/// <summary>
/// VarDecl -> Type IdentifierList ; VarDecl |
/// FinalT Type IdT = NumT ; VarDecl |
/// ε
/// </summary>
private void VarDecl()
{
if (Token == Tokens.FinalT)
{
Match(Tokens.FinalT);
Type();
TableEntry entry = symbolTable.CreateTableEntry();
VarNames.Add(Lexeme);
Match(Tokens.IdT);
Match(Tokens.AssignOpT);
BpOffsetName = $"_bp-{Offset}";
symbolTable.ConvertEntryToConstant(entry);
Match(Tokens.NumT);
LocalVarsSize += Size;
Offset += Size;
Match(Tokens.SemiT);
VarDecl();
}
else if (Types.Contains(Token))
{
Type();
IdentifierList();
Match(Tokens.SemiT);
VarDecl();
}
}
public void Unpack(BinaryReader reader)
{
Id = reader.ReadUInt32();
var num_varnames = reader.ReadUInt16();
for (uint i = 0; i < num_varnames; i++)
{
VarNames.Add(reader.ReadUnicodeString());
}
var num_vars = reader.ReadUInt16();
for (uint i = 0; i < num_vars; i++)
{
Vars.Add(reader.ReadUnicodeString());
}
var num_strings = reader.ReadUInt32();
for (uint i = 0; i < num_strings; i++)
{
Strings.Add(reader.ReadUnicodeString());
}
var num_comments = reader.ReadUInt32();
for (uint i = 0; i < num_comments; i++)
{
Comments.Add(reader.ReadUInt32());
}
Unknown = reader.ReadByte();
}
/// <summary>
/// IdentifierList -> IdT IdentifierListTail
/// </summary>
private void IdentifierList()
{
if (Token == Tokens.IdT)
{
TableEntry entry = symbolTable.CreateTableEntry();
BpOffsetName = $"_bp-{Offset}";
symbolTable.ConvertEntryToVariable(entry);
VarNames.Add(Lexeme);
LocalVarsSize += Size;
Offset += Size;
Match(Tokens.IdT);
IdentifierListTail();
}
else
{
ErrorHandler.LogError($"expected an identifier, found \"{Lexeme}\"");
}
}
/// <summary>
/// IdentifierListTail -> , IdT IdentifierListTail | ε
/// </summary>
private void IdentifierListTail()
{
if (Token == Tokens.CommaT)
{
Match(Tokens.CommaT);
TableEntry entry = symbolTable.CreateTableEntry();
BpOffsetName = $"_bp-{Offset}";
symbolTable.ConvertEntryToVariable(entry);
VarNames.Add(Lexeme);
LocalVarsSize += Size;
Offset += Size;
Match(Tokens.IdT);
if (Token == Tokens.IdT)
{
ErrorHandler.LogError("expected \",\" before next identifier");
}
IdentifierListTail();
}
}