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    <p>If "123abc" is an invalid token then you should handle it as soon as you spot it since it's directly related to the way tokens are defined, <em>not</em> how they interact with each other (which would be the lexer's job). It's an orthographic error rather than a grammar-related one.</p> <p>There are multiple ways to go about it:</p> <ul> <li><p>You could abort the parsing and just throw some exception, leaving the caller with no tokens or just the tokens you had successfully parsed until then. This will save you any "recovery" logic and might be enough for your use case. Although, if you're parsing stuff for syntax highlighting for instance, this would probably not be sufficient as you don't want all of the remaining code to look unparsed.</p> <p>Example: A conforming XML parser could use this for fatal errors if there's no need to handle malformed markup, just spit out a basic error and quit.</p></li> <li><p>Alternatively, you could insert an "error" token with proper metadata about the nature of the error and skip ahead to the next valid token.</p> <p>You might need to have heuristics in your lexer to handle the error token gracefully and find how to interpret further tokens when an error token is found inside an nested expression (like, should you consider the expression has ended? look for a closing token? etc.).</p> <p>Anyway, this approach will allow for error tokens to be used to display precise info about the location and nature of errors encountered (think inline error reporting in a GUI).</p></li> </ul>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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