80 lines · cpp
1// RUN: %check_clang_tidy -std=c++11-or-later %s cppcoreguidelines-misleading-capture-default-by-value %t2 3struct Obj {4 void lambdas_that_warn_default_capture_copy() {5 int local{};6 int local2{};7 8 auto explicit_this_capture = [=, this]() { };9 // CHECK-MESSAGES: :[[@LINE-1]]:35: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]10 // CHECK-FIXES: auto explicit_this_capture = [this]() { };11 12 auto explicit_this_capture_locals1 = [=, this]() { return (local+x) > 10; };13 // CHECK-MESSAGES: :[[@LINE-1]]:43: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]14 // CHECK-FIXES: auto explicit_this_capture_locals1 = [local, this]() { return (local+x) > 10; };15 16 auto explicit_this_capture_locals2 = [=, this]() { return (local+local2) > 10; };17 // CHECK-MESSAGES: :[[@LINE-1]]:43: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]18 // CHECK-FIXES: auto explicit_this_capture_locals2 = [local, local2, this]() { return (local+local2) > 10; };19 20 auto explicit_this_capture_local_ref = [=, this, &local]() { return (local+x) > 10; };21 // CHECK-MESSAGES: :[[@LINE-1]]:45: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]22 // CHECK-FIXES: auto explicit_this_capture_local_ref = [this, &local]() { return (local+x) > 10; };23 24 auto explicit_this_capture_local_ref2 = [=, &local, this]() { return (local+x) > 10; };25 // CHECK-MESSAGES: :[[@LINE-1]]:46: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]26 // CHECK-FIXES: auto explicit_this_capture_local_ref2 = [&local, this]() { return (local+x) > 10; };27 28 auto explicit_this_capture_local_ref3 = [=, &local, this, &local2]() { return (local+x) > 10; };29 // CHECK-MESSAGES: :[[@LINE-1]]:46: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]30 // CHECK-FIXES: auto explicit_this_capture_local_ref3 = [&local, this, &local2]() { return (local+x) > 10; };31 32 auto explicit_this_capture_local_ref4 = [=, &local, &local2, this]() { return (local+x) > 10; };33 // CHECK-MESSAGES: :[[@LINE-1]]:46: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]34 // CHECK-FIXES: auto explicit_this_capture_local_ref4 = [&local, &local2, this]() { return (local+x) > 10; };35 36 auto explicit_this_capture_local_ref_extra_whitespace = [=, & local, &local2, this]() { return (local+x) > 10; };37 // CHECK-MESSAGES: :[[@LINE-1]]:62: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]38 // CHECK-FIXES: auto explicit_this_capture_local_ref_extra_whitespace = [& local, &local2, this]() { return (local+x) > 10; };39 40 auto explicit_this_capture_local_ref_with_comment = [=, & /* byref */ local, &local2, this]() { return (local+x) > 10; };41 // CHECK-MESSAGES: :[[@LINE-1]]:58: warning: lambdas that capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]42 // CHECK-FIXES: auto explicit_this_capture_local_ref_with_comment = [& /* byref */ local, &local2, this]() { return (local+x) > 10; };43 44 auto implicit_this_capture = [=]() { return x > 10; };45 // CHECK-MESSAGES: :[[@LINE-1]]:35: warning: lambdas that implicitly capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]46 // CHECK-FIXES: auto implicit_this_capture = [this]() { return x > 10; };47 48 auto implicit_this_capture_local = [=]() { return (local+x) > 10; };49 // CHECK-MESSAGES: :[[@LINE-1]]:41: warning: lambdas that implicitly capture 'this' should not specify a by-value capture default [cppcoreguidelines-misleading-capture-default-by-value]50 // CHECK-FIXES: auto implicit_this_capture_local = [local, this]() { return (local+x) > 10; };51 }52 53 void lambdas_that_dont_warn_default_capture_ref() {54 int local{};55 int local2{};56 57 auto ref_explicit_this_capture = [&, this]() { };58 auto ref_explicit_this_capture_local = [&, this]() { return (local+x) > 10; };59 60 auto ref_implicit_this_capture = [&]() { return x > 10; };61 auto ref_implicit_this_capture_local = [&]() { return (local+x) > 10; };62 auto ref_implicit_this_capture_locals = [&]() { return (local+local2+x) > 10; };63 }64 65 void lambdas_that_dont_warn() {66 int local{};67 int local2{};68 auto explicit_this_capture = [this]() { };69 auto explicit_this_capture_local = [this, local]() { return local > 10; };70 auto explicit_this_capture_local_ref = [this, &local]() { return local > 10; };71 72 auto no_captures = []() {};73 auto capture_local_only = [local]() {};74 auto ref_capture_local_only = [&local]() {};75 auto capture_many = [local, &local2]() {};76 }77 78 int x;79};80