private static void Main(string[] args)
{
try
{
string filename;
string text;
string log;
if (GPCG.ProcessOptions(args, out filename, out text, out log))
{
using (TextWriter textWriter = (text != null) ? File.CreateText(text) : Console.Out)
{
Parser parser = new Parser();
Grammar grammar = parser.Parse(filename);
LALRGenerator lALRGenerator = new LALRGenerator(grammar);
List<State> states = lALRGenerator.BuildStates();
lALRGenerator.ComputeLookAhead();
lALRGenerator.BuildParseTable();
if (GPCG.REPORT)
{
lALRGenerator.Report(log);
}
CodeGenerator codeGenerator = new CodeGenerator(textWriter);
codeGenerator.Generate(states, grammar);
}
}
}
catch (Scanner.ParseException ex)
{
Console.Error.WriteLine("Parse error (line {0}, column {1}): {2}", ex.line, ex.column, ex.Message);
}
catch (Exception ex2)
{
Console.Error.WriteLine("Unexpected Error {0}", ex2.Message);
Console.Error.WriteLine("Please report to [email protected]");
}
}
private static void Main(string[] args)
{
try
{
string filename = ProcessOptions(args);
if (filename == null)
return;
Parser parser = new Parser();
Grammar grammar = parser.Parse(filename);
LALRGenerator generator = new LALRGenerator(grammar);
List<State> states = generator.BuildStates();
generator.ComputeLookAhead();
generator.BuildParseTable();
if (!grammar.CheckGrammar())
throw new Exception("Non-terminating grammar");
if (REPORT)
generator.Report();
else
{
CodeGenerator code = new CodeGenerator();
code.Generate(states, grammar);
}
}
catch (Scanner.ParseException e)
{
Console.Error.WriteLine("Parse error (line {0}, column {1}): {2}", e.line, e.column, e.Message);
}
catch (System.Exception e)
{
Console.Error.WriteLine("Unexpected Error {0}", e.Message);
}
}
private static void Main(string[] args)
{
try
{
string filename = ProcessOptions(args);
if (filename == null)
return;
Assembly assm = Assembly.GetExecutingAssembly();
object info = Attribute.GetCustomAttribute(assm, typeof(AssemblyInformationalVersionAttribute));
versionInfo = ((AssemblyInformationalVersionAttribute)info).InformationalVersion;
Parser parser = new Parser();
Grammar grammar = parser.Parse(filename);
LALRGenerator generator = new LALRGenerator(grammar);
List<State> states = generator.BuildStates();
generator.ComputeLookAhead();
generator.BuildParseTable();
if (!grammar.CheckGrammar())
throw new Exception("Non-terminating grammar");
if (REPORT)
generator.Report();
else
{
CodeGenerator code = new CodeGenerator();
code.Generate(states, grammar);
}
}
catch (Scanner.ParseException e)
{
Console.Error.WriteLine("Parse error (line {0}, column {1}): {2}", e.line, e.column, e.Message);
}
catch (System.Exception e)
{
Console.Error.WriteLine("Unexpected Error {0}", e.Message);
}
}
public void GenerateCode(CodeGenerator codeGenerator)
{
int i = 0;
string lineTag = "";
if (commands.StartsWith("#line")) {
lineTag = commands.Substring(0, commands.IndexOf('"')).Trim();
}
while (i < commands.Length)
{
switch (commands[i])
{
case '/':
Output(i++);
if (commands[i] == '/') // C++ style comments
{
while (i < commands.Length && commands[i] != '\n')
Output(i++);
if (i < commands.Length)
Output(i++);
}
else if (commands[i] == '*') // C style comments
{
Output(i++);
do
{
while (i < commands.Length && commands[i] != '*')
Output(i++);
if (i < commands.Length)
Output(i++);
} while (i < commands.Length && commands[i] != '/');
if (i < commands.Length)
Output(i++);
}
break;
case '"': // start of string literal
Output(i++);
while (i < commands.Length && commands[i] != '"')
{
if (commands[i] == '\\')
Output(i++);
if (i < commands.Length)
Output(i++);
}
if (i < commands.Length)
Output(i++);
break;
case '@':
// Possible start of verbatim string literal
// but also possible location marker access
if (i + 1 < commands.Length)
{
char la = commands[i + 1]; // lookahead character
if (la == '$')
{
i += 2; // read past '@', '$'
Console.Write("yyloc");
}
else if (Char.IsDigit(la))
{
int num = (int)la - (int)'0';
i += 2; // read past '@', digit
if (i < commands.Length && char.IsDigit(commands[i]))
ErrReport(lineTag, "Only indexes up \"$9\" allowed");
else if (num > this.production.rhs.Count)
ErrReport(lineTag, String.Format("Index @{0} is out of bounds", num));
Console.Write("GetLocation({0})", pos - num + 1);
}
else
{
Output(i++);
if (la == '"')
{
Output(i++);
while (i < commands.Length && commands[i] != '"')
Output(i++);
if (i < commands.Length)
Output(i++);
break;
}
}
}
else
ErrReport(lineTag, "Invalid use of '@'");
break;
case '\'': // start of char literal
Output(i++);
while (i < commands.Length && commands[i] != '\'')
{
if (commands[i] == '\\')
Output(i++);
if (i < commands.Length)
Output(i++);
}
if (i < commands.Length)
Output(i++);
break;
case '$': // $$ or $n placeholder
i++;
if (i < commands.Length)
{
string kind = null;
if (commands[i] == '<') // $<kind>n
{
i++;
StringBuilder builder = new StringBuilder();
while (i < commands.Length && commands[i] != '>')
{
builder.Append(commands[i]);
i++;
}
if (i < commands.Length)
{
i++;
kind = builder.ToString();
}
}
if (commands[i] == '$')
{
i++;
if (kind == null)
kind = production.lhs.kind;
Console.Write("yyval");
if (kind != null)
Console.Write(".{0}", kind);
}
else if (char.IsDigit(commands[i]))
{
int num = commands[i] - '0';
i++;
if (i < commands.Length && char.IsDigit(commands[i]))
ErrReport(lineTag, "Only indexes up \"$9\" allowed");
else if (num > this.production.rhs.Count)
ErrReport(lineTag, String.Format("Index ${0} is out of bounds", num));
if (kind == null)
kind = production.rhs[num - 1].kind;
Console.Write("GetValue({0})", pos - num + 1);
if (kind != null)
Console.Write(".{0}", kind);
}
}
else
ErrReport(lineTag, "Unexpected '$'");
break;
default:
Output(i++);
break;
}
}
Console.WriteLine();
}
private void Output(CodeGenerator codeGenerator, int i)
{
if (this.commands[i] == '\n')
{
codeGenerator.Output.WriteLine();
return;
}
codeGenerator.Output.Write(this.commands[i]);
}
private void ParseItemReference(CodeGenerator codeGenerator, string item, string kind, int line, ref int i)
{
if (this.commands[i] == '$')
{
i++;
if (kind == null)
{
kind = this.production.lhs.kind;
}
codeGenerator.Output.Write(item);
if (!string.IsNullOrEmpty(kind))
{
codeGenerator.Output.Write(".{0}", kind);
return;
}
}
else
{
if (char.IsDigit(this.commands[i]))
{
int num = (int)(this.commands[i] - '0');
i++;
while (i < this.commands.Length && this.commands[i] >= '0' && this.commands[i] <= '9')
{
num = 10 * num + (int)this.commands[i] - 48;
i++;
}
if (num <= 0 || num > this.production.rhs.Count)
{
throw new Scanner.ParseException(line, this.pos, string.Format("Invalid production token number {0}.", num));
}
if (kind == null)
{
kind = this.production.rhs[num - 1].kind;
}
codeGenerator.Output.Write("value_stack.array[value_stack.top-{0}].{1}", this.pos - num + 1, item);
if (!string.IsNullOrEmpty(kind))
{
codeGenerator.Output.Write(".{0}", kind);
return;
}
}
else
{
Console.Error.WriteLine("Unexpected '$' at ({0}:{1})", line, i);
}
}
}
public void GenerateCode(CodeGenerator codeGenerator)
{
int i = 0;
int num = this.startLine;
while (i < this.commands.Length)
{
char c = this.commands[i];
if (c <= '$')
{
if (c == '\n')
{
num++;
this.Output(codeGenerator, i++);
continue;
}
switch (c)
{
case '"':
this.Output(codeGenerator, i++);
while (i < this.commands.Length && this.commands[i] != '"')
{
if (this.commands[i] == '\\')
{
this.Output(codeGenerator, i++);
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
}
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
continue;
}
continue;
case '$':
{
i++;
string kind = this.ParseKind(codeGenerator, num, ref i);
this.ParseItemReference(codeGenerator, "yyval", kind, num, ref i);
continue;
}
}
}
else
{
if (c != '\'')
{
if (c != '/')
{
if (c == '@')
{
if (i + 1 >= this.commands.Length || this.commands[i + 1] != '"')
{
i++;
this.ParseItemReference(codeGenerator, "yypos", "", num, ref i);
continue;
}
this.Output(codeGenerator, i++);
this.Output(codeGenerator, i++);
while (i < this.commands.Length && this.commands[i] != '"')
{
this.Output(codeGenerator, i++);
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
continue;
}
continue;
}
}
else
{
this.Output(codeGenerator, i++);
if (this.commands[i] == '/')
{
while (i < this.commands.Length && this.commands[i] != '\n')
{
this.Output(codeGenerator, i++);
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
continue;
}
continue;
}
else
{
if (this.commands[i] != '*')
{
continue;
}
this.Output(codeGenerator, i++);
while (true)
{
if (i >= this.commands.Length || this.commands[i] == '*')
{
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
}
if (i >= this.commands.Length || this.commands[i] == '/')
{
break;
}
}
else
{
this.Output(codeGenerator, i++);
}
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
continue;
}
continue;
}
}
}
else
{
this.Output(codeGenerator, i++);
while (i < this.commands.Length && this.commands[i] != '\'')
{
if (this.commands[i] == '\\')
{
this.Output(codeGenerator, i++);
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
}
}
if (i < this.commands.Length)
{
this.Output(codeGenerator, i++);
continue;
}
continue;
}
}
this.Output(codeGenerator, i++);
}
codeGenerator.Output.WriteLine();
}
private string ParseKind(CodeGenerator codeGenerator, int line, ref int i)
{
if (this.commands[i] == '<')
{
i++;
StringBuilder stringBuilder = new StringBuilder();
while (i < this.commands.Length && this.commands[i] != '>')
{
stringBuilder.Append(this.commands[i]);
i++;
}
if (i < this.commands.Length)
{
i++;
return stringBuilder.ToString();
}
Console.Error.WriteLine("Expected '>' at ({0}:{1})", line, i);
}
return null;
}
public void GenerateCode(CodeGenerator codeGenerator)
{
int i = 0;
string lineTag = "";
if (commands.StartsWith("#line"))
lineTag = commands.Substring(0, commands.IndexOf('"')).Trim();
int length = commands.Length;
while (i < length)
{
switch (commands[i])
{
case 'Y':
{
int j = i;
do { j++; } while (j < length && char.IsLetter(commands, j));
string substr = commands.Substring(i, j - i);
if (substr.Equals("YYACCEPT"))
{
i = j;
Console.Write("YYAccept()");
}
else if (substr.Equals("YYABORT"))
{
i = j;
Console.Write("YYAbort()");
}
else if (substr.Equals("YYERROR"))
{
i = j;
Console.Write("YYError()");
}
else
Output(i++);
break;
}
case '/':
Output(i++);
if (i < length && commands[i] == '/') // C++ style comments
{
while (i < length && commands[i] != '\n')
Output(i++);
if (i < length)
Output(i++);
}
else if (i < length && commands[i] == '*') // C style comments
{
Output(i++);
do
{
while (i < length && commands[i] != '*')
Output(i++);
if (i < length)
Output(i++);
} while (i < length && commands[i] != '/');
if (i < length)
Output(i++);
}
break;
case '"': // start of string literal
Output(i++);
while (i < length && commands[i] != '"')
{
if (commands[i] == '\\')
Output(i++);
if (i < length)
Output(i++);
}
if (i < length)
Output(i++);
break;
case '@':
// Possible start of verbatim string literal
// but also possible location marker access
if (i + 1 < length)
{
char la = commands[i + 1]; // lookahead character
if (la == '$')
{
i += 2; // read past '@', '$'
Console.Write("yyloc");
}
else if (Char.IsDigit(la))
{
i++;
int num = (int)commands[i++] - (int)'0';
while (i < length && char.IsDigit(commands[i]))
num = num * 10 + (int)commands[i++] - (int)'0';
if (num > this.production.rhs.Count)
ErrReport(lineTag, String.Format("Index @{0} is out of bounds", num));
Console.Write("location_stack.array[location_stack.top-{0}]", pos - num + 1);
}
else
{
Output(i++);
if (la == '"')
{
Output(i++);
while (i < length && commands[i] != '"')
Output(i++);
if (i < length)
Output(i++);
break;
}
}
}
else
ErrReport(lineTag, "Invalid use of '@'");
break;
case '\'': // start of char literal
Output(i++);
while (i < length && commands[i] != '\'')
{
if (commands[i] == '\\')
Output(i++);
if (i < length)
Output(i++);
}
if (i < length)
Output(i++);
break;
case '$': // $$ or $n placeholder
i++;
if (i < length)
{
string kind = null;
if (commands[i] == '<') // $<kind>n
{
i++;
StringBuilder builder = new StringBuilder();
while (i < length && commands[i] != '>')
{
builder.Append(commands[i]);
i++;
}
if (i < length)
{
i++;
kind = builder.ToString();
}
}
if (commands[i] == '$')
{
i++;
if (kind == null)
kind = production.lhs.kind;
Console.Write("yyval");
if (kind != null)
Console.Write(".{0}", kind);
}
else if (char.IsDigit(commands[i]))
{
int num = (int)commands[i++] - (int)'0';
while (i < length && char.IsDigit(commands[i]))
num = num * 10 + (int)commands[i++] - (int)'0';
if (num > this.production.rhs.Count)
ErrReport(lineTag, String.Format("Index ${0} is out of bounds", num));
if (kind == null)
kind = production.rhs[num - 1].kind;
Console.Write("value_stack.array[value_stack.top-{0}]", pos - num + 1);
if (kind != null)
Console.Write(".{0}", kind);
}
}
else
ErrReport(lineTag, "Unexpected '$'");
break;
default:
Output(i++);
break;
}
}
Console.WriteLine();
}