19 Diagnostics library [diagnostics]

19.6 Stacktrace [stacktrace]

19.6.3 Class stacktrace_entry [stacktrace.entry]

19.6.3.4 Query [stacktrace.entry.query]

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[Note 1: 
All the stacktrace_entry query functions treat errors other than memory allocation errors as “no information available” and do not throw in that case.
— end note]
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string description() const;
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Returns: A description of the evaluation represented by *this, or an empty string.
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Throws: bad_alloc if memory for the internal data structures or the resulting string cannot be allocated.
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string source_file() const;
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Returns: The presumed or actual name of the source file ([cpp.predefined]) that lexically contains the expression or statement whose evaluation is represented by *this, or an empty string.
5
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Throws: bad_alloc if memory for the internal data structures or the resulting string cannot be allocated.
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uint_least32_t source_line() const;
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Returns: 0, or a 1-based line number that lexically relates to the evaluation represented by *this.
If source_file returns the presumed name of the source file, returns the presumed line number; if source_file returns the actual name of the source file, returns the actual line number.
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Throws: bad_alloc if memory for the internal data structures cannot be allocated.