[PATCH v4 0/2] [gdb/exp] Fix ignoring of incorrect namespace prefix

[Tom de Vries <tdevries@suse.de>]

Hafiz Abid Qadeer reported a problem with namespace handling using a Fortran
program [1].  I wrote an equivalent program in C++, and reproduced the
reported problem with both.  While investigating the problem, I ran into
another problem, for which I filed PR34051.

This series contains two patches.

The first patch refactors a complex assignment in
cp_lookup_symbol_via_imports.

The second patch fixes PR34051, in that same assignment.

Tested on aarch64-linux.

A v1 was submitted here [2].

Changes in v2 [3]:
- updated type of directive_match to bool

Changes in v3 [4]:
- fixed top-level "return -1" in test-case
- fixed typo in test-case

Changes in v4:
- don't use 1 to set bool
- added approval tag to first patch
- replaced "block->function () != nullptr" with
  "block->function_block () != nullptr" to handle the case that current block
  is not a function block, but nested in one
- extended test-case to exercise nested block scenario

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=34051

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=34034
[2] v1 https://sourceware.org/pipermail/gdb-patches/2026-April/226370.html
[3] v2 https://sourceware.org/pipermail/gdb-patches/2026-April/226375.html
[4] v3 https://sourceware.org/pipermail/gdb-patches/2026-April/226433.html

Tom de Vries (2):
  [gdb] Break up complex assignment in cp_lookup_symbol_via_imports
  [gdb/exp] Fix ignoring of incorrect namespace prefix

 gdb/cp-namespace.c                 | 28 ++++++++---
 gdb/testsuite/gdb.cp/nsusing-2.cc  | 62 ++++++++++++++++++++++++
 gdb/testsuite/gdb.cp/nsusing-2.exp | 75 ++++++++++++++++++++++++++++++
 3 files changed, 158 insertions(+), 7 deletions(-)
 create mode 100644 gdb/testsuite/gdb.cp/nsusing-2.cc
 create mode 100644 gdb/testsuite/gdb.cp/nsusing-2.exp


base-commit: e860660ab60838b786527823d02b298a3dedcf29
-- 
2.51.0