public static Surf.Set First(Bamboo.Parsing.Grammars.Grammar grammar)
{
Surf.Set FIRST = new Surf.Set();
foreach (string symbol in grammar.Terminals)
{
FIRST.Add(new Surf.Tuple(new object[] { symbol, new Surf.Set(new object[] { symbol }) }));
}
foreach (string symbol in grammar.Nonterminals)
{
FIRST.Add(new Surf.Tuple(new object[] { symbol, new Surf.Set() }));
}
List <Bamboo.Parsing.Grammars.Production> remaining = Copy(grammar.Productions);
while (remaining.Count > 0)
{
for (int i = 0; i < remaining.Count; i++)
{
Bamboo.Parsing.Grammars.Production production = remaining[i];
if (CanResolve(production.Expression, remaining))
{
First(production.Nonterminal, production.Expression, FIRST);
remaining.Remove(production);
break;
}
}
}
return(FIRST);
}
public static void Generate(string name, string nspace, Bamboo.Parsing.Grammars.Grammar grammar, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("using System;");
writer.WriteLine("");
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
writer.WriteLine(" public class "+ name + "NodeType");
writer.WriteLine(" {");
int i = 0;
writer.WriteLine(" // Nonterminals");
foreach (string nonterminal in grammar.Nonterminals)
{
writer.WriteLine(" public const int "+ nonterminal + " = " + i + ";");
i++;
}
writer.WriteLine("");
writer.WriteLine(" // Terminals");
foreach (string terminal in grammar.Terminals)
{
writer.WriteLine(" public const int "+ terminal + " = " + i + ";");
i++;
}
writer.WriteLine("");
writer.WriteLine(" }");
writer.WriteLine("}");
}
public static Surf.Set Predict(Bamboo.Parsing.Grammars.Grammar grammar, Surf.Set FIRST, Surf.Set FOLLOW)
{
Surf.Set PREDICT = new Surf.Set();
int i = 0;
foreach (Bamboo.Parsing.Grammars.Production production in grammar.Productions)
{
Surf.Set PREDICT_i = ((Surf.Set)FIRST.Apply(GetFirstSymbol(production.Expression))).Difference(EPSILON);
if (((Surf.Set)FIRST.Apply(GetFirstSymbol(production.Expression))).Contains("EPSILON"))
{
Union(PREDICT_i, (Surf.Set)FOLLOW.Apply(production.Nonterminal));
}
PREDICT.Add(new Surf.Tuple(new object[] { i, production, PREDICT_i }));
i++;
}
AssertDisjoint(PREDICT, grammar.Nonterminals);
return(PREDICT);
}
public static void Generate(string name, string nspace, Bamboo.Parsing.Grammars.Grammar grammar, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("using System;");
writer.WriteLine("");
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
writer.WriteLine(" public class "+ name + "Node : System.IComparable");
writer.WriteLine(" {");
writer.WriteLine(" public int Type;");
writer.WriteLine(" public string Value;");
writer.WriteLine(" public System.Collections.Generic.List<"+ name + "Node> Nodes = new System.Collections.Generic.List<" + name + "Node>();");
writer.WriteLine("");
writer.WriteLine(" public "+ name + "Node(int type)");
writer.WriteLine(" {");
writer.WriteLine(" Type = type;");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" public "+ name + "Node(int type, string value)");
writer.WriteLine(" {");
writer.WriteLine(" Type = type;");
writer.WriteLine(" Value = value;");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" public int CompareTo(object obj)");
writer.WriteLine(" {");
writer.WriteLine(" "+ name + "Node node = (" + name + "Node)obj;");
writer.WriteLine(" int cmp = this.Type.CompareTo(node.Type);");
writer.WriteLine(" if (cmp != 0)");
writer.WriteLine(" {");
writer.WriteLine(" return cmp;");
writer.WriteLine(" }");
writer.WriteLine(" if (this.Value != null && node.Value != null)");
writer.WriteLine(" {");
writer.WriteLine(" cmp = this.Value.CompareTo(node.Value);");
writer.WriteLine(" if (cmp != 0)");
writer.WriteLine(" {");
writer.WriteLine(" return cmp;");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine(" else if (this.Value != null)");
writer.WriteLine(" {");
writer.WriteLine(" return 1;");
writer.WriteLine(" }");
writer.WriteLine(" else if (node.Value != null)");
writer.WriteLine(" {");
writer.WriteLine(" return -1;");
writer.WriteLine(" }");
writer.WriteLine(" int min = Math.Min(this.Nodes.Count, node.Nodes.Count);");
writer.WriteLine(" for (int i = 0; i < min; i++)");
writer.WriteLine(" {");
writer.WriteLine(" cmp = this.Nodes[i].CompareTo(node.Nodes[i]);");
writer.WriteLine(" if (cmp != 0)");
writer.WriteLine(" {");
writer.WriteLine(" return cmp;");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine(" return (this.Nodes.Count == node.Nodes.Count) ? 0 : ((this.Nodes.Count > node.Nodes.Count) ? -1 : 1);");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" }");
writer.WriteLine("}");
}
public static Surf.Set Follow(Bamboo.Parsing.Grammars.Grammar grammar, Surf.Set FIRST)
{
FollowBuilder followBuilder = new FollowBuilder(grammar, FIRST);
return(followBuilder.Build());
}
public static void Generate(string name, string nspace, Bamboo.Parsing.Grammars.Grammar grammar, Surf.Set FIRST, Surf.Set FOLLOW, Surf.Set PREDICT, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("using System;");
writer.WriteLine("");
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
writer.WriteLine(" public class "+ name + "Parser");
writer.WriteLine(" {");
writer.WriteLine(" private "+ name + "Tokenizer _tokenizer = new " + name + "Tokenizer();");
//TODO use a state variable.
writer.WriteLine(" private "+ name + "TextReader _reader;");
writer.WriteLine(" private "+ name + "Token _token;");
writer.WriteLine("");
writer.WriteLine(" public "+ name + "Parser(" + name + "TextReader reader)");
writer.WriteLine(" {");
writer.WriteLine(" this._reader = reader;");
writer.WriteLine(" this._token = this._tokenizer.Tokenize(this._reader);");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" public "+ name + "Node Parse()");
writer.WriteLine(" {");
writer.WriteLine(" return Parse"+ grammar.Productions[0].Nonterminal + "();");
writer.WriteLine(" }");
writer.WriteLine("");
foreach (string nonterminal in grammar.Nonterminals)
{
writer.WriteLine(" private "+ name + "Node Parse" + nonterminal + "()");
writer.WriteLine(" {");
writer.WriteLine(" "+ name + "Node node = new " + name + "Node(" + name + "NodeType." + nonterminal + ");");
writer.WriteLine("");
writer.WriteLine(" switch (this._token.Type)");
writer.WriteLine(" {");
bool hasDefault = false;
foreach (Surf.Tuple tuple in PREDICT)
{
int n = (int)tuple[0];
Bamboo.Parsing.Grammars.Production production = (Bamboo.Parsing.Grammars.Production)tuple[1];
Surf.Set predict = (Surf.Set)tuple[2];
if (production.Nonterminal.Equals(nonterminal))
{
List <Bamboo.Parsing.Grammars.Expression> expressions = ToList(production.Expression);
//predict.Count == 0 &&
if (expressions.Count == 1 && ((Bamboo.Parsing.Grammars.Symbol)expressions[0]).Token.Equals("EPSILON"))
{
hasDefault = true;
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" return node;");
writer.WriteLine(" }");
}
else
{
if (predict.Count == 1 && predict[0].Equals("EOF"))
{
writer.WriteLine(" case "+ name + "TokenType._EOF_:");
writer.WriteLine(" {");
writer.WriteLine(" return node;");
writer.WriteLine(" }");
}
else
{
foreach (string symbol in predict)
{
writer.WriteLine(" case "+ name + "TokenType." + symbol + ":");
}
writer.WriteLine(" {");
if (!((Bamboo.Parsing.Grammars.Symbol)expressions[0]).Token.Equals("EPSILON"))
{
for (int i = 0; i < expressions.Count; i++)
{
writer.WriteLine(" node.Nodes.Add(Parse"+ ((Bamboo.Parsing.Grammars.Symbol)expressions[i]).Token + "());");
}
}
writer.WriteLine(" return node;");
writer.WriteLine(" }");
}
}
}
}
if (!hasDefault)
{
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Syntax error.\");");
writer.WriteLine(" }");
}
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine("");
}
foreach (string terminal in grammar.Terminals)
{
if (!terminal.Equals("EPSILON"))
{
writer.WriteLine(" private "+ name + "Node Parse" + terminal + "()");
writer.WriteLine(" {");
writer.WriteLine(" "+ name + "Node node = new " + name + "Node(" + name + "NodeType." + terminal + ", this._token.Value);");
writer.WriteLine(" this._token = this._tokenizer.Tokenize(this._reader);");
writer.WriteLine(" return node;");
writer.WriteLine(" }");
writer.WriteLine("");
}
}
writer.WriteLine(" }");
writer.WriteLine("}");
}
public static void Generate(string name, string nspace, Bamboo.Parsing.Grammars.Grammar grammar, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("using System;");
writer.WriteLine("");
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
writer.WriteLine(" public class "+ name + "NodePrinter");
writer.WriteLine(" {");
writer.WriteLine("");
writer.WriteLine(" public static void Print("+ name + "Node node, System.IO.TextWriter writer)");
writer.WriteLine(" {");
writer.WriteLine(" Print(node, writer, 0);");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" private static void Print("+ name + "Node node, System.IO.TextWriter writer, int indentationLevel)");
writer.WriteLine(" {");
writer.WriteLine(" switch(node.Type)");
writer.WriteLine(" {");
int i = 0;
foreach (string nonterminal in grammar.Nonterminals)
{
writer.WriteLine(" case "+ name + "NodeType." + nonterminal + " :");
writer.WriteLine(" {");
writer.WriteLine(" for(int i = 0; i < indentationLevel; i++)");
writer.WriteLine(" {");
writer.WriteLine(" System.Console.Write(\" \");");
writer.WriteLine(" }");
writer.WriteLine(" System.Console.WriteLine(\""+ nonterminal + ":\");");
writer.WriteLine(" foreach("+ name + "Node node2 in node.Nodes)");
writer.WriteLine(" {");
writer.WriteLine(" Print(node2, writer, indentationLevel + 1);");
writer.WriteLine(" }");
writer.WriteLine(" break;");
writer.WriteLine(" }");
i++;
}
foreach (string terminal in grammar.Terminals)
{
writer.WriteLine(" case "+ name + "NodeType." + terminal + " :");
writer.WriteLine(" {");
writer.WriteLine(" for(int i = 0; i < indentationLevel; i++)");
writer.WriteLine(" {");
writer.WriteLine(" System.Console.Write(\" \");");
writer.WriteLine(" }");
writer.WriteLine(" System.Console.WriteLine(\""+ terminal + ": \" + node.Value);");
writer.WriteLine(" break;");
writer.WriteLine(" }");
i++;
}
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Invalid node type.\");");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" private "+ name + "NodePrinter()");
writer.WriteLine(" {");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" }");
writer.WriteLine("}");
}
public static void Generate(string name, string nspace, Bamboo.Parsing.Grammars.Grammar grammar, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("using System;");
writer.WriteLine("");
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
writer.WriteLine(" public abstract class "+ name + "Evaluator");
writer.WriteLine(" {");
writer.WriteLine("");
writer.WriteLine(" public "+ name + "Evaluator()");
writer.WriteLine(" {");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" public object Evaluate("+ name + "Node node)");
writer.WriteLine(" {");
writer.WriteLine(" switch (node.Type)");
writer.WriteLine(" {");
foreach (string nonterminal in grammar.Nonterminals)
{
writer.WriteLine(" case "+ name + "NodeType." + nonterminal + ":");
writer.WriteLine(" {");
foreach (Bamboo.Parsing.Grammars.Production production in GetProductions(nonterminal, grammar))
{
if (production.Expression is Bamboo.Parsing.Grammars.Concatenation)
{
Bamboo.Parsing.Grammars.Concatenation concatenation = (Bamboo.Parsing.Grammars.Concatenation)production.Expression;
string tag = "";
writer.Write(" if(");
writer.Write("node.Nodes.Count == " + concatenation.Expressions.Count);
int i = 0;
foreach (Bamboo.Parsing.Grammars.Symbol symbol in concatenation.Expressions)
{
tag += symbol.Token;
writer.Write(" && node.Nodes[" + i + "].Type == " + name + "NodeType." + symbol.Token + "");
i++;
}
writer.WriteLine(")");
writer.WriteLine(" {");
writer.WriteLine(" return Evaluate"+ tag + "(node);");
writer.WriteLine(" }");
}
else if (production.Expression is Bamboo.Parsing.Grammars.Symbol)
{
Bamboo.Parsing.Grammars.Symbol symbol = (Bamboo.Parsing.Grammars.Symbol)production.Expression;
if (!symbol.Token.Equals("EPSILON"))
{
string tag = symbol.Token;
writer.Write(" if(");
writer.Write("node.Nodes.Count == 1");
writer.Write(" && node.Nodes[0].Type == " + name + "NodeType." + symbol.Token + "");
writer.WriteLine(")");
writer.WriteLine(" {");
if (grammar.Terminals.Contains(symbol.Token))
{
writer.WriteLine(" return Evaluate"+ tag + "(node.Nodes[0].Value);");
}
else
{
writer.WriteLine(" return Evaluate"+ tag + "(node.Nodes[0]);");
}
writer.WriteLine(" }");
}
}
else
{
throw new System.Exception("Invalid expression.");
}
}
writer.WriteLine(" throw new System.Exception(\"Invalid expression.\");");
writer.WriteLine(" }");
}
foreach (string terminal in grammar.Terminals)
{
if (!terminal.Equals("EPSILON"))
{
writer.WriteLine(" case "+ name + "NodeType." + terminal + ":");
writer.WriteLine(" {");
writer.WriteLine(" return Evaluate"+ terminal + "(node.Value);");
writer.WriteLine(" }");
}
}
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Invalid expression.\");");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine("");
Surf.Set functions = new Surf.Set();
functions.Define("EPSILON", "EPSILON");
foreach (string nonterminal in grammar.Nonterminals)
{
foreach (Bamboo.Parsing.Grammars.Production production in GetProductions(nonterminal, grammar))
{
string tag = "";
if (production.Expression is Bamboo.Parsing.Grammars.Concatenation)
{
Bamboo.Parsing.Grammars.Concatenation concatenation = (Bamboo.Parsing.Grammars.Concatenation)production.Expression;
foreach (Bamboo.Parsing.Grammars.Symbol symbol in concatenation.Expressions)
{
tag += symbol.Token;
}
if (!functions.IsDefined(tag))
{
writer.WriteLine(" protected virtual object Evaluate"+ tag + "(" + name + "Node node)");
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Implement.\");");
writer.WriteLine(" }");
writer.WriteLine("");
functions.Define(tag, tag);
}
}
else if (production.Expression is Bamboo.Parsing.Grammars.Symbol)
{
Bamboo.Parsing.Grammars.Symbol symbol = (Bamboo.Parsing.Grammars.Symbol)production.Expression;
tag += symbol.Token;
if (!functions.IsDefined(tag))
{
if (grammar.Terminals.Contains(symbol.Token))
{
writer.WriteLine(" protected virtual object Evaluate"+ tag + "(string value)");
}
else
{
writer.WriteLine(" protected virtual object Evaluate"+ tag + "(" + name + "Node node)");
}
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Implement.\");");
writer.WriteLine(" }");
writer.WriteLine("");
functions.Define(tag, tag);
}
}
else
{
throw new System.Exception("Invalid expression.");
}
}
}
foreach (string terminal in grammar.Terminals)
{
if (!functions.IsDefined(terminal))
{
writer.WriteLine(" protected virtual object Evaluate"+ terminal + "(string value)");
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Implement.\");");
writer.WriteLine(" }");
writer.WriteLine("");
functions.Define(terminal, terminal);
}
}
writer.WriteLine(" }");
writer.WriteLine("}");
}
private static List <Bamboo.Parsing.Grammars.Production> GetProductions(string nonterminal, Bamboo.Parsing.Grammars.Grammar grammar)
{
List <Bamboo.Parsing.Grammars.Production> productions = new List <Bamboo.Parsing.Grammars.Production>();
foreach (Bamboo.Parsing.Grammars.Production production in grammar.Productions)
{
if (production.Nonterminal.Equals(nonterminal))
{
productions.Add(production);
}
}
return(productions);
}
public FollowBuilder(Bamboo.Parsing.Grammars.Grammar grammar, Surf.Set FIRST)
{
this.grammar = grammar;
this.first = FIRST;
this.follow = new Surf.Set();
}
public static void GenerateHeader(string name, string multinamespace, Bamboo.Parsing.Grammars.Grammar grammar, Surf.Set PREDICT, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// " + name + "Parser.h");
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("");
writer.WriteLine("#ifndef " + name.ToUpper() + "PARSER_H");
writer.WriteLine("#define " + name.ToUpper() + "PARSER_H");
writer.WriteLine("");
writer.WriteLine("#include <istream>");
writer.WriteLine("#include <vector>");
writer.WriteLine("#include \"" + name + "Token.h\"");
writer.WriteLine("");
string[] namespaces = multinamespace.Split(new string[] { "::" }, StringSplitOptions.None);
foreach (string nspace in namespaces)
{
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
}
writer.WriteLine(" class "+ name + "Parser");
writer.WriteLine(" {");
writer.WriteLine(" private:");
writer.WriteLine(" int _currentState;");
writer.WriteLine(" std::vector<int> _states;");
writer.WriteLine(" public:");
writer.WriteLine(" Parser() : _currentState(0) { }");
writer.WriteLine(" virtual ~"+ name + "Parser() { }");
writer.WriteLine("");
writer.WriteLine(" void next("+ name + "Token&);");
writer.WriteLine("");
Dictionary <string, string> constructors = new Dictionary <string, string>();
foreach (string nonterminal in grammar.Nonterminals)
{
foreach (Surf.Tuple tuple in PREDICT)
{
int n = (int)tuple[0] + 1;
Bamboo.Parsing.Grammars.Production production = (Bamboo.Parsing.Grammars.Production)tuple[1];
Surf.Set predict = (Surf.Set)tuple[2];
if (production.Nonterminal.Equals(nonterminal))
{
foreach (string symbol in predict)
{
List <Bamboo.Parsing.Grammars.Expression> expressions = ToList(production.Expression);
if (expressions.Count == 1 && ((Bamboo.Parsing.Grammars.Symbol)expressions[0]).Token == "EPSILON")
{
}
else
{
string constructor2 = " virtual void beginParse"+ nonterminal;
foreach (Bamboo.Parsing.Grammars.Symbol expression in expressions)
{
constructor2 += "_" + expression.Token;
}
constructor2 += "() = 0;";
string constructor = " virtual void endParse"+ nonterminal;
foreach (Bamboo.Parsing.Grammars.Symbol expression in expressions)
{
constructor += "_" + expression.Token;
}
constructor += "() = 0;";
if (!constructors.ContainsKey(constructor))
{
writer.WriteLine(constructor2);
writer.WriteLine(constructor);
constructors.Add(constructor, constructor);
}
}
}
}
}
}
writer.WriteLine("");
foreach (string terminal in grammar.Terminals)
{
if (terminal != "EPSILON")
{
writer.WriteLine(" virtual void parse"+ terminal + "(" + name + "Token&) = 0;");
}
}
writer.WriteLine(" };");
foreach (string nspace in namespaces)
{
writer.WriteLine("}");
}
writer.WriteLine("#endif");
}
public static void GenerateClass(string name, string multinamespace, Bamboo.Parsing.Grammars.Grammar grammar, Surf.Set FIRST, Surf.Set FOLLOW, Surf.Set PREDICT, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// " + name + "Parser.cpp");
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("");
writer.WriteLine("#include <istream>");
writer.WriteLine("#include <sstream>");
writer.WriteLine("#include <string>");
writer.WriteLine("#include <vector>");
writer.WriteLine("#include \"" + name + "Parser.h\"");
writer.WriteLine("#include \"" + name + "Token.h\"");
writer.WriteLine("#include \"" + name + "TokenType.h\"");
writer.WriteLine("");
string[] namespaces = multinamespace.Split(new string[] { "::" }, StringSplitOptions.None);
foreach (string nspace in namespaces)
{
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
}
writer.WriteLine(" void Parser::next("+ name + "Token& token)");
writer.WriteLine(" {");
writer.WriteLine(" start:");
writer.WriteLine(" switch(_currentState)");
writer.WriteLine(" {");
Dictionary <string, int> states = new Dictionary <string, int>();
int state = 0;
foreach (string nonterminal in grammar.Nonterminals)
{
states.Add(nonterminal, state++);
}
foreach (string terminal in grammar.Terminals)
{
if (terminal != "EPSILON")
{
states.Add(terminal, state++);
}
}
foreach (string nonterminal in grammar.Nonterminals)
{
bool hasDefault = false;
writer.WriteLine(" case "+ states[nonterminal] + ": // parse" + nonterminal);
writer.WriteLine(" {");
writer.WriteLine(" switch(token.type())");
writer.WriteLine(" {");
int state2 = state;
foreach (Surf.Tuple tuple in PREDICT)
{
int n = (int)tuple[0] + 1;
Bamboo.Parsing.Grammars.Production production = (Bamboo.Parsing.Grammars.Production)tuple[1];
Surf.Set predict = (Surf.Set)tuple[2];
if (production.Nonterminal.Equals(nonterminal))
{
foreach (string symbol in predict)
{
List <Bamboo.Parsing.Grammars.Expression> expressions = ToList(production.Expression);
if (expressions.Count == 1 && ((Bamboo.Parsing.Grammars.Symbol)expressions[0]).Token == "EPSILON")
{
hasDefault = true;
}
else
{
writer.WriteLine(" case TokenType::"+ symbol + ":");
writer.WriteLine(" {");
writer.Write(" beginParse"+ nonterminal);
foreach (Bamboo.Parsing.Grammars.Symbol expression in expressions)
{
writer.Write("_" + expression.Token);
}
writer.WriteLine("();");
writer.Write(" _states.push_back("+ state2++ + "); // endParse" + nonterminal);
foreach (Bamboo.Parsing.Grammars.Symbol expression in expressions)
{
writer.Write("_" + expression.Token);
}
writer.WriteLine("();");
for (int i = (expressions.Count - 1); i >= 1; i--)
{
Bamboo.Parsing.Grammars.Symbol expression = (Bamboo.Parsing.Grammars.Symbol)expressions[i];
writer.WriteLine(" _states.push_back("+ states[expression.Token] + "); // parse" + expression.Token);
}
Bamboo.Parsing.Grammars.Symbol expression2 = (Bamboo.Parsing.Grammars.Symbol)expressions[0];
writer.WriteLine(" _currentState = "+ states[expression2.Token] + "; // parse" + expression2.Token);
writer.WriteLine(" goto start;");
writer.WriteLine(" break;");
writer.WriteLine(" }");
}
}
}
}
if (states[nonterminal] == 0)
{
writer.WriteLine(" case "+ name + "TokenType::_EOF_:");
writer.WriteLine(" {");
writer.WriteLine(" if (_states.size() > 0)");
writer.WriteLine(" {");
writer.WriteLine(" _currentState = _states.back();");
writer.WriteLine(" _states.pop_back();");
writer.WriteLine(" goto start;");
writer.WriteLine(" }");
writer.WriteLine(" break;");
writer.WriteLine(" }");
}
if (hasDefault)
{
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" // EPSILON");
writer.WriteLine(" _currentState = _states.back();");
writer.WriteLine(" _states.pop_back();");
writer.WriteLine(" goto start;");
writer.WriteLine(" }");
}
else
{
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" std::stringstream stream;");
writer.WriteLine(" stream << __FILE__ << \" \" << __LINE__ << \" \" << \"Syntax error.\";");
writer.WriteLine(" throw stream.str();");
writer.WriteLine(" }");
}
writer.WriteLine(" }");
writer.WriteLine(" break;");
writer.WriteLine(" }");
state2 = state;
foreach (Surf.Tuple tuple in PREDICT)
{
int n = (int)tuple[0] + 1;
Bamboo.Parsing.Grammars.Production production = (Bamboo.Parsing.Grammars.Production)tuple[1];
Surf.Set predict = (Surf.Set)tuple[2];
if (production.Nonterminal.Equals(nonterminal))
{
foreach (string symbol in predict)
{
List <Bamboo.Parsing.Grammars.Expression> expressions = ToList(production.Expression);
if (expressions.Count == 1 && ((Bamboo.Parsing.Grammars.Symbol)expressions[0]).Token == "EPSILON")
{
}
else
{
writer.Write(" case "+ state2++ + ": // endParse" + nonterminal);
foreach (Bamboo.Parsing.Grammars.Symbol expression in expressions)
{
writer.Write("_" + expression.Token);
}
writer.WriteLine("();");
writer.WriteLine(" {");
writer.Write(" "+ "endParse" + nonterminal);
foreach (Bamboo.Parsing.Grammars.Symbol expression in expressions)
{
writer.Write("_" + expression.Token);
}
writer.WriteLine("();");
writer.WriteLine(" if (_states.size() == 0)");
writer.WriteLine(" {");
writer.WriteLine(" _currentState = 0;");
writer.WriteLine(" }");
writer.WriteLine(" else");
writer.WriteLine(" {");
writer.WriteLine(" _currentState = _states.back();");
writer.WriteLine(" _states.pop_back();");
writer.WriteLine(" }");
writer.WriteLine(" goto start;");
writer.WriteLine(" break;");
writer.WriteLine(" }");
}
}
}
}
state = state2;
}
foreach (string terminal in grammar.Terminals)
{
if (terminal != "EPSILON")
{
writer.WriteLine(" case "+ states[terminal] + ": // " + terminal);
writer.WriteLine(" {");
writer.WriteLine(" parse"+ terminal + "(token);");
writer.WriteLine(" if (_states.size() == 0)");
writer.WriteLine(" {");
writer.WriteLine(" _currentState = 0;");
writer.WriteLine(" }");
writer.WriteLine(" else");
writer.WriteLine(" {");
writer.WriteLine(" _currentState = _states.back();");
writer.WriteLine(" _states.pop_back();");
writer.WriteLine(" }");
writer.WriteLine(" break;");
writer.WriteLine(" }");
}
}
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" std::stringstream stream;");
writer.WriteLine(" stream << __FILE__ << \" \" << __LINE__ << \" \" << \"Invalid parser state.\";");
writer.WriteLine(" throw stream.str();");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine("");
foreach (string nspace in namespaces)
{
writer.WriteLine("}");
}
}
public static void Generate(string name, string nspace, Bamboo.Parsing.Grammars.Grammar grammar, System.IO.TextWriter writer)
{
writer.WriteLine("//");
writer.WriteLine("// AUTOGENERATED " + System.DateTime.Now + "");
writer.WriteLine("//");
writer.WriteLine("using System;");
writer.WriteLine("");
writer.WriteLine("namespace " + nspace + "");
writer.WriteLine("{");
writer.WriteLine(" public class " + name + "Generator");
writer.WriteLine(" {");
writer.WriteLine("");
writer.WriteLine(" public " + name + "Generator()");
writer.WriteLine(" {");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" public void Generate(" + name + "Node node, System.IO.TextWriter writer)");
writer.WriteLine(" {");
writer.WriteLine(" bool writeWhitespace = false;");
writer.WriteLine("");
writer.WriteLine(" Generate(node, writer, ref writeWhitespace);");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" private void Generate(" + name + "Node node, System.IO.TextWriter writer, ref bool writeWhitespace)");
writer.WriteLine(" {");
writer.WriteLine(" switch(node.Type)");
writer.WriteLine(" {");
foreach (string nonterminal in grammar.Nonterminals)
{
writer.WriteLine(" case " + name + "NodeType." + nonterminal + ":");
writer.WriteLine(" {");
writer.WriteLine(" for(int i = 0; i < node.Nodes.Count; i++)");
writer.WriteLine(" {");
writer.WriteLine(" Generate(node.Nodes[i], writer, ref writeWhitespace);");
writer.WriteLine(" }");
writer.WriteLine(" break;");
writer.WriteLine(" }");
}
foreach (string terminal in grammar.Terminals)
{
writer.WriteLine(" case " + name + "NodeType." + terminal + ":");
writer.WriteLine(" {");
writer.WriteLine(" if(writeWhitespace)");
writer.WriteLine(" {");
writer.WriteLine(" writer.Write(\" \");");
writer.WriteLine(" }");
writer.WriteLine(" writer.Write(node.Value);");
writer.WriteLine(" writeWhitespace = true;");
writer.WriteLine(" break;");
writer.WriteLine(" }");
}
writer.WriteLine(" default:");
writer.WriteLine(" {");
writer.WriteLine(" throw new System.Exception(\"Invalid node type.\");");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine(" }");
writer.WriteLine("");
writer.WriteLine(" }");
writer.WriteLine("}");
}
