Na}{

File Content: `assert.scm`

;
; syntax: assert ?expr ?expr ... [report: ?r-exp ?r-exp ...]
;
; If (and ?expr ?expr ...) evaluates to anything but #f, the result
; is the value of that expression.
; If (and ?expr ?expr ...) evaluates to #f, an error is reported.
; The error message will show the failed expressions, as well
; as the values of selected variables (or expressions, in general).
; The user may explicitly specify the expressions whose
; values are to be printed upon assertion failure -- as ?r-exp that
; follow the identifier 'report:'
; Typically, ?r-exp is either a variable or a string constant.
; If the user specified no ?r-exp, the values of variables that are
; referenced in ?expr will be printed upon the assertion failure.

(define-syntax assert
  (syntax-rules (report:)
    ((assert "doit" (expr ...) (r-exp ...))
     (cond
      ((and expr ...) => (lambda (x) x))
      (else
       (error "assertion failure: ~a" (list '(and expr ...) r-exp ...)))))
    ((assert "collect" (expr ...))
     (assert "doit" (expr ...) ()))
    ((assert "collect" (expr ...) report: r-exp ...)
     (assert "doit" (expr ...) (r-exp ...)))
    ((assert "collect" (expr ...) expr1 stuff ...)
     (assert "collect" (expr ... expr1) stuff ...))
    ((assert stuff ...)
     (assert "collect" () stuff ...))))

(define-syntax assure
  (syntax-rules ()
    ((assure exp error-msg)
     (assert exp report: error-msg))))

Name	Size	Permission
SSAX.scm	126299 bytes	0644
SXML-tree-trans.scm	10081 bytes	0644
SXPath-old.scm	41768 bytes	0644
assert.scm	1395 bytes	0644
input-parse.scm	13649 bytes	0644

File Content: assert.scm

File Content: `assert.scm`