# std::basic_stacktrace<Allocator>::current

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< cpp‎ | utility‎ | basic stacktrace

static basic_stacktrace current( const allocator_type& alloc = allocator_type() ) noexcept; | (1) | (since C++23)
static basic_stacktrace current( size_type skip, const allocator_type& alloc = allocator_type() ) noexcept; | (2) | (since C++23)
static basic_stacktrace current( size_type skip, size_type max_depth, const allocator_type& alloc = allocator_type() ) noexcept; | (3) | (since C++23)

Let s[i] (0 ≤ `i` < `n`) denote the (`i+1`)-th stacktrace entry in the stacktrace of the current evaluation in the current thread of execution, where `n` is the count of the stacktrace entries in the stackentry.

1) Attempts to create a `basic_stacktrace` consisting of s[0], s[1], ..., s[n - 1].
2) Attempts to create a `basic_stacktrace` consisting of s[m], s[m + 1], ..., s[n - 1], where `m` is `min(skip, n)`.
3) Attempts to create a `basic_stacktrace` consisting of s[m], s[m + 1], ..., s[o - 1], where `m` is `min(skip, n)` and `o` is `min(skip + max_depth, n)`. The behavior is undefined if the skip + max_depth < skip (i.e. the mathematical result of skip + max_depth overflows).

In all cases, `alloc` is stored into the created `basic_stacktrace` and used to allocate the storage for stacktrace entries.

### Parameters

alloc | - | allocator to use for all memory allocations of the constructed `basic_stacktrace`
skip | - | the number of stacktrace entries to skip
max_depth | - | the maximum depth of the stacktrace entries

### Return value

If the allocation succeeds, the `basic_stacktrace` described above.

Otherwise, an empty `basic_stacktrace`.

### Example

| This section is incomplete Reason: no example

### See also

(constructor) | creates a new `basic_stacktrace` (public member function)
current [static] | constructs a new `source_location` corresponding to the location of the call site (public static member function of `std::source_location`)

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