[antlr-interest] how do i generate an error if input is not fully consumed

[fedot]

I have the following java code (approximately) to go with some 
simple calculator grammar:

MyLexer lexer = new MyLexer(new StringReader(string));
MyParser parser = new MyParser(lexer);
parser.start(); // start variable
System.out.println(parser.getAST().toStringList());

If input string is such that only beginning of it matches lexer and 
parser rules, an AST is properly constructed for the beginning of 
the string and the remainder is silently ignored.

I need to detect such a state (syntactically invalid input remaining 
unconsumed) and "raise an error flag". What are my options?

Thank you in advance!


 

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