Clarification of 2 Trivial Issues?

This may seem silly but I'm trying to make sure I understand what
I'm seeing in gmake's source code.

1) In "filedef.h I see the composition of the "file" struct, with the 
comment

/* Structure that represents the info on one file
    that the makefile says how to make.
    All of these are chained together through 'next'.  */

But there is no field named "next" in a "file" struct.
Instead, there's a field named "deps", which is a pointer to the
"dep" structure. The "dep" structure does contain a "next" field.

So, is it accurate to say "All of these are chained together
through 'next'? This is especially relevant in the situation
where there are no double-colon entries, which would mean that
the "file" struct's "prev" and "next" fields won't be used,
and therefore, there won't be any chaining.

2) In "dep.h" I see the comment

/* Structure representing one dependency of a file.
    Each struct file's 'deps' points to a chain of these,
    through 'next'. [...] */

Let's say I have a makefile with the following target and prerequisites:

	main.o : main.c defs.h

Am I right in assuming that the "file" struct for "main.o" will
have nothing in its "prev" and "next" fields, but its "dep"
field will have a chain of 2 "dep" structures, one for "main.c"
and the other for "defs.h" because "main.c" and "def.h" are
dependencies of "main.o"?

In other words, in a makefile without double-colons, there's no chaining
at all in the "file" structure.

Sorry for such trivial questions but the "All of these are chained
together through 'next'." comment in filedef.h seems misleading.

Cordially,
Jon Forrest