public override Block CompileNewState(Runtime runtime,
StateForCompiler state)
{
ParserBlock block = new ParserBlock(runtime);
block.Comment("start of pattern --------------------");
if (simple)
{
block.Emit(pattern.CompileCall(runtime, state));
}
else
{
BlockLabel returnLabel = new BlockLabel("return");
block.BeginScope();
BlockLocal patternLocal = new BlockLocal(typeof(Pattern));
block.DeclareLocal(patternLocal);
block.Load(pattern);
block.StoreLocal(patternLocal);
block.LoadState();
block.GetProperty(typeof(ParserState).GetProperty("LeftHandSide"));
BlockLabel parseNew = new BlockLabel("parseNew");
block.BranchIfNull(parseNew);
block.LoadState();
block.GetProperty(typeof(ParserState).GetProperty("LeftHandSide"));
block.GetProperty(typeof(ParseTree).GetProperty("Value"));
block.Call(typeof(object).GetMethod("GetType"));
BlockLocal leftType = new BlockLocal(typeof(Type));
block.DeclareLocal(leftType);
block.Dup();
block.StoreLocal(leftType);
block.LoadLocal(patternLocal);
block.GetProperty(typeof(Pattern).GetProperty("Type"));
BlockLocal patternType = new BlockLocal(typeof(Type));
block.DeclareLocal(patternType);
block.Dup();
block.StoreLocal(patternType);
BlockLabel recurse = new BlockLabel("recurse");
block.BranchIfEqual(recurse);
block.LoadLocal(leftType);
block.LoadLocal(patternType);
block.Call(typeof(Type).GetMethod("IsSubclassOf"));
block.BranchIfTrue(recurse);
block.Branch(parseNew);
block.MarkLabel(recurse);
block.Single("left hand side from recursion");
block.LoadLexer();
block.LoadState();
block.GetProperty(typeof(ParserState).GetProperty("LeftHandSideEndPos"));
block.SetProperty(typeof(Lexer).GetProperty("Position"));
block.LoadState();
block.GetProperty(typeof(ParserState).GetProperty("LeftHandSide"));
block.Branch(returnLabel);
block.MarkLabel(parseNew);
block.Emit(pattern.CompileCall(runtime, state));
block.MarkLabel(returnLabel);
block.EndScope();
}
block.Comment("end of pattern ---------------------");
return(block);
}