diff options
Diffstat (limited to 'gcc/cp/lambda.c')
| -rw-r--r-- | gcc/cp/lambda.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/gcc/cp/lambda.c b/gcc/cp/lambda.c index 54fc3ee..25a4d6f 100644 --- a/gcc/cp/lambda.c +++ b/gcc/cp/lambda.c @@ -695,14 +695,10 @@ tree add_default_capture (tree lambda_stack, tree id, tree initializer) { bool this_capture_p = (id == this_identifier); - tree var = NULL_TREE; - tree saved_class_type = current_class_type; - tree node; - - for (node = lambda_stack; + for (tree node = lambda_stack; node; node = TREE_CHAIN (node)) { @@ -720,6 +716,19 @@ add_default_capture (tree lambda_stack, tree id, tree initializer) == CPLD_REFERENCE)), /*explicit_init_p=*/false); initializer = convert_from_reference (var); + + /* Warn about deprecated implicit capture of this via [=]. */ + if (cxx_dialect >= cxx2a + && this_capture_p + && LAMBDA_EXPR_DEFAULT_CAPTURE_MODE (lambda) == CPLD_COPY + && !in_system_header_at (LAMBDA_EXPR_LOCATION (lambda))) + { + if (warning_at (LAMBDA_EXPR_LOCATION (lambda), OPT_Wdeprecated, + "implicit capture of %qE via %<[=]%> is deprecated " + "in C++20", this_identifier)) + inform (LAMBDA_EXPR_LOCATION (lambda), "add explicit %<this%> or " + "%<*this%> capture"); + } } current_class_type = saved_class_type; |