diff --git a/beautiful-racket-demo/basic-demo-2/colorer.rkt b/beautiful-racket-demo/basic-demo-2/colorer.rkt new file mode 100644 index 0000000..a317a63 --- /dev/null +++ b/beautiful-racket-demo/basic-demo-2/colorer.rkt @@ -0,0 +1,22 @@ +#lang br +(require "lexer.rkt" brag/support) +(provide color-basic) + +(define (color-basic port) + (define srcloc-tok (basic-lexer port)) + (match srcloc-tok + [(? eof-object?) (values srcloc-tok 'eof #f #f #f)] + [else ; reverse-engineer with `match-define` + (match-define (srcloc-token (token-struct type val _ _ _ _ _) + (srcloc _ _ _ pos span)) srcloc-tok) + (define (color cat [paren #f]) + (values (or val "") cat paren pos (+ pos span))) + (match type + ['STRING (color 'string)] + ['REM (color 'comment)] + [else (match val + [(? number?) (color 'constant)] + [(? symbol?) (color 'symbol)] + ["(" (color 'parenthesis '|(|)] + [")" (color 'parenthesis '|)|)] + [else (color 'no-color)])])])) \ No newline at end of file diff --git a/beautiful-racket-demo/basic-demo-2/lexer.rkt b/beautiful-racket-demo/basic-demo-2/lexer.rkt index 141e8eb..04eb928 100644 --- a/beautiful-racket-demo/basic-demo-2/lexer.rkt +++ b/beautiful-racket-demo/basic-demo-2/lexer.rkt @@ -10,7 +10,7 @@ [whitespace (token lexeme #:skip? #t)] [(from/stop-before "rem" "\n") (token 'REM lexeme)] [(:or "print" "goto" "end" "+" ":" "gosub" "return" "let" "=" "-" "for" "to" "step" "next" - "if" "then" "else" "and" "or" "<" ">" "*" "/" "(" ")" "^" "!" "%" "input" ";" "def") lexeme] + "if" "then" "else" "and" "or" "<" ">" "*" "/" "(" ")" "^" "!" "%" "input" ";" "def") (token lexeme lexeme)] [(:seq (:+ alphabetic) (:* (:or alphabetic numeric "$"))) (token 'ID (string->symbol lexeme))] [digits (token 'INTEGER (string->number lexeme))] [(:or (:seq (:? digits) "." digits) @@ -21,4 +21,4 @@ (substring lexeme 1 (sub1 (string-length lexeme))))])) -(provide basic-lexer) +(provide basic-lexer) \ No newline at end of file diff --git a/beautiful-racket-demo/basic-demo-2/main.rkt b/beautiful-racket-demo/basic-demo-2/main.rkt index 454a573..d48546f 100644 --- a/beautiful-racket-demo/basic-demo-2/main.rkt +++ b/beautiful-racket-demo/basic-demo-2/main.rkt @@ -1,11 +1,19 @@ #lang br/quicklang (require "parser.rkt" "tokenizer.rkt") +(module+ reader + (provide read-syntax get-info)) + (define (read-syntax path port) (define parse-tree (parse path (make-tokenizer port path))) (strip-bindings #`(module basic-mod basic-demo-2/expander #,parse-tree))) -(module+ reader - (provide read-syntax)) +(define (get-info port mod line col pos) + (define (handle-query key default) + (case key + [(color-lexer) + (dynamic-require 'basic-demo-2/colorer 'color-basic)] + [else default])) + handle-query) \ No newline at end of file