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gexp: Ignore nested gexps in macro expansion.

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Before that, the 'references' and 'natives' or the outer gexp in an
expression like #~#+#~#$coreutils would include those of the inner
gexp.

* guix/gexp.scm (gexp)[collect-escapes]: Ignore everything below
  'ungexp-native' or 'ungexp-native-splicing'.
  [collect-native-escapes]: Ignore everything below 'ungexp' or
  'ungexp-splicing'.
This commit is contained in:
Ludovic Courtès 2015-03-22 23:09:43 +01:00
parent accb682c50
commit 607e1b51f4
1 changed files with 16 additions and 2 deletions
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18
guix/gexp.scm
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@ -474,13 +474,20 @@ (define (collect-escapes exp)
;; Return all the 'ungexp' present in EXP.
(let loop ((exp exp)
(result '()))
(syntax-case exp (ungexp ungexp-splicing)
(syntax-case exp (ungexp
ungexp-splicing
ungexp-native
ungexp-native-splicing)
((ungexp _)
(cons exp result))
((ungexp _ _)
(cons exp result))
((ungexp-splicing _ ...)
(cons exp result))
((ungexp-native _ ...)
result)
((ungexp-native-splicing _ ...)
result)
((exp0 exp ...)
(let ((result (loop #'exp0 result)))
(fold loop result #'(exp ...))))
@ -491,13 +498,20 @@ (define (collect-native-escapes exp)
;; Return all the 'ungexp-native' forms present in EXP.
(let loop ((exp exp)
(result '()))
(syntax-case exp (ungexp-native ungexp-native-splicing)
(syntax-case exp (ungexp
ungexp-splicing
ungexp-native
ungexp-native-splicing)
((ungexp-native _)
(cons exp result))
((ungexp-native _ _)
(cons exp result))
((ungexp-native-splicing _ ...)
(cons exp result))
((ungexp _ ...)
result)
((ungexp-splicing _ ...)
result)
((exp0 exp ...)
(let ((result (loop #'exp0 result)))
(fold loop result #'(exp ...))))