p.s. for reference here,
Without syntax loc, no location of error in macro:
#|
(define-syntax (messup5 stx)
(datum->syntax stx
(let (
[a 7]
[b 9]
)
(^ a b)
)))
(messup5)
rac...@test-macro-dev-error.rkt> (enter! "test-macro-dev-error.rkt")
[re-loading /home/deep/liquid-extensions/liquid/test-macro-dev-error.rkt]
^: undefined;
cannot reference an identifier before its definition
in module: 'test-macro-dev-error
phase: 1
errortrace...:
context...:
/usr/share/racket/collects/racket/enter.rkt:54:0: dynamic-enter!6
/usr/share/racket/collects/racket/private/misc.rkt:87:7
rac...@test-macro-dev-error.rkt>
|#
With syntax/loc, the error is pointed out in the macro.
#|
(define-syntax (messup4 stx)
(syntax/loc stx
(let (
[a 7]
[b 9]
)
(^ a b)
)))
(messup4)
rac...@test-macro-dev-error.rkt> (enter! "test-macro-dev-error.rkt")
[re-loading /home/deep/liquid-extensions/liquid/test-macro-dev-error.rkt]
test-macro-dev-error.rkt:92:9: ^: unbound identifier in module
in: ^
errortrace...:
context...:
/usr/share/racket/pkgs/errortrace-lib/errortrace/errortrace-lib.rkt:434:2:
errortrace-annotate
/usr/share/racket/pkgs/errortrace-lib/errortrace/errortrace-lib.rkt:482:4
/usr/share/racket/collects/racket/rerequire.rkt:18:0: rerequire
/usr/share/racket/collects/racket/enter.rkt:54:0: dynamic-enter!6
/usr/share/racket/collects/racket/private/misc.rkt:87:7
rac...@test-macro-dev-error.rkt>
|#
In both cases the caller is not in the back trace.
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