From type/CallFrame

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method file()

This is a shortcut for looking up the file annotation. Therefore, the following code prints True.

my $frame = callframe(0);
say $frame.file eq $frame.annotations<file>;

From type/Code

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method file(Code:D: --> Str:D)

Returns the name of the file in which the code object was declared.

say &infix:<+>.file;   # OUTPUT: «SETTING::src/core.c/Numeric.pm6␤»

From type/Label

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Returns the file the label is defined in.

From type/Backtrace/Frame

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method file(Backtrace::Frame:D --> Str)

Returns the file name.

my $bt = Backtrace.new;
my $btf = $bt[0];
say $btf.file;