Ada Reference Manual (Ada 2022) — Legal Information
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9.7 Select Statements

1
There are four forms of the select_statement. One form provides a selective wait for one or more select_alternatives. Two provide timed and conditional entry calls. The fourth provides asynchronous transfer of control. 

Syntax

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select_statement ::= 
   selective_accept
  | timed_entry_call
  | conditional_entry_call
  | asynchronous_select

Examples

3
Example of a select statement: 
4
select
   accept Driver_Awake_Signal;
or
   delay 30.0*Seconds;
   Stop_The_Train;
end select;
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