وَيَجُوزُ أَنْ تَقَعَ بَعْدَهَا الْجُمْلَةُ الِاسْمِيَّةُ، نَحْوُ: «آتِيكَ إِذَا الشَّمْسُ طَالِعَةٌ».
Translation: A nominal clause may follow, e.g. “I shall come to you when the sun is rising.”
A nominal clause may follow idhā in the source’s treatment, although a verbal clause is preferred. Recognize the construction without forcing every nominal example into a simple modern template.
Full parsing: ātīka: imperfect, implicit first-person subject, -ka as object; idhā: future-time adverb; al-shamsu: nominative subject; ṭāliʿatun: nominative predicate. Al-shamsu ṭāliʿatun is the nominal clause following the adverb.