Q241706: BUG: Compiler Error C2143 on Function-Try-Block Syntax

Article: Q241706
Product(s): Microsoft C Compiler
Version(s): winnt:6.0
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbLangCPP kbVC600 kbVC600bug
Last Modified: 03-MAY-2001

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The information in this article applies to:

- The C/C++ Compiler (CL.EXE), included with:
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, version 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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SYMPTOMS
========

The following error messages may appear if you try to use the function-try-block
syntax.

  error C2143: syntax error : missing ';' before 'try'
  error C2143: syntax error : missing ';' before 'try'
  error C2065: 'ii' : undeclared identifier
  error C2143: syntax error : missing ';' before 'try'
  error C2448: 'Unknown' : function-style initializer appears to be a function
  definition
  error C2143: syntax error : missing ';' before 'catch'
  error C2143: syntax error : missing ';' before '{'
  error C2447: missing function header (old-style formal list?)

CAUSE
=====

The compiler does not support the function-try-block syntax as specified in the
C++ Standard (section 15) quoted below:

  -3- A function-try-block associates a handler-seq with the ctor-initializer,
  if present, and the function-body. An exception thrown during the execution
  of the initializer expressions in the ctor-initializer or during the
  execution of the function-body transfers control to a handler in a
  function-try-block in the same way as an exception thrown during the
  execution of a try-block transfers control to other handler.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

The following code example demonstrates the error:

  //test.cpp
  // compiler option needed: /GX
  int f(int);
  class C {
  	int i;
  public:
  	C(int);
  };

  C::C(int ii)
  try
  : i(f(ii))
  {
  	//  constructor function body
  }
  catch (...)
  {
  	//  handles exceptions thrown from the ctor-initializer
  	//  and from the constructor function body
  }

Additional query words:

======================================================================
Keywords          : kbCompiler kbCPPonly kbLangCPP kbVC600 kbVC600bug 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : winnt:6.0
Issue type        : kbbug

=============================================================================

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