/// <summary>
/// Constructs a new <see cref="ByteCodeWriter"/> instance.
/// </summary>
/// <param name="lexer">The <see cref="LexicalAnalyzer"/> being used to parse
/// the program.</param>
public ByteCodeWriter(LexicalAnalyzer lexer)
{
// Bytecode size must not change (won't be able to read saved compiled data)
Debug.Assert(sizeof(ByteCode) == sizeof(Int32));
ByteCodeEntries = new List <ByteCodeEntry>();
Counters = new List <int>();
Lexer = lexer ?? throw new ArgumentNullException(nameof(lexer));
Reset();
}
/// <summary>
/// Constructs a new <see cref="Compiler"/> instance.
/// </summary>
public Compiler()
{
IntrinsicFunctions = new OrderedDictionary <string, IntrinsicFunction>(StringComparer.OrdinalIgnoreCase);
IntrinsicVariables = new OrderedDictionary <string, Variable>(StringComparer.OrdinalIgnoreCase);
MaxErrors = 45;
CreateLogFile = false;
LogFile = null;
EnableLineNumbers = true;
EnableInternalFunctions = true;
Functions = new OrderedDictionary <string, Function>(StringComparer.OrdinalIgnoreCase);
Variables = new OrderedDictionary <string, Variable>(StringComparer.OrdinalIgnoreCase);
Literals = new List <Variable>();
Lexer = new LexicalAnalyzer();
Lexer.Error += Lexer_Error;
Writer = new ByteCodeWriter(Lexer);
Errors = new List <Error>();
}
/// <summary>
/// Constructs a TextParse instance.
/// </summary>
/// <param name="text">Text to be parsed.</param>
public LexicalHelper(LexicalAnalyzer lexer, string?text = null)
{
Lexer = lexer;
Reset(text);
}
public bool Compile(string path, out CompiledProgram program)
{
Functions = new OrderedDictionary <string, Function>(StringComparer.OrdinalIgnoreCase);
Variables = new OrderedDictionary <string, Variable>(StringComparer.OrdinalIgnoreCase);
Literals = new List <Variable>();
Lexer = new LexicalAnalyzer(this);
Lexer.Error += Lexer_Error;
Writer = new ByteCodeWriter(Lexer);
InHeader = true;
CurrentFunction = null;
Errors = new List <Error>();
program = null;
// Add intrinsic functions to function collection
foreach (var function in IntrinsicFunctions.Values)
{
Functions.Add(function.Name, function);
}
// Add intrinsic variables to variable collection
foreach (var pair in IntrinsicVariables.GetKeyValuePairs())
{
Variables.Add(pair.Key, pair.Value);
}
// Add internal functions and variables
if (EnableInternalFunctions)
{
InternalFunctions.AddInternalFunctionsAndVariables(Functions, Variables);
}
try
{
// Load file and initialize lexer
Lexer.Reset(File.ReadAllText(path));
// Write bytecodes to call function main.
// Also causes error if main function is not defined
Writer.Write(ByteCode.ExecFunction, GetFunctionId(Function.Main));
// Parse statements
while (ParseStatement())
{
;
}
// Verify end of file
Token token = Lexer.GetNext();
if (token.Type != TokenType.EndOfFile)
{
Error(ErrorCode.UnexpectedToken, token);
}
// Check for undefined functions
foreach (var funcInfo in Functions.GetKeyValuePairs())
{
if (funcInfo.Value == null)
{
if (funcInfo.Key.Equals(Function.Main, StringComparison.CurrentCultureIgnoreCase))
{
Error(ErrorCode.MainNotDefined, Function.Main.MakeQuoted());
}
else
{
Error(ErrorCode.FunctionNotDefined, funcInfo.Key.MakeQuoted());
}
}
}
}
catch (TooManyErrorsException)
{
// Already handled
}
catch (Exception ex)
{
Error(ErrorCode.InternalError, ex.Message, ErrorLevel.FatalError);
}
// Done if compile failed
if (Errors.Count > 0)
{
return(false);
}
// Implement logging
if (CreateLogFile)
{
Writer.WriteLogFile(path, Path.ChangeExtension(path, "log"));
}
// Return compiled data
program = new CompiledProgram
{
ByteCodes = Writer.GetBytecodes(),
Functions = Functions.Values.Select(f =>
(f is CompileTimeUserFunction userFunction) ? new UserFunction(userFunction) : f).ToArray(),
Variables = Variables.Values.ToArray(),
Literals = Literals.ToArray(),
LineNumbers = EnableLineNumbers ? Writer.GetLineNumbers() : null,
};
return(true);
}
