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Overview
Comment: | Use letrec* in make-at-reader+table to ensure correct sequencing of operations |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
01fdd8217d8a84921ea8130ad7e53f9c |
User & Date: | murphy 2015-05-04 08:03:04.991 |
Context
2015-05-04
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09:15 | Moved suspension module into separate compilation unit, isolating disabled interrupts check-in: 72a7ba057e user: murphy tags: trunk | |
08:03 | Use letrec* in make-at-reader+table to ensure correct sequencing of operations check-in: 01fdd8217d user: murphy tags: trunk | |
2013-11-24
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22:17 | Optional direct HTTP support using soup check-in: 11d7807ffd user: murphy tags: trunk | |
Changes
Changes to webgate-utils.scm.
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44 45 46 47 48 49 50 | 'read-netstring "client side protocol error: malformed netstring (bad terminal)")) s))) ;;; @-expressions (define (make-at-reader+table args) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | 'read-netstring "client side protocol error: malformed netstring (bad terminal)")) s))) ;;; @-expressions (define (make-at-reader+table args) (letrec* ((command-char (get-keyword #:command-char args (constantly #\@))) (trim-whitespace? (get-keyword #:trim-whitespace? args (constantly #t))) (condense-whitespace? (get-keyword #:condense-whitespace? args (constantly #t))) (list-arguments? (get-keyword #:list-arguments? args (constantly #f))) (char-normal? (cute char-set-contains? (char-set-complement (char-set command-char #\{ #\} #\return #\newline)) <>)) (char-group? (cute char-set-contains? (char-set #\[ #\{) <>)) (skip-whitespace (lambda (port) (when (char-whitespace? (peek-char port)) (read-char port) (skip-whitespace port)))) (read-whitespace (if condense-whitespace? (lambda (port) (skip-whitespace port) " ") (cut read-token char-whitespace? <>))) (read-datum (lambda (port) (parameterize ((current-read-table datum-read-table)) (read port)))) (read-at-exp (lambda (port) (skip-whitespace port) (let ((char (peek-char port))) (cond ((eof-object? char) (read-char port)) (else (when (eqv? char command-char) (read-char port)) (let* ((head (and (not (char-group? (peek-char port))) (read-datum port))) (args (and (eqv? (peek-char port) #\[) (read-datum port))) (body (and (eqv? (peek-char port) #\{) (read-inside-at-exp 'skip port)))) (if (or args body) (append! (cond (head => list) (else '())) (cond ((and list-arguments? args) => list) (else (or args '()))) (or body '())) head))))))) (read-inside-at-exp (lambda (brace-mode port) (append! (let ((head (case brace-mode ((none) '()) ((skip) (and (eqv? (peek-char port) #\{) (begin (read-char port) '()))) (else (and (eqv? (peek-char port) #\{) (list (string (read-char port)))))))) (if head (begin (when trim-whitespace? (skip-whitespace port)) head) (syntax-error 'read-inside-at-exp "expected @-expression body, found" (peek-char port)))) (let more () (let ((char (peek-char port))) (cond ((eqv? char #\{) (case brace-mode ((none) (cons (string (read-char port)) (more))) (else (append! (read-inside-at-exp 'keep port) (more))))) ((eqv? char #\}) (case brace-mode ((none) (cons (string (read-char port)) (more))) ((skip) (read-char port) '()) (else (list (string (read-char port)))))) ((eof-object? char) (case brace-mode ((none) (read-char port) '()) (else (syntax-error 'read-inside-at-exp "@-expression body not closed")))) ((eqv? char command-char) (cons (read-at-exp port) (more))) ((char-whitespace? char) (let* ((head (read-whitespace port)) (tail (more))) (if (or (pair? tail) (not trim-whitespace?)) (cons head tail) tail))) (else (cons (read-token char-normal? port) (more))))))))) (read-table (get-keyword #:read-table args current-read-table)) (at-read-table (parameterize ((current-read-table (copy-read-table read-table))) (set-read-syntax! command-char read-at-exp) (current-read-table))) (datum-read-table (let ((spec (get-keyword #:datum-read-table args (constantly #t)))) (cond ((procedure? spec) (spec at-read-table)) (spec at-read-table) (else read-table))))) (values (if (get-keyword #:inside? args) (lambda (#!optional (port (current-input-port))) (read-inside-at-exp 'none port)) (lambda (#!optional (port (current-input-port))) (read-at-exp port))) at-read-table))) |
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