1
A raise_statement raises an exception.
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raise_statement::= raise;
| raise exception_name [with string_expression];
3
The name, if any, in a raise_statement shall denote an exception. A raise_statement with no exception_name (that is, a re−raise statement) shall be within a handler, but not within a body enclosed by that handler.
3.1/2
The expression, if any, in a raise_statement, is expected to be of type String.
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To raise an exception is to raise a new occurrence of that exception, as explained in 11.4. For the execution of a raise_statement with an exception_name, the named exception is raised. If a string_expression is present, the expression is evaluated and its value is associated with the exception occurrence. For the execution of a re−raise statement, the exception occurrence that caused transfer of control to the innermost enclosing handler is raised again.
5
Examples of raise statements:
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raise Ada.IO_Exceptions.Name_Error; −− see A.13 raise Queue_Error with "Buffer Full"; −− see 9.11
7
raise; −− re−raise the current exception