public SymbolType(SymbolsGen yyp,string name,bool defined)
{
Lexer yyl = yyp.m_lexer;
yyl.yytext = name;
CSymbol s = (new CSymbol(yyp)).Resolve();
m_name = name; m_next=yyp.stypes; yyp.stypes=this;
if (defined)
s.m_defined = true;
}
public SymbolType(SymbolsGen yyp,string name,bool defined)
{
Lexer yyl = yyp.m_lexer;
int p = name.IndexOf("+");
int num = 0;
if (p>0)
{
num = int.Parse(name.Substring(p+1));
if (num> yyp.LastSymbol)
yyp.LastSymbol = num;
name = name.Substring(0,p);
}
yyl.yytext = name;
CSymbol s = new CSymbol(yyp);
if (num>0)
s.m_yynum = num;
s = s.Resolve();
if (defined)
s.m_defined = true;
m_name = name; m_next=yyp.stypes; yyp.stypes=this;
}
// parsing routines
internal void ParseProduction()
{
TOKEN tok = m_tok;
CSymbol lhs = null;
try
{
lhs = ((CSymbol)m_tok).Resolve();
}
catch(Exception e)
{
erh.Error(new CSToolsFatalException(45,tok,string.Format("Syntax error in Parser script - possibly extra semicolon?",e.Message)));
}
m_tok = lhs;
if (m_tok.IsTerminal())
Error(39,m_tok.pos,string.Format("Illegal left hand side <{0}> for production",m_tok.yytext));
if (m_symbols.m_startSymbol==null)
m_symbols.m_startSymbol = lhs;
if (lhs.m_symtype==CSymbol.SymType.unknown)
lhs.m_symtype = CSymbol.SymType.nonterminal;
SymbolType st = (stypes==null)?null:stypes._Find(lhs.yytext);
if (st == null)
st = new SymbolType(this,lhs.yytext);
if ((!lhs.m_defined) && lhs.m_prods.Count==0)
{ // lhs not defined in %symbol statement and not previously a lhs
// so declare it as a new symbol
m_outFile.WriteLine("public class "+lhs.yytext+" : SYMBOL {");
m_outFile.WriteLine(" public "+lhs.yytext+"(Parser yyq):base(yyq) { }");
m_outFile.WriteLine(" public override string yyname { get { return \""+lhs.yytext+"\"; }}");
m_outFile.WriteLine(" public override int yynum { get { return "+lhs.m_yynum+"; }}}");
}
m_prod = new Production(this,lhs);
m_lexer.yy_begin("rhs");
Advance();
if (!m_tok.Matches(":"))
Error(40,m_tok.pos,String.Format("Colon expected for production {0}",lhs.yytext));
Advance();
RhSide(m_prod);
while(m_tok!=null && m_tok.Matches("|"))
{
Advance();
m_prod = new Production(this,lhs);
RhSide(m_prod);
}
if (m_tok==null || !m_tok.Matches(";"))
Error(41,m_lexer.m_pch,"Semicolon expected");
Advance();
m_prod = null;
m_lexer.yy_begin("YYINITIAL");
}
