Silence clang unused variable warnings, disable ndebug

The variables were used in asserts, and asserts were being disabled
by environment variables set in the conda environment I'd used to
install a recent meson.

Author: Will Wray

subprojects/packagefiles/snitch_meson_build.patch

@@ -3,7 +3,6 @@ directory = snitch
 url = https://github.com/cschreib/snitch.git
 revision = main
 depth = 1
-#diff_files = snitch_meson_build.patch
 
 [provide]
 snitch = snitch_dep

subprojects/snitch.wrap

@@ -1,7 +1,7 @@
 test('sanity'
     ,executable('tupl_sanity_test'
                ,'tupl_sanity_test.cpp'
-               ,cpp_args : ['-DNAMESPACE_ID=lml']
+               ,override_options: ['b_ndebug=false']
                ,dependencies: [tupl_dep]
                )
 )
@@ -10,7 +10,7 @@ if codegen.enabled()
 test('amalgam'
     ,executable('tupl_amalgam_test'
                ,'tupl_amalgam_test.cpp'
-               ,cpp_args : ['-DNAMESPACE_ID=lml']
+               ,override_options: ['b_ndebug=false']
                ,dependencies: [tupl_dep, tupl_amalgam_dep]
                )
 )
@@ -20,8 +20,8 @@ if codegen.allowed()
 test('tupl_impl'
     ,executable('tupl_impl'
                ,'tupl_test.cpp'
-               ,cpp_args : ['-DTUPL_IMPL_PREPROCESS'
-                           ,'-DNAMESPACE_ID=lml']
+               ,cpp_args: ['-DTUPL_IMPL_PREPROCESS']
+               ,override_options: ['b_ndebug=false']
                ,dependencies: [tupl_dep]
                ,include_directories: tupl_impl_dir
                )
@@ -31,7 +31,8 @@ endif
 test('tupl'
     ,executable('tests'
                ,'test.cpp'
-               ,cpp_args : ['-DNAMESPACE_ID=']
+               ,cpp_args: ['-DNAMESPACE_ID=']
+               ,override_options: ['b_ndebug=false']
                ,dependencies: [tupl_dep, snitch_dep]
                )
 )

tests/meson.build

@@ -684,6 +684,8 @@ void tupl_swap()
   assert( ta == tA && tb == tB ); // unswapped
 
   auto maptie = map(ta,[](auto&...a){return tie(a...);});
+  assert( &get<0>(maptie) == &get<0>(ta) );
+  maptie = ta;
 
   auto& [a0,a1,a2] = ta;
   auto& [b0,b1,b2] = tb;
@@ -715,6 +717,8 @@ void tupl_swap()
 
   tupl noxt = {'\03'};
   assert( equals(noxt, {3}) );
+  noxt = {4};
+  assert( equals(noxt, {'\04'}) );
   tiea = {1,2L,4};
 };