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Array with Fully-Bracketed Initializers

Andy Neil

Following on from this discussion:
http://www.8052.com/forum/read.phtml?id=84814


Keil C51 v7.50 rejects the following:

char key_tbl[][] =
{
    {   4,   3,   2,   1 },    // row 0
    {   8,   7,   6,   5 },    // row 1
    {  12,  11,  10,   9 },    // row 2
    {  16,  15,  14,  13 },    // row 3
};
It says:
MAIN.C(27): error C163: 'key_tbl': unknown array size
Since this is a Fully-Bracketed Initializer, shouldn't the compiler be able to deduce the size?

The description of this message in the online help doesn't mention this situation:

"In general, a formal size specifier is not required for external, single, or multi-dimensional arrays. Typically, the compiler calculates the size at initialization time. For external arrays, the size is of no great interest. This error is the result of attempting to use the sizeof operator on an undimensioned array or on a multi-dimensional array with undefined element sizes."

Parents
  • 0 in reply to Andy Neil

    <quote>
    "Out of 'The C programming language' section A8.6.2"

    Which edition of the book is that?
    Mine's the 2nd Edition, marked "Based on Draft-Proposed ANSI C," and contains that very paragraph.

    However, The ISO/IEC 9899:1990 standard doesn't - that's where all the stuff about fully-bracketed initialisers comes from
    (Section 6.5.7).
    </quote>

    My copy is Second Edition -- ANSI C.
    As others have mentioned I don't see where KEIL says which ANSI C standard they are trying to meet. I've always assumed ANSI-83 ( 83 is the 1st one isn't it? ).

    :-)
    Frodak

Reply
  • 0 in reply to Andy Neil

    <quote>
    "Out of 'The C programming language' section A8.6.2"

    Which edition of the book is that?
    Mine's the 2nd Edition, marked "Based on Draft-Proposed ANSI C," and contains that very paragraph.

    However, The ISO/IEC 9899:1990 standard doesn't - that's where all the stuff about fully-bracketed initialisers comes from
    (Section 6.5.7).
    </quote>

    My copy is Second Edition -- ANSI C.
    As others have mentioned I don't see where KEIL says which ANSI C standard they are trying to meet. I've always assumed ANSI-83 ( 83 is the 1st one isn't it? ).

    :-)
    Frodak

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