inspect

Source locations of running code: backtraces of a strand's calls, and where functions are defined.

Locations come from the debug info that compiled code carries, so code without it has none.

Types

Type	Description
Backtrace	A snapshot of a strand's calls, innermost first.
Frame	One call in a Backtrace.
Location	A span of source code in a file.

Functions

definition func -> (Location | nil)

Gives where a Do function is defined.

For a named function or method, the location runs from def through the name. For a do block, it runs from do through the parameters and return type, leaving out the body. A bound method, such as obj.method, gives the location of the Do method it calls.

Gives nil for anything else: a native function or method, an object callable through a (call) method, or a value that isn't callable.

Parameters

Name	Type	Description
func	Value	Value to look up.