clang warning:
../../util/options.hh:72:13: warning: destination for this 'memset' call is a pointer to dynamic class
'option_parser_t'; vtable pointer will be overwritten [-Wdynamic-class-memaccess]
memset (this, 0, sizeof (*this));
~~~~~~ ^
../../util/options.hh:72:13: note: explicitly cast the pointer to silence this warning
memset (this, 0, sizeof (*this));
^
(void*)
Sure, gcc knows to warn about this as well:
../../util/options.cc:175:17: warning: this statement may fall through [-Wimplicit-fallthrough=]
case 1: m.r = m.t;
~~~~^~~~~
../../util/options.cc:176:5: note: here
case 2: m.b = m.t;
^~~~
But HOLY SMOKES, look at clang -Weverything bot message:
options.cc:176:5: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
case 2: m.b = m.t;
^
options.cc:176:5: note: insert 'HB_FALLTHROUGH;' to silence this warning
case 2: m.b = m.t;
^
HB_FALLTHROUGH;
Right, it's telling me to insert "HB_FALLTHROUGH;" there!!!!!!!!!
From clang -Weverything bot:
options.cc:39:3: warning: no previous extern declaration for non-static variable 'supported_font_funcs' [-Wmissing-variable-declarations]
Alternative woul have been to resurrect F_COMBINE that I removed in
70136a78cb
But this does it for now. I'm not sure why check-static-inits.sh didn't
catch this before. Clang -Weverything bot did:
CXX libharfbuzz_la-hb-ot-shape-complex-indic.lo
hb-ot-shape-complex-indic.cc:99:1: warning: declaration requires a global constructor [-Wglobal-constructors]
indic_features[] =
^
1 warning generated.
CXX libharfbuzz_la-hb-ot-shape-complex-khmer.lo
hb-ot-shape-complex-khmer.cc:36:1: warning: declaration requires a global constructor [-Wglobal-constructors]
khmer_features[] =
^
1 warning generated.
uint32_t was getting promoted to signed int, which is not what we wanted...
Wow, clang has become good at generating warnings...
../../src/hb-common.h:349:29: warning: signed shift result (0xFF000000) sets the sign bit of the shift expression's type ('int') and becomes negative [-Wshift-sign-overflow]
_HB_SCRIPT_MAX_VALUE = HB_TAG_MAX, /*< skip >*/
^~~~~~~~~~
../../src/hb-common.h:93:20: note: expanded from macro 'HB_TAG_MAX'
define HB_TAG_MAX HB_TAG(0xff,0xff,0xff,0xff)
^~~~~~~~~~~~~~~~~~~~~~~~~~~
../../src/hb-common.h:89:57: note: expanded from macro 'HB_TAG'
define HB_TAG(c1,c2,c3,c4) ((hb_tag_t)((((uint8_t)(c1))<<24)|(((uint8_t)(c2))<<16)|(((uint8_t)(c3))<<8)|((uint8_t)(c4))))
~~~~~~~~~~~~~~~^ ~~
../../src/hb-common.h:349:3: warning: ISO C restricts enumerator values to range of 'int' (4294967295 is too large) [-Wpedantic]
_HB_SCRIPT_MAX_VALUE = HB_TAG_MAX, /*< skip >*/
^ ~~~~~~~~~~
text-rendering-tests test MORX-32 shows that for Insertion, an unset mark is treated
as mark set at 0. This is unlike the Reordering lookup where un unset mark performs
nothing.
Fixes MORX-32.
Ebrahim Byagowi
Behdad Esfahbod
Volker Krause