🚀 go-pugleaf

Fergus Henderson (fjh@munta.cs.mu.OZ.AU) wrote:

: The doubt about whether or not &"abc" is legal is due to the fact
: that the draft C++ standard doesn't specify whether a string literal
: is an lvalue or not.  Since the C standard does specify this - it
: specifies that a string literal *is* an lvalue - I would expect the
: eventual C++ standard to follow the C standard.  &"abc" is legal C,
: and I expect it will be legal C++.


If "abc" isn't an lvalue, then sizeof("abc") is also illegal -- there
are no rvalues of type char-array, and array-to-pointer conversion is
supressed in this context, per 5.3.3:

  4  The lvalue-to-rvalue, array-to-pointer,  and 
     function-to-pointer standard conversions are 
     suppressed on the operand of sizeof.

Visibly, string literals must be lvalues for compatibility with C.


Tom Payne (thp@cs.ucr.edu)





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