diff options
Diffstat (limited to 'syntax-highlight')
| -rw-r--r-- | syntax-highlight/scheme.scm | 37 |
1 files changed, 33 insertions, 4 deletions
diff --git a/syntax-highlight/scheme.scm b/syntax-highlight/scheme.scm index 81673cb..78f2150 100644 --- a/syntax-highlight/scheme.scm +++ b/syntax-highlight/scheme.scm @@ -35,6 +35,10 @@ (define (lisp-delimiter? char) (char-set-contains? char-set:lisp-delimiters char)) +(define parse-symbol-chars + (parse-char-set + (char-set-complement char-set:lisp-delimiters))) + (define (parse-specials special-words) "Create a parser for SPECIAL-WORDS, a list of important terms for a language." @@ -48,6 +52,15 @@ language." (fold parse-either parse-never (map special special-words))) +(define (parse-specials/regexp special-regexps) + (let ((merged-regexp + (string-join (map (lambda (regexp) + (string-append "(" regexp ")")) + special-regexps) + "|"))) + (tagged-parser 'special + (parse-regexp merged-regexp parse-symbol-chars)))) + (define (parse-openers openers) (define (open opener) (tagged-parser 'open (parse-string opener))) @@ -69,9 +82,7 @@ language." (tagged-parser 'keyword (parse-map string-concatenate (parse-each (parse-string "#:") - (parse-char-set - (char-set-complement - char-set:lisp-delimiters)))))) + parse-symbol-chars)))) (define parse-string-literal (tagged-parser 'string (parse-delimited "\""))) @@ -82,12 +93,30 @@ language." (define parse-quoted-symbol (tagged-parser 'symbol (parse-delimited "#{" #:until "}#"))) +(define %default-special-symbols + '("define" "begin" "call-with-current-continuation" "call/cc" + "call-with-input-file" "call-with-output-file" + "case" "cond" + "do" "else" "if" + "lambda" "λ" + "let" "let*" "let-syntax" "letrec" "letrec-syntax" + "export" "import" "library" "define-module" "use-module" + "let-values" "let*-values" + "and" "or" + "delay" "force" + "map" "for-each" + "syntax" "syntax-rules")) + +(define %default-special-regexps + '("^define")) + (define scheme-highlighter (parse-many (parse-any parse-whitespace (parse-openers '("(" "[" "{")) (parse-closers '(")" "]" "}")) - (parse-specials '("define" "lambda")) + (parse-specials %default-special-symbols) + (parse-specials/regexp %default-special-regexps) parse-string-literal parse-comment parse-keyword |