHIFT,4) } },
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{ {"id", std::make_pair(pds::lr::Action::SHIFT,9) } },
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{ {"id", std::make_pair(pds::lr::Action::SHIFT, 11) } },
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,2) },
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{";", std::make_pair(pds::lr::Action::REDUCE,2) },
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{"+", std::make_pair(pds::lr::Action::REDUCE,2) },
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{":=", std::make_pair(pds::lr::Action::REDUCE,2) },
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{"$", std::make_pair(pds::lr::Action::REDUCE, 2)}
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},
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,6) },
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{";", std::make_pair(pds::lr::Action::REDUCE,6) },
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{"+", std::make_pair(pds::lr::Action::REDUCE,6) },
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{":=", std::make_pair(pds::lr::Action::REDUCE,6) },
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{"$", std::make_pair(pds::lr::Action::REDUCE, 6)}
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},
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,5) },
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{";", std::make_pair(pds::lr::Action::REDUCE,5) },
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{"+", std::make_pair(pds::lr::Action::ERROR, ERROR_STATE) },
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{":=", std::make_pair(pds::lr::Action::REDUCE,5) },
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{"$", std::make_pair(pds::lr::Action::REDUCE,5)}
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},
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{ {"id", std::make_pair(pds::lr::Action::REDUCE,7) },
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{";", std::make_pair(pds::lr::Action::REDUCE,7) },
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{"+", std::make_pair(pds::lr::Action::REDUCE, 7) },
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{":=", std::make_pair(pds::lr::Action::REDUCE,7) },
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{"$", std::make_pair(pds::lr::Action::REDUCE,7)}
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},
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};
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std::vector<std::map<std::string, std::size_t>> goto_ = {
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{ {"S",1}, {"A",2}, {"E",3} }, // state_num:1
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{ {"A",8}, {"E",3} }, // state_num:5
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{ {"E",10} }, // state_num:7
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};
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// Action: enum {ERROR,SHIFT,REDUCE,ACCEPT}
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ASSERT_EQ(goto_.size(),tbl.goto_.size());
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ASSERT_EQ(act.size(),tbl.act.size());
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for(std::size_t i = 0; i < goto_.size(); i++) {
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EXPECT_EQ(goto_[i].first,tbl.goto_[i].first);
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EXPECT_EQ(goto_[i].second.first,tbl.goto_[i].second.first);
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EXPECT_EQ(goto_[i].second.second,tbl.goto_[i].second.second);
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}
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for(std::size_t i = 0; i < act.size(); i++) {
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EXPECT_EQ(act[i].first,tbl.act[i].first);
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EXPECT_EQ(act[i].second.first,tbl.act[i].second.first);
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EXPECT_EQ(act[i].second.second,tbl.act[i].second.second);
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}
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*/
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}
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