private NaleNode statement0() throws JmoException {
Token t = buf.findValid();
if (t == null) {
return null;
}
if (t.getType() == TokenType.IF) {
buf.takeToken();
Token tx = buf.findValid();
this.expectNotNull(tx);
NaleNode nq;
if (tx.getType() == TokenType.TRUE) {
nq = new BooleanNode(true, tx.getPosition());
buf.takeToken();
} else if (tx.getType() == TokenType.FALSE) {
nq = new BooleanNode(false, tx.getPosition());
buf.takeToken();
} else {
nq = parseVariable();
}
this.expectLineEnd();
return new IFNode(nq, t.getPosition());
} else if (t.getType() == TokenType.FI) {
NaleNode node = new IFEndNode(t.getPosition());
buf.takeToken();
expectEnd();
return node;
} else if (t.getType() == TokenType.DEBUG) {
buf.takeToken();
expectEnd();
return new DebuggerNode(t.getPosition());
} else if (t.getType() == TokenType.EXPORT) {
buf.takeToken();
NaleNode nn = statement();
if (nn instanceof VarNode) {
VarNode vn = (VarNode) nn;
if (vn.getParNode() != null) {
throw new ParseException("can not export varNode with member:" + vn, t.getPosition());
}
return new ExpNode(t.getPosition(), (VarNode) nn);
} else if (nn instanceof AssignableNode) {
return new ExpNode(t.getPosition(), (AssignableNode) nn);
} else {
throw new ParseException("can not export non-varNode! " + nn, t.getPosition());
}
} else if (t.getType() == TokenType.echo) {
buf.takeToken();
Token n = buf.findValid();
this.expectNotNull(n);
NaleNode node = regexNode(t.getPosition());
return new EchoNode(node, t.getPosition());
} else {
return statement();
}
}
protected NaleNode parseVariable() throws JmoException {
VarNode varNode = varNode();
while (true) {
Token t = buf.findValid();
if (t == null) {
return varNode;
}
if (t.getType() == TokenType.LPAREN) { // function
expectValid(TokenType.LPAREN);
List<ReferNode> paras = funcParasNode();
expectValid(TokenType.RPAREN);
FunctionCallNode fncN =
new FunctionCallNode(
t.getPosition(), varNode.getParNode(), varNode.getVarName(), paras);
expectLineEnd();
return fncN;
} else if (t.getType() == TokenType.DOT) {
buf.takeToken();
VarNode varsub = varNode();
varNode = new VarNode(varNode.getPosition(), varNode, varsub.getVarName());
} else {
return varNode;
}
}
}