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Fix lambda return type inference #20467

Merged
merged 1 commit into from
Jul 7, 2022
Merged

Fix lambda return type inference #20467

merged 1 commit into from
Jul 7, 2022

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Some compilers (some ARM-based Linux compilers) have difficulty inferring the return type of lambdas that don't explicitly state their return type. This causes issues when passing lambdas as arguments into
functions that expect a specific function signature.

This fixes this specific instance in CASEServer that has this problem:

src/protocols/secure_channel/CASEServer.cpp:165:9: error: no viable conversion from '(lambda at src/protocols/secure_channel/CASEServer.cpp:165:9)' to 'TimerCompleteCallback' (aka 'void (*)(chip::System::Layer *, void *)')
        [](auto * systemLayer, auto * appState) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/protocols/secure_channel/CASEServer.cpp:165:9: note: candidate template ignored: could not match 'type-parameter-0-1 *' against 'void *'
src/system/SystemLayer.h:145:59: note: passing argument to parameter 'aComplete' here
    virtual CHIP_ERROR ScheduleWork(TimerCompleteCallback aComplete, void * aAppState) = 0;
                                                          ^
1 error generated.

@mrjerryjohns @web-flow
Fix lambda return type inference (#20457)
4cae0c7 
Some compilers (some ARM-based Linux compilers) have difficulty
inferring the return type of lambdas that don't explicitly state their
return type. This causes issues when passing lambdas as arguments into
functions that expect a specific function signature.

This fixes this specific instance in CASEServer that has this problem.
@woody-apple woody-apple merged commit fe30b1a into sve Jul 7, 2022
@woody-apple woody-apple deleted the cherry-pick-f1f4d2945218858f36153baf45ba971e1dbcec65 branch July 7, 2022 23:35
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github-actions bot commented Jul 7, 2022 •
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PR #20467: Size comparison from b39e947 to 4cae0c7

Increases (2 builds for mbed, telink)
platform target config section b39e947 4cae0c7 change % change
mbed lock-app CY8CPROTO_062_4343W+release (read/write) 2447424 2447488 64 0.0
.text 1410068 1410132 64 0.0
telink light-switch-app tlsr9518adk80d (read/write) 796628 796636 8 0.0
text 565128 565132 4 0.0
Decreases (2 builds for esp32, k32w)
platform target config section b39e947 4cae0c7 change % change
esp32 all-clusters-app c3devkit (read only) 1019476 1019472 -4 -0.0
.flash.text 1019476 1019472 -4 -0.0
k32w lock k32w061+release (read/write) 684964 684948 -16 -0.0
.text 607180 607164 -16 -0.0
Full report (30 builds for cc13x2_26x2, cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, p6, telink)
platform target config section b39e947 4cae0c7 change % change
cc13x2_26x2 all-clusters-app LP_CC2652R7 (read only) 665651 665651 0 0.0
(read/write) 185572 185572 0 0.0
.bss 74116 74116 0 0.0
.data 3356 3356 0 0.0
.rodata 88067 88067 0 0.0
.text 577268 577268 0 0.0
all-clusters-minimal-app LP_CC2652R7 (read only) 631443 631443 0 0.0
(read/write) 157684 157684 0 0.0
.bss 73412 73412 0 0.0
.data 3356 3356 0 0.0
.rodata 77307 77307 0 0.0
.text 553812 553812 0 0.0
lock-ftd LP_CC2652R7 (read only) 668551 668551 0 0.0
(read/write) 172816 172816 0 0.0
.bss 71148 71148 0 0.0
.data 3280 3280 0 0.0
.rodata 76207 76207 0 0.0
.text 591864 591864 0 0.0
lock-mtd LP_CC2652R7 (read only) 617959 617959 0 0.0
(read/write) 144264 144264 0 0.0
.bss 66868 66868 0 0.0
.data 3280 3280 0 0.0
.rodata 76087 76087 0 0.0
.text 541384 541384 0 0.0
pump-app LP_CC2652R7 (read only) 677703 677703 0 0.0
(read/write) 164512 164512 0 0.0
.bss 71228 71228 0 0.0
.data 3280 3280 0 0.0
.rodata 88431 88431 0 0.0
.text 588788 588788 0 0.0
pump-controller-app LP_CC2652R7 (read only) 663527 663527 0 0.0
(read/write) 178808 178808 0 0.0
.bss 71348 71348 0 0.0
.data 3276 3276 0 0.0
.rodata 84295 84295 0 0.0
.text 578752 578752 0 0.0
shell LP_CC2652R7 (read only) 658150 658150 0 0.0
(read/write) 188576 188576 0 0.0
.bss 76420 76420 0 0.0
.data 3360 3360 0 0.0
.rodata 84846 84846 0 0.0
.text 572988 572988 0 0.0
cyw30739 light cyw930739m2evb_01 (read/write) 579134 579134 0 0.0
.app_xip_area 457904 457904 0 0.0
.bss 64184 64184 0 0.0
.data 716 716 0 0.0
.rodata 0 0 0 0.0
.text 112 112 0 0.0
lock cyw930739m2evb_01 (read/write) 585070 585070 0 0.0
.app_xip_area 459104 459104 0 0.0
.bss 68912 68912 0 0.0
.data 720 720 0 0.0
.rodata 0 0 0 0.0
.text 112 112 0 0.0
ota-requestor-no-progress-logging cyw930739m2evb_01 (read/write) 582206 582206 0 0.0
.app_xip_area 461824 461824 0 0.0
.bss 63392 63392 0 0.0
.data 660 660 0 0.0
.rodata 0 0 0 0.0
.text 112 112 0 0.0
efr32 lighting-app BRD4161A (read/write) 1080652 1080652 0 0.0
.bss 132996 132996 0 0.0
.data 2048 2048 0 0.0
.text 945588 945588 0 0.0
BRD4161A+rpc (read only) 983040 983040 0 0.0
(read/write) 151948 151948 0 0.0
.bss 149676 149676 0 0.0
.data 2260 2260 0 0.0
.text 983032 983032 0 0.0
BRD4161A+rs911x (read/write) 946756 946756 0 0.0
.bss 140768 140768 0 0.0
.data 2048 2048 0 0.0
.text 803920 803920 0 0.0
lock-app BRD4161A+wf200 (read/write) 1127960 1127960 0 0.0
.bss 144184 144184 0 0.0
.data 2060 2060 0 0.0
.text 981692 981692 0 0.0
window-app BRD4161A (read/write) 1074436 1074436 0 0.0
.bss 134468 134468 0 0.0
.data 2076 2076 0 0.0
.text 937868 937868 0 0.0
esp32 all-clusters-app c3devkit (read only) 1019476 1019472 -4 -0.0
(read/write) 1485458 1485458 0 0.0
.dram0.bss 70080 70080 0 0.0
.dram0.data 14600 14600 0 0.0
.flash.rodata 215344 215344 0 0.0
.flash.text 1019476 1019472 -4 -0.0
.iram0.text 62902 62902 0 0.0
m5stack (read only) 1073383 1073383 0 0.0
(read/write) 487536 487536 0 0.0
.dram0.bss 75600 75600 0 0.0
.dram0.data 34144 34144 0 0.0
.flash.rodata 245796 245796 0 0.0
.flash.text 1067999 1067999 0 0.0
.iram0.text 123267 123267 0 0.0
k32w light k32w061+release (read/write) 658192 658192 0 0.0
.bss 69516 69516 0 0.0
.data 1992 1992 0 0.0
.text 580884 580884 0 0.0
lock k32w061+release (read/write) 684964 684948 -16 -0.0
.bss 69980 69980 0 0.0
.data 2004 2004 0 0.0
.text 607180 607164 -16 -0.0
linux chip-tool-no-interactive-ipv6only arm64 (read only) 9986740 9986740 0 0.0
(read/write) 683569 683569 0 0.0
.bss 42609 42609 0 0.0
.data 1152 1152 0 0.0
.data.rel.ro 622480 622480 0 0.0
.dynamic 528 528 0 0.0
.got 13512 13512 0 0.0
.init 24 24 0 0.0
.init_array 192 192 0 0.0
.rodata 475828 475828 0 0.0
.text 7952564 7952564 0 0.0
thermostat-no-ble arm64 (read only) 2592644 2592644 0 0.0
(read/write) 158289 158289 0 0.0
.bss 65249 65249 0 0.0
.data 1704 1704 0 0.0
.data.rel.ro 83240 83240 0 0.0
.dynamic 528 528 0 0.0
.got 5072 5072 0 0.0
.init 24 24 0 0.0
.init_array 400 400 0 0.0
.rodata 165348 165348 0 0.0
.text 2187520 2187520 0 0.0
mbed lock-app CY8CPROTO_062_4343W+release (read only) 6224 6224 0 0.0
(read/write) 2447424 2447488 64 0.0
.bss 213940 213940 0 0.0
.data 5872 5872 0 0.0
.text 1410068 1410132 64 0.0
nrfconnect all-clusters-app nrf52840dk_nrf52840 (read/write) 1174495 1174495 0 0.0
bss 142900 142900 0 0.0
rodata 141776 141776 0 0.0
text 810916 810916 0 0.0
all-clusters-minimal-app nrf52840dk_nrf52840 (read/write) 1154691 1154691 0 0.0
bss 142136 142136 0 0.0
rodata 133308 133308 0 0.0
text 800360 800360 0 0.0
p6 all-clusters-app default (read/write) 2563896 2563896 0 0.0
.bss 149120 149120 0 0.0
.data 2776 2776 0 0.0
.text 1522160 1522160 0 0.0
all-clusters-minimal-app default (read/write) 2508952 2508952 0 0.0
.bss 148400 148400 0 0.0
.data 2776 2776 0 0.0
.text 1467216 1467216 0 0.0
light-app default (read/write) 2439240 2439240 0 0.0
.bss 140456 140456 0 0.0
.data 2592 2592 0 0.0
.text 1397504 1397504 0 0.0
lock-app default (read/write) 2466496 2466496 0 0.0
.bss 140304 140304 0 0.0
.data 2600 2600 0 0.0
.text 1424760 1424760 0 0.0
telink light-switch-app tlsr9518adk80d (read/write) 796628 796636 8 0.0
bss 70576 70576 0 0.0
noinit 40416 40416 0 0.0
text 565128 565132 4 0.0
lighting-app tlsr9518adk80d (read/write) 816464 816464 0 0.0
bss 71420 71420 0 0.0
noinit 40416 40416 0 0.0
text 581454 581454 0 0.0

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@woody-apple @mrjerryjohns