[Ada] Reject junk expressions in attribute Update

Pierre-Marie de Rodat derodat@adacore.com
Fri Jun 19 08:28:33 GMT 2020


Attribute Update only makes sense with named component associations. The
positional component associations were silently ignored by both
analysis, resolution and expansion; now they are rejected as illegal.

Tested on x86_64-pc-linux-gnu, committed on trunk

2020-06-19  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

	* sem_attr.adb (Analyze_Attribute): Reject illegal positional
	component associations; fix syntax in comment about named
	component associations.
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