Add generator_t

src/CMakeLists.txt

@@ -1,4 +1,5 @@
 add_executable(solar
+  generator.cpp
   lex.cpp
   parser.cpp
   parser_state.cpp

src/generator.cpp

@@ -0,0 +1,44 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "generator.hpp"
+
+
+namespace solar {
+
+generator_t::generator_t(const std::set<item_t> &rules0) {
+	for (item_t rule : rules0) {
+		rules.emplace(rule.get_lhs(), rule);
+
+		while (rule.has_next()) {
+			items.emplace(rule.get_next_symbol(), rule);
+			rule.shift();
+		}
+	}
+
+}
+
+}

src/generator.hpp

@@ -0,0 +1,46 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "item.hpp"
+
+#include <set>
+#include <map>
+
+
+namespace solar {
+
+class generator_t {
+private:
+	std::multimap<std::string, item_t> rules;
+	std::multimap<symbol_t, item_t> items;
+
+public:
+	generator_t(const std::set<item_t> &rules0);
+};
+
+}

src/parser_state.cpp

@@ -53,12 +53,7 @@ void parser_state_t::add_rule_terminal(unsigned char term) {
 }
 
 void parser_state_t::add_rule() {
-	rules.emplace(current.get_lhs(), current);
-
-	while (current.has_next()) {
-		items.emplace(current.get_next_symbol(), current);
-		current.shift();
-	}
+	rules.emplace(current);
 }
 
 }

src/parser_state.hpp

@@ -28,23 +28,21 @@
 
 #include "item.hpp"
 
-#include <map>
-#include <utility>
+#include <set>
 
 
 namespace solar {
 
 class parser_state_t {
 private:
-	std::multimap<std::string, item_t> rules;
-	std::multimap<symbol_t, item_t> items;
+	std::set<item_t> rules;
 
 	item_t current;
 
 public:
 	parser_state_t() : current("") {}
 
-	const std::multimap<std::string, item_t> & get_rules() const {
+	const std::set<item_t> & get_rules() const {
 		return rules;
 	}
 

src/solar.cpp

@@ -26,6 +26,8 @@
 
 #include "lex.hpp"
 #include "parser.hpp"
+#include "generator.hpp"
+
 
 #include <cstdio>
 #include <memory>
@@ -79,5 +81,7 @@ int main() {
 	if (!read_grammar("grammar.y", &state))
 		return 1;
 
+	generator_t generator(state.get_rules());
+
 	return 0;
 }