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Add parsing for export foo as bar #60015

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Add parsing for export foo as bar #60015

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82de78c
[julia-parser] Unify some import/export code paths
Keno Nov 1, 2025
3d2db6f
Add parsing for `export foo as bar`
Keno Nov 1, 2025
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27 changes: 18 additions & 9 deletions src/julia-parser.scm
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Original file line number Diff line number Diff line change
Expand Up @@ -123,6 +123,13 @@
(and (pair? ex)
(eq? '$ (car ex)))))

(define (symbol-as-or-interpolate? ex)
(or (symbol-or-interpolate? ex)
(and (pair? ex)
(eq? 'as (car ex))
(symbol-or-interpolate? (cadr ex))
(symbol-or-interpolate? (caddr ex)))))

(define (is-word-operator? op)
(every identifier-start-char? (string->list (symbol->string op))))

Expand Down Expand Up @@ -1378,6 +1385,14 @@
(take-lineendings s))
s)))

(define (parse-export s)
(let ((ex (parse-atsym s)))
(if (eq? (peek-token s) 'as)
(begin
(take-token s)
`(as ,ex ,(parse-atsym s)))
ex)))

;; parse expressions or blocks introduced by syntactic reserved words
(define (parse-resword s word)
(with-bindings
Expand Down Expand Up @@ -1615,9 +1630,8 @@
(list 'module (if (eq? word 'module) '(true) '(false)) name
`(block ,loc ,@(cdr body)))))
((export public)
(let ((es (map macrocall-to-atsym
(parse-comma-separated s parse-unary-prefix))))
(if (not (every symbol-or-interpolate? es))
(let ((es (parse-comma-separated s (if (eq? word 'export) parse-export parse-atsym))))
(if (not (every symbol-as-or-interpolate? es))
(error (string "invalid \"" word "\" statement")))
`(,word ,@es)))
((import using)
Expand All @@ -1637,11 +1651,6 @@
,(begin0 (parse-block s)
(expect-end s 'do)))))))

(define (macrocall-to-atsym e)
(if (and (pair? e) (eq? (car e) 'macrocall))
(cadr e)
e))

(define (parse-imports s word)
(let* ((first (parse-import s word #f))
(next (peek-token s))
Expand Down Expand Up @@ -1678,7 +1687,7 @@
(parse-atom s #f))))

(define (parse-atsym s)
(let ((t (peek-token s)))
(let ((t (require-token s)))
(if (eqv? t #\@)
(begin (take-token s)
(macroify-name (parse-macro-name s)))
Expand Down