Add an index page?

It would be nice to have a global index page. The guidelines are pretty difficult to search at the moment. I tried and failed to look up iterator best practices. There is a lot of iterator example code in the guidelines that have little or nothing to do with iterators, making them difficult to search.

In terms of implementing this, I noticed you're embedding some semantic info in A tags in # headers. You could add an attribute to it for tags, e.g.:

## <a name="SS-fct-def" tags="function,lambda,return type,template">F.def: Function definitions

You could then write a remark plugin to generate the actual index.

Start by reviewing the guideline headers and their existing anchor markup, especially the iterator-related sections mentioned in the issue, then inspect how the guidelines are generated to determine where a remark plugin could fit. Done means a global index exists and makes relevant guideline topics, including iterator best practices, easy to find.