2009-07-07  Robert Dewar  <dewar@adacore.com>

	* scng.adb: Minor reformattting

	* par-ch2.adb (Scan_Pragma_Argument_Association): Pragma argument
	association allows conditional expression without parens.

	* par-ch4.adb (P_Name): Attribute arguments can be conditional
	expressions without enclosing parentheses, and also as parameters,
	indexing expressions etc.
	(P_Conditional_Expression): New procedure
	(P_Expression_If_OK): New procedure

	* par.adb (P_Conditional_Expression): New procedure
	(P_Expression_If_OK): New procedure

	* sem_ch4.adb (Analyze_Conditional_Expression): Allow for two argument
	form of conditional expression.

	* sem_res.adb (Resolve_Conditional_Expression): Deal with supplying
	missing True argument if ELSE argument missing.

	* sinfo.adb (Is_Elsif): New flag

	* sinfo.ads (N_Conditional_Expression): This node is now a syntactic
	part of the language, and the documentation is modified accordingly.
	(Is_Elsif): New flag

From-SVN: r149316