tmp/tmprsf8emi6/{from.md → to.md}
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#### Query <a id="stacktrace.entry.query">[[stacktrace.entry.query]]</a>
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[*Note 1*: All the `stacktrace_entry` query functions treat errors
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other than memory allocation errors as “no information available” and do
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not throw in that case. — *end note*]
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``` cpp
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string description() const;
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```
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*Returns:* A description of the evaluation represented by `*this`, or an
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empty string.
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*Throws:* `bad_alloc` if memory for the internal data structures or the
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resulting string cannot be allocated.
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``` cpp
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string source_file() const;
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```
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*Returns:* The presumed or actual name of the source
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file [[cpp.predefined]] that lexically contains the expression or
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statement whose evaluation is represented by `*this`, or an empty
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string.
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*Throws:* `bad_alloc` if memory for the internal data structures or the
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resulting string cannot be allocated.
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``` cpp
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uint_least32_t source_line() const;
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```
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*Returns:* `0`, or a 1-based line number that lexically relates to the
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evaluation represented by `*this`. If `source_file` returns the presumed
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name of the source file, returns the presumed line number; if
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`source_file` returns the actual name of the source file, returns the
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actual line number.
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*Throws:* `bad_alloc` if memory for the internal data structures cannot
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be allocated.
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