|
|
|
|
|
|
|
|
|
|
|
(use-modules (system base lalr) |
|
(ice-9 pretty-print)) |
|
|
|
(define *error* '()) |
|
|
|
(define-syntax check |
|
(syntax-rules (=>) |
|
((_ ?expr => ?expected-result) |
|
(check ?expr (=> equal?) ?expected-result)) |
|
|
|
((_ ?expr (=> ?equal) ?expected-result) |
|
(let ((result ?expr) |
|
(expected ?expected-result)) |
|
(set! *error* '()) |
|
(when (not (?equal result expected)) |
|
(display "Failed test: \n") |
|
(pretty-print (quote ?expr))(newline) |
|
(display "\tresult was: ") |
|
(pretty-print result)(newline) |
|
(display "\texpected: ") |
|
(pretty-print expected)(newline) |
|
(exit 1)))))) |
|
|
|
|
|
|
|
(define (display-result v) |
|
(if v |
|
(begin |
|
(display "==> ") |
|
(display v) |
|
(newline)))) |
|
|
|
(define eoi-token |
|
(make-lexical-token '*eoi* #f #f)) |
|
|
|
(define (make-lexer tokens) |
|
(lambda () |
|
(if (null? tokens) |
|
eoi-token |
|
(let ((t (car tokens))) |
|
(set! tokens (cdr tokens)) |
|
t)))) |
|
|
|
(define (error-handler message . args) |
|
(set! *error* (cons `(error-handler ,message . ,(if (pair? args) |
|
(lexical-token-category (car args)) |
|
'())) |
|
*error*)) |
|
(cons message args)) |
|
|
|
|
|
|
