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since 4.02.0

type t = backtrace_slot

val is_raise : t -> bool

is_raise slot is true when slot refers to a raising point in the code, and false when it comes from a simple function call.

since 4.02

val is_inline : t -> bool

is_inline slot is true when slot refers to a call that got inlined by the compiler, and false when it comes from any other context.

since 4.04.0

val location : t -> location option

location slot returns the location information of the slot, if available, and None otherwise.

Some possible reasons for failing to return a location are as follow:

the slot corresponds to a compiler-inserted raise
the slot corresponds to a part of the program that has not been compiled with debug information (-g)

since 4.02

val format : int -> t -> string option

format pos slot returns the string representation of slot as raw_backtrace_to_string would format it, assuming it is the pos-th element of the backtrace: the 0-th element is pretty-printed differently than the others.

Whole-backtrace printing functions also skip some uninformative slots; in that case, format pos slot returns None.

since 4.02