Thread: If we meet when I come to Paris next year, you can show me your city.

This is more like future conditional: (copied from another site)

"Future Conditionals
Future Real Conditional
FORM

[If / When ... Simple Present ..., ... Simple Future ...]

[... Simple Future ... if / when ... Simple Present ...]

Notice that there is no future in the if- or when-clause.
USE

The Future Real Conditional describes what you think you will do in a specific situation in the future. It is different from other Real Conditional forms because, unlike the present or the past, you do not know what will happen in the future. Although this form is called "real", you are usually imagining or guessing about the future. It is called "real" because it is still possible that the action might occur in the future."