------- Comment #9 from burnus at gcc dot gnu dot org 2010-08-03 15:33 ------- Created an attachment (id=21377) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21377&action=view) Draft patch (for init-expr char constructors only)
Some notes (all the following is about character strings): * The issue seems to be only initialization expressions (F2003 term; F2008: constant expressions) - for normal assignments the value seems to be correctly converted. * Scalars seem to be OK as well. * To handle are thus: Array constructors and array-valued PARAMETERs a) The attached patch handles structure constructors - including those which have elements which are PARAMETERs b) TODO: Using the following is valid but gives the same ICE than constructors with out the patch: character (len=5), parameter :: str(2) = [ "12345", "67890" ] Type (t) :: tt = t(str) c) ICE/Invalid: The following invalid code segfaults in check_constructor as "str" is not an initialization expression. (Not all constructors need to be, this one does): character (len=5) :: str(2) = [ "12345", "67890" ] Type (t) :: tt = t((/ str /)) d) One could consider warning about truncation (with -Wcharacter-truncation) - if the constructor contains literals which are too long - for parameters (also for those in constructors) the warning becomes useful. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44857
