Mercurial > octave
diff libinterp/corefcn/oct-lvalue.cc @ 20248:011a364b4d78
improve compatibility of indexed assignment (bug #43813)
* oct-lvalue.h, oct-lvalue.cc (octave_lvalue::index_type,
octave_lvalue::index_is_empty): New functions.
* pt-assign.cc (tree_multi_assignment::rvalue): For expressions like
[lhs{:}] = fcn (args) with LHS undefined, and in which FCN produces an
output given nargout equal to zero, convert LHS to a one-element cell
array indexed by 1.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Fri, 05 Jun 2015 15:51:04 -0400 |
| parents | 4197fc428c7d |
| children | 48b2ad5ee801 |
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--- a/libinterp/corefcn/oct-lvalue.cc Wed Jun 03 14:16:43 2015 -0700 +++ b/libinterp/corefcn/oct-lvalue.cc Fri Jun 05 15:51:04 2015 -0400 @@ -54,6 +54,21 @@ error ("invalid index expression in assignment"); } +bool +octave_lvalue::index_is_empty (void) const +{ + bool retval = false; + + if (idx.size () == 1) + { + octave_value_list tmp = idx.front (); + + retval = (tmp.length () == 1 && tmp(0).is_empty ()); + } + + return retval; +} + void octave_lvalue::do_unary_op (octave_value::unary_op op) {