private Expression parseRangeExpression() {
    Expression ge = new GreaterOrEqual(parseVersion());
    consumeNextToken(HYPHEN);
    Expression le = new LessOrEqual(parseVersion());
    return new And(ge, le);
  }
private Expression parseRangeExpression ( ) { Expression ge = new GreaterOrEqual ( parseVersion ( ) ) ; consumeNextToken ( HYPHEN ) ; Expression le = new LessOrEqual ( parseVersion ( ) ) ; return new And ( ge , le ) ; }
Parses the {@literal <range-expr>} non-terminal.

<pre>
{@literal
<range-expr> ::= <version> "-" <version>
}
</pre>

@return the expression AST