public static AST_Imports MakeAST(String in) {
try {
Parser parser = Parser.getInstance(new StringReader(in));
return (AST_Imports) parser.parse("AST_Imports");
} catch (ParseException pe) {
AstNode.fatalError("string-to-ast parse error: " + in);
return null;
}
}
public void compose(AstNode etree) {
// Step 1: do standard checking. etree is of type Ute
if (!(etree instanceof Ute))
AstNode.fatalError(tok[0], "Extension of state machine is not of type UmodSmExt");
UmodSmExt e = (UmodSmExt) etree.arg[0];
kernelConstants.globals().compclass.isBaseAClass = true;
bname = arg[0].tok[0].tokenName();
ename = e.arg[0].tok[0].tokenName();
if (!bname.equals(ename))
AstNode.fatalError(
tok[0], "trying to compose state machines with different names: " + bname + " " + ename);
// Step 2: if the state machine extends another state machine
// then there cannot be a root clause otherwise
// there must be a root clause.
SmExtendsClause ec = (SmExtendsClause) arg[1].arg[0];
if (ec != null && ec instanceof SmExtends) {
// there is an extends clause (i.e., the state machine
// is extending another state machine). This means that
// a root clause is optional. (in future versions,
// root clauses will be mandatory).
} else {
// the state machine is the root of an extension hierarchy.
// it must have a root clause
if (arg[3].arg[0].arg[0] == null)
AstNode.error(tok[0], "state machine " + bname + " must have a root clause");
}
// Step 3: now compose implements clause, and then class body
arg[2].compose(e.arg[1]);
arg[3].compose(e.arg[2]);
}
public void execute(int stage) {
AstNode.fatalError("AstListNode.execute() method should not be called");
}