private void CodeRead(ReadStatement readStatement, List<LocalVariable> locals, List<GlobalVariable> globals, FuncParam[] parameters, ILGenerator il)
{
il.Emit(OpCodes.Call, typeof(Console).GetMethod("ReadLine", new Type[0]));
il.Emit(OpCodes.Call, typeof(Convert).GetMethod("ToInt32", new Type[]{typeof(string)}));
var vname = GetVariableName(readStatement);
if (locals.Any(x => x.Name == vname))
{
var loc = locals.First(x => x.Name == vname);
il.Emit(OpCodes.Stloc, loc.Info);
}
else if (globals.Any(x => x.Name == vname))
{
var glo = globals.First(x => x.Name == vname);
il.Emit(OpCodes.Stsfld, glo.FieldInfo);
}
else
{
var par = parameters.First(x => x.Name == vname);
il.Emit(OpCodes.Starg_S, (byte)par.Index);
}
}
private Statement Smth()
{
Statement st = null;
if (_la == Terminals.Id || _la == Terminals.Num || _la == Terminals.LPar || _la == Terminals.Minus ||
_la == Terminals.Inv)
{
st = Expr();
Expect(Terminals.Semicolon);
}
else if (_la == Terminals.Return)
{
Get();
var r = Expr();
Expect(Terminals.Semicolon);
st = new ReturnStatement(r);
}
else if (_la == Terminals.Read)
{
Get();
var v = Expect(Terminals.Id) as Id;
Expect(Terminals.Semicolon);
st = new ReadStatement(v);
}
else if (_la == Terminals.Write)
{
Get();
var r = Expr();
Expect(Terminals.Semicolon);
st = new WriteStatement(r);
}
else if (_la == Terminals.Writeln)
{
Get();
Expect(Terminals.Semicolon);
st = new WritelnStatement();
}
else if (_la == Terminals.Break)
{
Get();
Expect(Terminals.Semicolon);
st = new BreakStatement();
}
else if (_la == Terminals.If)
{
Get();
Expect(Terminals.LPar);
var c = Expr();
Expect(Terminals.RPar);
var t = Smth();
Expect(Terminals.Else);
var f = Smth();
st = new IfStatement(c, t, f);
}
else if (_la == Terminals.While)
{
Get();
Expect(Terminals.LPar);
var c = Expr();
Expect(Terminals.RPar);
var s = Smth();
st = new WhileStatement(c, s);
}
else if (_la == Terminals.Start)
{
st = Block();
}
else
SynErr(37);
return st;
}
