Sigh. Let me redo mdn-expr
any-space -> SPACE | TAB | VTAB | FORMFEED | CR | LF | comment
; the core implementations here need to be
; factored out, as the sweet-expr parser needs
; to do similar processing when differentating
; between space-significant and space-insignificant
; quote.
mdn-expr -> QUOTE any-space* mdn-expr
(list 'quote $3)
mdn-expr -> QUASIQUOTE any-space* mdn-expr
(list 'quasiquote $3)
mdn-expr -> UNQUOTE any-space* mdn-expr
(list 'unquote $3)
mdn-expr -> UNQUOTE-SPLICING any-space* mdn-expr
(list 'unquote-splicing $3)
mdn-expr -> mdn-expr-post-quote
$1
; use a different base-expr here:
; disallow post-mdn-expr after things
; like STRING, NUMBER, OTHER
mdn-expr-post-quote -> base-expr-postable post-mdn-expr
($2 $1)
mdn-expr-post-quote -> base-expr
$1
post-mdn-expr -> post-mdn-expr-1 post-mdn-expr
(lambda (e) ($2 ($1 e)))
post-mdn-expr -> post-mdn-expr-1
$1
post-mdn-expr-1 -> list-notation
(lambda (e) (cons e $1))
post-mdn-expr-1 -> LBRACKET list-content RBRACKET
(lambda (e) (cons 'bracketaccess (cons e $2)))
post-mdn-expr-1 -> curly-infix
(lambda (e) (list e $1))
list-notation -> LPARENS list-content RPARENS
$2
; CONS = . i.e. the dotted-pair operator
list-content -> any-space* CONS any-space* mdn-expr any-space*
$4
list-content -> any-space* mdn-expr list-content
(cons $2 $3)
list-content -> any-space*
'()
base-expr-postable -> SYMBOL
$1
base-expr-postable -> list-notation
$1
base-expr-postable -> bracket-notation
$1
base-expr-postable -> curly-infix
$1
; basically, these cases involve calling
; the built-in reader.
base-expr -> STRING
$1
base-expr -> NUMBER
$1
base-expr -> OTHER ; i.e. for #x reader
$1
base-expr -> base-expr-postable
$1
; again, hook for language-specific bracket meanings
bracket-notation -> bracket-notation-scheme
$1
bracket-notation-scheme -> LBRACKET list-content RBRACKET
$2
bracket-notation-arc -> LBRACKET list-content RBRACKET
(list 'lambda (list '_) $2)
anyone find more bugs?
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