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-- File: Standard_Failure.cdl
-- Created: Thu Sep 5 17:21:09 1991
-- Author: Philippe COICADAN
-- <phc@topsn1>
-- Revised J.P. TIRAULT
-- New organization of standard Package (August 1992)
--
---Copyright: Matra Datavision 1991, 1992
class Failure from Standard inherits Transient from Standard
---Purpose:
-- Forms the root of the entire exception hierarchy.
uses
CString from Standard,
OStream from Standard,
SStream from Standard
raises
NoSuchObject from Standard
is
Create returns mutable Failure;
---Purpose:
-- Creates a status object of type "Failure".
---Level: Advanced
---C++: alias "Standard_EXPORT Standard_Failure (const Standard_Failure& f);"
Create (aString: CString) returns mutable Failure;
---Purpose:
-- Creates a status object of type "Failure".
---Level: Advanced
---C++: alias "Standard_EXPORT Standard_Failure& operator= (const Standard_Failure& f);"
Destroy(me:mutable);
---Level: Advanced
---C++: alias ~
Print (me; s: in out OStream);
---Purpose:
-- Prints on the stream <s> the exception name followed by
-- the error message.
-- Level: Advanced
-- Warning:
-- The operator "OStream& operator<< (Standard_OStream&,
-- Handle(Standard_Failure)&)"
-- is implemented. (This operator uses the method Print)
--
---C++: alias operator<<
GetMessageString (me) returns CString from Standard;
---Purpose: Returns error message
---C++: inline
SetMessageString (me: mutable; aMessage: CString);
---Purpose: Sets error message
Reraise (me: mutable);
Reraise (me: mutable; aMessage: CString);
Reraise (me: mutable; aReason: SStream);
---Purpose: Reraises a caught exception and changes its error message.
---Level: Advanced
Raise (myclass; aMessage: CString = "") ;
---Purpose: Raises an exception of type "Failure" and associates
-- an error message to it. The message can be printed
-- in an exception handler.
---Level: Advanced
Raise (myclass; aReason: SStream) ;
---Purpose: Raises an exception of type "Failure" and associates
-- an error message to it. The message can be constructed
-- at run-time.
---Level: Advanced
NewInstance(myclass; aMessage: CString) returns mutable Failure;
---Purpose: Used to construct an instance of the exception object
-- as a handle. Shall be used to protect against possible
-- construction of exception object in C stack -- that is
-- dangerous since some of methods require that object
-- was allocated dynamically.
Jump (me);
---Purpose: Used to throw CASCADE exception from C signal handler.
-- On platforms that do not allow throwing C++ exceptions
-- from this handler (e.g. Linux), uses longjump to get to
-- the current active signal handler, and only then is
-- converted to C++ exception.
---Level: Advanced, not for regular use
Caught (myclass) returns mutable Failure raises NoSuchObject;
---Purpose: Returns the last caught exception.
-- Needed when exceptions are emulated by C longjumps,
-- in other cases is also provided for compatibility.
Throw (me) is virtual protected;
---Purpose: Used only if standard C++ exceptions are used.
-- Throws exception of the same type as this by C++ throw,
-- and stores current object as last thrown exception,
-- to be accessible by method Caught()
fields
myMessage: CString;
end Failure from Standard;
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