@Override
public ZNode Invoke(ZNode ParentNode, ZTokenContext TokenContext, ZNode LeftNode) {
@Var ZToken CommandToken = TokenContext.GetToken(ZTokenContext._MoveNext);
@Var
ZNode SymbolNode =
ParentNode.GetNameSpace().GetSymbol(ShellUtils._ToCommandSymbol(CommandToken.GetText()));
if (SymbolNode == null || !(SymbolNode instanceof ZStringNode)) {
return new ZErrorNode(ParentNode, CommandToken, "undefined command symbol");
}
@Var String Command = ((ZStringNode) SymbolNode).StringValue;
@Var CommandNode CommandNode = new CommandNode(ParentNode, CommandToken, Command);
while (TokenContext.HasNext()) {
if (TokenContext.MatchToken("|")) {
// Match Prefix Option
@Var
ZNode PrefixOptionNode =
TokenContext.ParsePatternAfter(
ParentNode,
CommandNode,
PrefixOptionPatternFunction._PatternName,
ZTokenContext._Optional);
if (PrefixOptionNode != null) {
return CommandNode.AppendPipedNextNode((CommandNode) PrefixOptionNode);
}
// Match Command Symbol
@Var
ZNode PipedNode =
TokenContext.ParsePattern(
ParentNode, CommandSymbolPatternFunction._PatternName, ZTokenContext._Required);
if (PipedNode.IsErrorNode()) {
return PipedNode;
}
return CommandNode.AppendPipedNextNode((CommandNode) PipedNode);
}
// Match Redirect
@Var
ZNode RedirectNode =
TokenContext.ParsePattern(
ParentNode, RedirectPatternFunction._PatternName, ZTokenContext._Optional);
if (RedirectNode != null) {
CommandNode.AppendPipedNextNode((CommandNode) RedirectNode);
continue;
}
// Match Suffix Option
@Var
ZNode SuffixOptionNode =
TokenContext.ParsePattern(
ParentNode, SuffixOptionPatternFunction._PatternName, ZTokenContext._Optional);
if (SuffixOptionNode != null) {
if (SuffixOptionNode.IsErrorNode()) {
return SuffixOptionNode;
}
return CommandNode.AppendPipedNextNode((CommandNode) SuffixOptionNode);
}
// Match Argument
@Var
ZNode ArgNode =
TokenContext.ParsePattern(
ParentNode, SimpleArgumentPatternFunction._PatternName, ZTokenContext._Optional);
if (ArgNode == null) {
break;
}
CommandNode.AppendArgNode(ArgNode);
}
return CommandNode;
}
