;;;; tree-il.test --- test suite for compiling tree-il   -*- scheme -*-
;;;; Andy Wingo <wingo@pobox.com> --- May 2009
;;;;
;;;; Copyright (C) 2009-2014,2018-2021,2023 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (test-suite tree-il)
  #:use-module (test-suite lib)
  #:use-module (system base compile)
  #:use-module (system base pmatch)
  #:use-module (system base message)
  #:use-module (language tree-il)
  #:use-module (language tree-il primitives)
  #:use-module (language tree-il optimize)
  #:use-module (ice-9 match)
  #:use-module (ice-9 regex)
  #:use-module (srfi srfi-13))

(define-syntax-rule (pass-if-primitives-resolved in expected)
  (pass-if (format #f "primitives-resolved in ~s" 'in)
    (let* ((module   (let ((m (make-module)))
                       (beautify-user-module! m)
                       m))
           (orig     (parse-tree-il 'in))
           (resolved (expand-primitives (resolve-primitives orig module))))
      (or (equal? (unparse-tree-il resolved) 'expected)
          (begin
            (format (current-error-port)
                    "primitive test failed: got ~s, expected ~s"
                    resolved 'expected)
            #f)))))

(define-syntax pass-if-tree-il->scheme
  (syntax-rules ()
    ((_ in pat)
     (assert-scheme->tree-il->scheme in pat #t))
    ((_ in pat guard-exp)
     (pass-if 'in
       (pmatch (tree-il->scheme
                (compile 'in #:from 'scheme #:to 'tree-il))
         (pat (guard guard-exp) #t)
         (_ #f))))))


(with-test-prefix "primitives"

  (with-test-prefix "error"
    (pass-if-primitives-resolved
        (primcall error (const "message"))
      (primcall throw (const misc-error) (const #f)
                (const "message") (primcall list) (const #f)))

    (pass-if-primitives-resolved
        (primcall error (const "message") (const 42))
      (primcall throw (const misc-error) (const #f)
                (const "message ~S") (primcall list (const 42))
                (const #f)))

    (pass-if-equal "https://bugs.gnu.org/39509"
        '(throw 'misc-error #f "~A" (list "message") #f)
      (let ((module (make-fresh-user-module)))
        (decompile (expand-primitives
                    (resolve-primitives
                     (compile '(error ((lambda () "message")))
                              #:to 'tree-il)
                     module))
                   #:from 'tree-il
                   #:to 'scheme)))

    (pass-if-equal "https://bugs.gnu.org/39509 with argument"
        '(throw 'misc-error #f "~A ~S" (list "message" 42) #f)
      (let ((module (make-fresh-user-module)))
        (decompile (expand-primitives
                    (resolve-primitives
                     (compile '(error ((lambda () "message")) 42)
                              #:to 'tree-il)
                     module))
                   #:from 'tree-il
                   #:to 'scheme)))))


(define* (compile+optimize exp #:key (env (current-module))
                           (optimization-level 2) (opts '()))
  (let ((optimize (make-lowerer optimization-level opts)))
    (optimize (compile exp #:to 'tree-il #:env env) env)))

(with-test-prefix "optimize"

  (pass-if-equal "https://debbugs.gnu.org/48098"
      '(begin
         (display "hey!\n")
         42)
    (decompile
     (compile+optimize
      '(begin
         (call-with-prompt (make-prompt-tag)
           (lambda () (display "hey!\n"))
           (lambda (k) #f))
         42)))))


(with-test-prefix "tree-il->scheme"
  (pass-if-tree-il->scheme
   (case-lambda ((a) a) ((b c) (list b c)))
   (case-lambda ((,a) ,a1) ((,b ,c) (list ,b1 ,c1)))
   (and (eq? a a1) (eq? b b1) (eq? c c1))))


(with-test-prefix "contification"
  (pass-if "http://debbugs.gnu.org/9769"
    ((compile '(lambda ()
                 (let ((fail (lambda () #f)))
                   (let ((test (lambda () (fail))))
                     (test))
                   #t))
              ;; Prevent inlining.  We're testing contificatoin here,
              ;; and inlining it will reduce the entire thing to #t.
              #:opts '(#:partial-eval? #f)))))


(define (sum . args)
  (apply + args))

(with-test-prefix "many args"
  (pass-if "call with > 256 args"
    (equal? (compile `(1+ (sum ,@(iota 1000)))
                     #:env (current-module))
            (1+ (apply sum (iota 1000)))))

  (pass-if "tail call with > 256 args"
    (equal? (compile `(sum ,@(iota 1000))
                     #:env (current-module))
            (apply sum (iota 1000)))))



(with-test-prefix "tree-il-fold"

  (pass-if "void"
    (let ((up 0) (down 0) (mark (list 'mark)))
      (and (eq? mark
                (tree-il-fold (lambda (x y) (set! down (1+ down)) y)
                              (lambda (x y) (set! up (1+ up)) y)
                              mark
                              (make-void #f)))
           (= up 1)
           (= down 1))))

  (pass-if "lambda and application"
    (let* ((ups '()) (downs '())
           (result (tree-il-fold (lambda (x y)
                                   (set! downs (cons x downs))
                                   (1+ y))
                                 (lambda (x y)
                                   (set! ups (cons x ups))
                                   (1+ y))
                                 0
                                 (parse-tree-il
                                  '(lambda ()
                                     (lambda-case
                                      (((x y) #f #f #f () (x1 y1))
                                       (call (toplevel +)
                                             (lexical x x1)
                                             (lexical y y1)))
                                      #f))))))
      (define (strip-source x)
        (post-order (lambda (x)
                      (set! (tree-il-src x) #f)
                      x)
                    x))
      (and (= result 12)
           (equal? (map strip-source (list-head (reverse ups) 3))
                   (list (make-toplevel-ref #f #f '+)
                         (make-lexical-ref #f 'x 'x1)
                         (make-lexical-ref #f 'y 'y1)))
           (equal? (map strip-source (reverse (list-head downs 3)))
                   (list (make-toplevel-ref #f #f '+)
                         (make-lexical-ref #f 'x 'x1)
                         (make-lexical-ref #f 'y 'y1)))))))


;;;
;;; Warnings.
;;;

;; Make sure we get English messages.
(when (defined? 'setlocale)
  (setlocale LC_ALL "C"))

(define (call-with-warnings thunk)
  (let ((port (open-output-string)))
    ;; Disable any warnings added by default.
    (parameterize ((default-warning-level 0))
      (with-fluids ((*current-warning-port*   port)
                    (*current-warning-prefix* ""))
        (thunk)))
    (let ((warnings (get-output-string port)))
      (string-tokenize warnings
                       (char-set-complement (char-set #\newline))))))

(define %opts-w-unused
  '(#:warnings (unused-variable)))

(define %opts-w-unused-toplevel
  '(#:warnings (unused-toplevel)))

(define %opts-w-unused-module
  '(#:warnings (unused-module)))

(define %opts-w-shadowed-toplevel
  '(#:warnings (shadowed-toplevel)))

(define %opts-w-unbound
  '(#:warnings (unbound-variable)))

(define %opts-w-use-before-definition
  '(#:warnings (use-before-definition)))

(define %opts-w-non-idempotent-definition
  '(#:warnings (non-idempotent-definition)))

(define %opts-w-arity
  '(#:warnings (arity-mismatch)))

(define %opts-w-format
  '(#:warnings (format)))

(define %opts-w-duplicate-case-datum
  '(#:warnings (duplicate-case-datum)))

(define %opts-w-bad-case-datum
  '(#:warnings (bad-case-datum)))


(with-test-prefix "warnings"

   (pass-if "unknown warning type"
     (let ((w (call-with-warnings
                (lambda ()
                  (compile #t #:opts '(#:warnings (does-not-exist)))))))
       (and (= (length w) 1)
            (number? (string-contains (car w) "unknown warning")))))

   (with-test-prefix "unused-variable"

     (pass-if "quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(lambda (x y) (+ x y))
                           #:opts %opts-w-unused)))))

     (pass-if "let/unused"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(lambda (x)
                                (let ((y (+ x 2)))
                                  x))
                             #:opts %opts-w-unused)))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "unused variable `y'")))))

     (pass-if "shadowed variable"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(lambda (x)
                                (let ((y x))
                                  (let ((y (+ x 2)))
                                    (+ x y))))
                             #:opts %opts-w-unused)))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "unused variable `y'")))))

     (pass-if "letrec"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(lambda ()
                              (letrec ((x (lambda () (y)))
                                       (y (lambda () (x))))
                                y))
                           #:opts %opts-w-unused)))))

     (pass-if "unused argument"
       ;; Unused arguments should not be reported.
       (null? (call-with-warnings
                (lambda ()
                  (compile '(lambda (x y z) #t)
                           #:opts %opts-w-unused)))))

     (pass-if "special variable names"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(lambda ()
                              (let ((_ 'underscore)
                                    (#{gensym name}# 'ignore-me))
                                #t))
                           #:to 'cps
                           #:opts %opts-w-unused))))))

   (with-test-prefix "unused-toplevel"

     (pass-if "used after definition"
       (null? (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define foo 2) foo")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts %opts-w-unused-toplevel))))))

     (pass-if "used before definition"
       (null? (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define (bar) foo) (define foo 2) (bar)")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts %opts-w-unused-toplevel))))))

     (pass-if "unused but public"
       (let ((in (open-input-string
                  "(define-module (test-suite tree-il x) #:export (bar))
                   (define (bar) #t)")))
         (null? (call-with-warnings
                  (lambda ()
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts %opts-w-unused-toplevel))))))

     (pass-if "unused but public (more)"
       (let ((in (open-input-string
                  "(define-module (test-suite tree-il x) #:export (bar))
                   (define (bar) (baz))
                   (define (baz) (foo))
                   (define (foo) #t)")))
         (null? (call-with-warnings
                  (lambda ()
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts %opts-w-unused-toplevel))))))

     (pass-if "unused but define-public"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(define-public foo 2)
                           #:to 'cps
                           #:opts %opts-w-unused-toplevel)))))

     (pass-if "used by macro"
       ;; FIXME: See comment about macros at `unused-toplevel-analysis'.
       (throw 'unresolved)

       (null? (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define (bar) 'foo)
                              (define-syntax baz
                                (syntax-rules () ((_) (bar))))")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts %opts-w-unused-toplevel))))))

     (pass-if "unused"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(define foo 2)
                             #:to 'cps
                             #:opts %opts-w-unused-toplevel)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        (format #f "top-level variable `~A'"
                                                'foo))))))

     (pass-if "unused recursive"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(define (foo) (foo))
                             #:to 'cps
                             #:opts %opts-w-unused-toplevel)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        (format #f "top-level variable `~A'"
                                                'foo))))))

     (pass-if "unused mutually recursive"
       (let* ((in (open-input-string
                   "(define (foo) (bar)) (define (bar) (foo))"))
              (w  (call-with-warnings
                    (lambda ()
                      (read-and-compile in
                                        #:to 'cps
                                        #:opts %opts-w-unused-toplevel)))))
         (and (= (length w) 2)
              (number? (string-contains (car w)
                                        (format #f "top-level variable `~A'"
                                                'foo)))
              (number? (string-contains (cadr w)
                                        (format #f "top-level variable `~A'"
                                                'bar))))))

     (pass-if "special variable names"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(define #{gensym name}# 'ignore-me)
                           #:to 'cps
                           #:opts %opts-w-unused-toplevel))))))

   (with-test-prefix "unused-module"

     (pass-if-equal "quiet"
         '()
       (call-with-warnings
        (lambda ()
          (compile '(begin
                      (use-modules (ice-9 popen))
                      (define (proc cmd)
                        (open-input-pipe cmd)))
                   #:env (make-fresh-user-module)
                   #:opts %opts-w-unused-module))))

     (pass-if-equal "quiet, renamer"
         '()
       (call-with-warnings
        (lambda ()
          (compile '(begin
                      (use-modules ((ice-9 popen) #:prefix p-))
                      (define (proc cmd)
                        (p-open-input-pipe cmd)))
                   #:env (make-fresh-user-module)
                   #:opts %opts-w-unused-module))))

     (pass-if "definitely unused"
       (let* ((defmod '(define-module (foo)
                         #:use-module (ice-9 vlist)
                         #:use-module (ice-9 popen)
                         #:export (proc)))
              (w (call-with-warnings
                  (lambda ()
                    (set-source-properties! defmod
                                            '((filename . "foo.scm")
                                              (line . 0)
                                              (column . 0)))
                    (compile `(begin
                                ,defmod
                                (define (frob x)
                                  (vlist-cons x vlist-null)))
                             #:env (make-fresh-user-module)
                             #:opts %opts-w-unused-module)))))
         (and (= (length w) 1)
              (string-prefix? "foo.scm:1:0" (car w))
              (number? (string-contains (car w)
                                        "unused module (ice-9 popen)")))))

     (pass-if "definitely unused, use-modules"
       (let* ((usemod '(use-modules (rnrs bytevectors)
                                    (ice-9 q)))
              (w (call-with-warnings
                  (lambda ()
                    (set-source-properties! usemod
                                            '((filename . "bar.scm")
                                              (line . 5)
                                              (column . 0)))
                    (compile `(begin
                                ,usemod
                                (define (square x)
                                  (* x x)))
                             #:env (make-fresh-user-module)
                             #:opts %opts-w-unused-module)))))
         (and (= (length w) 2)
              (string-prefix? "bar.scm:6:0" (car w))
              (number? (string-contains (car w)
                                        "unused module (rnrs bytevectors)"))
              (number? (string-contains (cadr w)
                                        "unused module (ice-9 q)")))))

     (pass-if "definitely unused, local binding shadows imported one"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile `(begin
                               (define-module (whatever x y z)
                                 #:use-module (ice-9 popen)
                                 #:export (frob))

                               (define (open-input-pipe x)
                                 ;; Shadows the one from (ice-9 popen).
                                 x)
                               (define (frob y)
                                 (close-port (open-input-pipe y))))
                            #:env (make-fresh-user-module)
                            #:opts %opts-w-unused-module)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "unused module (ice-9 popen)")))))

     (pass-if-equal "(ice-9 match) is actually used"
         '()
       ;; (ice-9 match) is used and the macro expansion of the 'match'
       ;; form refers to (@@ (ice-9 match) car) and the likes.
       (call-with-warnings
        (lambda ()
          (compile '(begin
                      (use-modules (ice-9 match))
                      (define (proc lst)
                        (match lst
                          ((a b c) (+ a (* b c))))))
                   #:env (make-fresh-user-module)
                   #:opts %opts-w-unused-module))))

     (pass-if-equal "re-exporting is using"
         '()
       ;; This module re-exports a binding from (ice-9 q), so (ice-9 q)
       ;; should be considered as used.
       (call-with-warnings
        (lambda ()
          (compile '(begin
                      (define-module (this is an ice-9 q user)
                        #:use-module (ice-9 q)
                        #:re-export (make-q)
                        #:export (proc))
                      (define (proc a b)
                        (* a b)))
                   #:env (make-fresh-user-module)
                   #:opts %opts-w-unused-module))))

     (pass-if "(srfi srfi-26) might be unused"
       ;; At the tree-il level, it is impossible to know whether (srfi
       ;; srfi-26) is actually use, because all we see is the output of
       ;; macro expansion, and in this case it doesn't capture any
       ;; binding from (srfi srfi-26).
       (let* ((w (call-with-warnings
                  (lambda ()
                    (compile `(begin
                                (define-module (whatever)
                                  #:use-module (srfi srfi-26)
                                  #:export (square))
                                (define double
                                  (cut * 2 <>)))
                             #:env (make-fresh-user-module)
                             #:opts %opts-w-unused-module)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "possibly unused module (srfi srfi-26)")))))

     (pass-if-equal "(ice-9 format) is actually used"
         '()
       ;; The 'format' binding of (ice-9 format) takes precedence over
       ;; (@@ (guile) format), so (ice-9 format) must not be reported as
       ;; unused.
       (call-with-warnings
        (lambda ()
          (compile '(begin
                      (define-module (whatever-else)
                        #:use-module (ice-9 format)
                        #:export (proc))
                      (define (proc lst)
                        (format #f "~{~a ~}~%" lst)))
                   #:env (make-fresh-user-module)
                   #:opts %opts-w-unused-module)))))

   (with-test-prefix "shadowed-toplevel"

     (pass-if "quiet"
       (null? (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define foo 2) (define bar 3)")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts
                                      %opts-w-shadowed-toplevel))))))

     (pass-if "internal define"
       (null? (call-with-warnings
               (lambda ()
                 (let ((in (open-input-string
                            "(define foo 2)
  (define (bar x) (define foo (+ x 2)) (* foo x))")))
                   (read-and-compile in
                                     #:to 'cps
                                     #:opts
                                     %opts-w-shadowed-toplevel))))))

     (pass-if "one shadowing definition"
       (match (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define foo 2)\n  (define foo 3)")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts
                                      %opts-w-shadowed-toplevel))))
         ((message)
          (->bool (string-match ":2:2:.*previous.*foo.*:1:0" message)))))

     (pass-if "two shadowing definitions"
       (match (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define-public foo 2)\n(define foo 3)
  (define (foo x) x)")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts
                                      %opts-w-shadowed-toplevel))))
         ((message1 message2)
          (->bool
           (and (string-match ":2:0:.*previous.*foo.*:1:0" message1)
                (string-match ":3:2:.*previous.*foo.*:1:0" message2))))))

     (pass-if "define-public"
       (match (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string
                             "(define foo 2)\n(define-public foo 3)")))
                    (read-and-compile in
                                      #:to 'cps
                                      #:opts
                                      %opts-w-shadowed-toplevel))))
         ((message)
          (->bool (string-match ":2:0:.*previous.*foo.*:1:0" message)))))

     (pass-if "macro"
       (match (call-with-warnings
               (lambda ()
                 (let ((in (open-input-string
                            "(define foo 42)
  (define-syntax-rule (defun proc (args ...) body ...)
    (define (proc args ...) body ...))
  (defun foo (a b c) (+ a b c))")))
                   (read-and-compile in
                                     #:to 'cps
                                     #:opts
                                     %opts-w-shadowed-toplevel))))
         ((message)
          (->bool (string-match ":4:2:.*previous.*foo.*:1:0" message))))))

   (with-test-prefix "unbound variable"

     (pass-if "quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '+ #:opts %opts-w-unbound)))))

     (pass-if "ref"
       (let* ((v (gensym))
              (w (call-with-warnings
                   (lambda ()
                     (compile v
                              #:to 'cps
                              #:opts %opts-w-unbound)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        (format #f "unbound variable `~A'"
                                                v))))))

     (pass-if "set!"
       (let* ((v (gensym))
              (w (call-with-warnings
                   (lambda ()
                     (compile `(set! ,v 7)
                              #:to 'cps
                              #:opts %opts-w-unbound)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        (format #f "unbound variable `~A'"
                                                v))))))

     (pass-if "module-local top-level is visible"
       (let ((m (make-module))
             (v (gensym)))
         (beautify-user-module! m)
         (compile `(define ,v 123)
                  #:env m #:opts %opts-w-unbound)
         (null? (call-with-warnings
                  (lambda ()
                    (compile v
                             #:env m
                             #:to 'cps
                             #:opts %opts-w-unbound))))))

     (pass-if "module-local top-level is visible after"
       (let ((m (make-module))
             (v (gensym)))
         (beautify-user-module! m)
         (null? (call-with-warnings
                  (lambda ()
                    (let ((in (open-input-string
                               "(define (f)
                                  (set! chbouib 3))
                                (define chbouib 5)")))
                      (read-and-compile in
                                        #:env m
                                        #:opts %opts-w-unbound)))))))

     (pass-if "optional arguments are visible"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(lambda* (x #:optional y z) (list x y z))
                           #:opts %opts-w-unbound
                           #:to 'cps)))))

     (pass-if "keyword arguments are visible"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(lambda* (x #:key y z) (list x y z))
                           #:opts %opts-w-unbound
                           #:to 'cps)))))

     (pass-if "GOOPS definitions are visible"
       (let ((m (make-module))
             (v (gensym)))
         (beautify-user-module! m)
         (module-use! m (resolve-interface '(oop goops)))
         (null? (call-with-warnings
                  (lambda ()
                    (let ((in (open-input-string
                               "(define-class <foo> ()
                                  (bar #:getter foo-bar))
                                (define z (foo-bar (make <foo>)))")))
                      (read-and-compile in
                                        #:env m
                                        #:opts %opts-w-unbound))))))))

   (pass-if "re-exported binding"          ;<https://bugs.gnu.org/47031>
     (null? (call-with-warnings
             (lambda ()
               (compile '(begin
                           (use-modules (srfi srfi-35))

                           ;; This 'condition' form expands to a
                           ;; 'make-compound-condition' call, which is
                           ;; re-exported from (ice-9 exceptions).
                           (condition (&error)
                                      (&message (message "oh!"))))
                        #:opts %opts-w-unbound)))))

   (with-test-prefix "use-before-definition"
     (define-syntax-rule (pass-if-warnings expr pat test)
       (pass-if 'expr
         (match (call-with-warnings
                 (lambda ()
                   (compile 'expr #:to 'cps
                            #:opts %opts-w-use-before-definition)))
           (pat test)
           (_ #f))))

     (define-syntax-rule (pass-if-no-warnings expr)
       (pass-if-warnings expr () #t))

     (pass-if-no-warnings
      (begin (define x +) x))
     (pass-if-warnings
      (begin x (define x +))
      (w) (number? (string-contains w "`x' used before definition")))
     (pass-if-warnings
      (begin (set! x 1) (define x +))
      (w) (number? (string-contains w "`x' used before definition")))
     (pass-if-no-warnings
      (begin (lambda () x) (define x +)))
     (pass-if-no-warnings
      (begin (if (defined? 'x) x) (define x +))))

   (with-test-prefix "non-idempotent-definition"
     (define-syntax-rule (pass-if-warnings expr pat test)
       (pass-if 'expr
         (match (call-with-warnings
                 (lambda ()
                   (compile 'expr #:to 'cps
                            #:opts %opts-w-non-idempotent-definition)))
           (pat test)
           (_ #f))))

     (define-syntax-rule (pass-if-no-warnings expr)
       (pass-if-warnings expr () #t))

     (pass-if-no-warnings
      (begin (define - +) (define y -)))
     (pass-if-warnings
      (begin - (define - +))
      (w) (number? (string-contains w "non-idempotent binding for `-'")))
     (pass-if-warnings
      (begin (define y -) (define - +))
      (w) (number? (string-contains w "non-idempotent binding for `-'")))
     (pass-if-no-warnings
      (begin (lambda () -) (define - +)))
     (pass-if-no-warnings
      (begin (if (defined? '-) -) (define - +))))

   (with-test-prefix "arity mismatch"

     (pass-if "quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(cons 'a 'b) #:opts %opts-w-arity)))))

     (pass-if "direct application"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '((lambda (x y) (or x y)) 1 2 3 4 5)
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))
     (pass-if "local"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f (lambda (x y) (+ x y))))
                                (f 2))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "global"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(cons 1 2 3 4)
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "alias to global"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f cons)) (f 1 2 3 4))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "alias to lexical to global"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f number?))
                                (let ((g f))
                                  (f 1 2 3 4)))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "alias to lexical"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f (lambda (x y z) (+ x y z))))
                                (let ((g f))
                                  (g 1)))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "letrec"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(letrec ((odd?  (lambda (x) (even? (1- x))))
                                       (even? (lambda (x)
                                                (or (= 0 x)
                                                    (odd?)))))
                                (odd? 1))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "case-lambda"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(let ((f (case-lambda
                                       ((x)     1)
                                       ((x y)   2)
                                       ((x y z) 3))))
                              (list (f 1)
                                    (f 1 2)
                                    (f 1 2 3)))
                           #:opts %opts-w-arity
                           #:to 'cps)))))

     (pass-if "case-lambda with wrong number of arguments"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f (case-lambda
                                         ((x)     1)
                                         ((x y)   2))))
                                (f 1 2 3))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "case-lambda*"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(let ((f (case-lambda*
                                       ((x #:optional y) 1)
                                       ((x #:key y)      2)
                                       ((x y #:key z)    3))))
                              (list (f 1)
                                    (f 1 2)
                                    (f #:y 2)
                                    (f 1 2 #:z 3)))
                           #:opts %opts-w-arity
                           #:to 'cps)))))

     (pass-if "case-lambda* with wrong arguments"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f (case-lambda*
                                         ((x #:optional y) 1)
                                         ((x #:key y)      2)
                                         ((x y #:key z)    3))))
                                (list (f)
                                      (f 1 #:z 3)))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 2)
              (null? (filter (lambda (w)
                               (not
                                (number?
                                 (string-contains
                                  w "wrong number of arguments to"))))
                             w)))))

     (pass-if "top-level applicable struct"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(let ((p current-warning-port))
                             (p (+ (p) 1))
                             (p))
                          #:opts %opts-w-arity
                          #:to 'cps)))))

     (pass-if "top-level applicable struct with wrong arguments"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(let ((p current-warning-port))
                               (p 1 2 3))
                            #:opts %opts-w-arity
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "local toplevel-defines"
       (let ((w (call-with-warnings
                  (lambda ()
                    (let ((in (open-input-string "
                                (define (g x) (f x))
                                (define (f) 1)")))
                      (read-and-compile in
                                        #:opts %opts-w-arity
                                        #:to 'cps))))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "global toplevel alias"
       (let ((w (call-with-warnings
                  (lambda ()
                    (let ((in (open-input-string "
                                (define f cons)
                                (define (g) (f))")))
                      (read-and-compile in
                                        #:opts %opts-w-arity
                                        #:to 'cps))))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "local toplevel overrides global"
       (null? (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string "
                              (define (cons) 0)
                              (define (foo x) (cons))")))
                    (read-and-compile in
                                      #:opts %opts-w-arity
                                      #:to 'cps))))))

     (pass-if "keyword not passed and quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(let ((f (lambda* (x #:key y) y)))
                              (f 2))
                           #:opts %opts-w-arity
                           #:to 'cps)))))

     (pass-if "keyword passed and quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(let ((f (lambda* (x #:key y) y)))
                              (f 2 #:y 3))
                           #:opts %opts-w-arity
                           #:to 'cps)))))

     (pass-if "keyword passed to global and quiet"
       (null? (call-with-warnings
                (lambda ()
                  (let ((in (open-input-string "
                              (use-modules (system base compile))
                              (compile '(+ 2 3) #:env (current-module))")))
                    (read-and-compile in
                                      #:opts %opts-w-arity
                                      #:to 'cps))))))

     (pass-if "extra keyword"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(let ((f (lambda* (x #:key y) y)))
                                (f 2 #:Z 3))
                             #:opts %opts-w-arity
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments to")))))

     (pass-if "extra keywords allowed"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(let ((f (lambda* (x #:key y #:allow-other-keys)
                                       y)))
                              (f 2 #:Z 3))
                           #:opts %opts-w-arity
                           #:to 'cps))))))

   (with-test-prefix "format"

     (pass-if "quiet (no args)"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t "hey!")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "quiet (1 arg)"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t "hey ~A!" "you")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "quiet (2 args)"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t "~A ~A!" "hello" "world")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "wrong port arg"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format 10 "foo")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong port argument")))))

     (pass-if "non-literal format string"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format #f fmt)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "non-literal format string")))))

     (pass-if "non-literal format string using gettext"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t (gettext "~A ~A!") "hello" "world")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string using gettext as _"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t (G_ "~A ~A!") "hello" "world")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string using gettext as top-level _"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(begin
                             (define (_ s) (gettext s "my-domain"))
                             (format #t (G_ "~A ~A!") "hello" "world"))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string using gettext as module-ref _"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t ((@@ (foo) G_) "~A ~A!") "hello" "world")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string using gettext as lexical _"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(let ((_ (lambda (s)
                                      (gettext s "my-domain"))))
                             (format #t (G_ "~A ~A!") "hello" "world"))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string using ngettext"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t
                                   (ngettext "~a thing" "~a things" n "dom") n)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string using ngettext as N_"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(format #t (N_ "~a thing" "~a things" n) n)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "non-literal format string with (define _ gettext)"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(begin
                             (define _ gettext)
                             (define (foo)
                               (format #t (G_ "~A ~A!") "hello" "world")))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "wrong format string"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format #f 'not-a-string)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong format string")))))

     (pass-if "wrong number of args"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format "shbweeb")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "wrong number of arguments")))))

     (pass-if "~%, ~~, ~&, ~t, ~_, ~!, ~|, ~/, ~q and ~\\n"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) some-port
                            "~&~3_~~ ~\n~12they~% ~!~|~/~q")
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "one missing argument"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format some-port "foo ~A~%")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 0")))))

     (pass-if "one missing argument, gettext"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format some-port (gettext "foo ~A~%"))
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 0")))))

     (pass-if "two missing arguments"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f
                              "foo ~10,2f and bar ~S~%")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 2, got 0")))))

     (pass-if "one given, one missing argument"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format #t "foo ~A and ~S~%" hey)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 2, got 1")))))

     (pass-if "too many arguments"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '(format #t "foo ~A~%" 1 2)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 2")))))

     (pass-if "~h"
       (null? (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #t
                              "foo ~h ~a~%" 123.4 'bar)
                            #:opts %opts-w-format
                            #:to 'cps)))))

     (pass-if "~:h with locale object"
       (null? (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #t
                              "foo ~:h~%" 123.4 %global-locale)
                            #:opts %opts-w-format
                            #:to 'cps)))))

     (pass-if "~:h without locale object"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #t "foo ~,2:h" 123.4)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 2, got 1")))))

     (with-test-prefix "conditionals"
       (pass-if "literals"
        (null? (call-with-warnings
                (lambda ()
                  (compile '((@ (ice-9 format) format) #f "~A ~[foo~;bar~;baz~;~] ~10,2f"
                                    'a 1 3.14)
                           #:opts %opts-w-format
                           #:to 'cps)))))

       (pass-if "literals with selector"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~2[foo~;bar~;baz~;~] ~A"
                                       1 'dont-ignore-me)
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "expected 1, got 2")))))

       (pass-if "escapes (exact count)"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~[~a~;~a~]")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "expected 2, got 0")))))

       (pass-if "escapes with selector"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~1[chbouib~;~a~]")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "expected 1, got 0")))))

       (pass-if "escapes, range"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~[chbouib~;~a~;~2*~a~]")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "expected 1 to 4, got 0")))))

       (pass-if "@"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~@[temperature=~d~]")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "expected 1, got 0")))))

       (pass-if "nested"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~:[~[hey~;~a~;~va~]~;~3*~]")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "expected 2 to 4, got 0")))))

       (pass-if "unterminated"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "~[unterminated")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "unterminated conditional")))))

       (pass-if "unexpected ~;"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "foo~;bar")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "unexpected")))))

       (pass-if "unexpected ~]"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '((@ (ice-9 format) format) #f "foo~]")
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w)
                                          "unexpected"))))))

     (pass-if "~{...~}"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) #f "~A ~{~S~} ~A"
                                   'hello '("ladies" "and")
                                   'gentlemen)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~{...~}, too many args"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~{~S~}" 1 2 3)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 3")))))

     (pass-if "~@{...~}"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) #f "~@{~S~}" 1 2 3)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~@{...~}, too few args"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~A ~@{~S~}")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected at least 1, got 0")))))

     (pass-if "unterminated ~{...~}"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~{")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "unterminated")))))

     (pass-if "~(...~)"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) #f "~:@(~A ~A~)" 'foo 'bar)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~v"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~v_foo")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 0")))))
     (pass-if "~v:@y"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) #f "~v:@y" 1 123)
                          #:opts %opts-w-format
                          #:to 'cps)))))


     (pass-if "~*"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~2*~a" 'a 'b)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 3, got 2")))))

     (pass-if "~p"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(((@ (ice-9 format) format) #f "thing~p" 2))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~p, too few arguments"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~p")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 0")))))

     (pass-if "~:p"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(((@ (ice-9 format) format) #f "~d thing~:p" 2))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~:@p, too many arguments"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~d pupp~:@p" 5 5)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 2")))))

     (pass-if "~:@p, too few arguments"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "pupp~:@p")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 0")))))

     (pass-if "~?"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) #f "~?" "~d ~d" '(1 2))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~^"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) #f "~a ~^ ~a" 0 1)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "~^, too few args"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~a ~^ ~a")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected at least 1, got 0")))))

     (pass-if "parameters: +,-,#, and '"
       (null? (call-with-warnings
               (lambda ()
                 (compile '((@ (ice-9 format) format) some-port
                            "~#~ ~,,-2f ~,,+2f ~'A~" 1234 1234)
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (pass-if "complex 1"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f
                                     "~4@S    ~32S~@[;; ~1{~@?~}~]~@[~61t at ~a~]\n"
                                     1 2 3 4 5 6)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 4, got 6")))))

     (pass-if "complex 2"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f
                                     "~:(~A~) Commands~:[~; [abbrev]~]:~2%"
                                     1 2 3 4)
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 2, got 4")))))

     (pass-if "complex 3"
       (let ((w (call-with-warnings
                 (lambda ()
                   (compile '((@ (ice-9 format) format) #f "~9@a~:[~*~3_~;~3d~] ~v:@y~%")
                            #:opts %opts-w-format
                            #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 5, got 0")))))

     (pass-if "ice-9 format"
       (let ((w (call-with-warnings
                 (lambda ()
                   (let ((in (open-input-string
                              "(use-modules ((ice-9 format) #:prefix i9-))
                               (i9-format #t \"yo! ~A\" 1 2)")))
                     (read-and-compile in
                                       #:opts %opts-w-format
                                       #:to 'cps))))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "expected 1, got 2")))))

     (pass-if "not format"
       (null? (call-with-warnings
               (lambda ()
                 (compile '(let ((format chbouib))
                             (format #t "not ~A a format string"))
                          #:opts %opts-w-format
                          #:to 'cps)))))

     (with-test-prefix "simple-format"

       (pass-if "good"
         (null? (call-with-warnings
                 (lambda ()
                   (compile '(simple-format #t "foo ~a bar ~s ~%~~" 1 2)
                            #:opts %opts-w-format
                            #:to 'cps)))))

       (pass-if "wrong number of args"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '(simple-format #t "foo ~a ~s~%" 'one-missing)
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w) "wrong number")))))

       (pass-if "unsupported"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '(simple-format #t "foo ~x~%" 16)
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w) "unsupported format option")))))

       (pass-if "unsupported, gettext"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '(simple-format #t (gettext "foo ~2f~%") 3.14)
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w) "unsupported format option")))))

       (pass-if "unsupported, ngettext"
         (let ((w (call-with-warnings
                   (lambda ()
                     (compile '(simple-format #t (ngettext "s ~x" "p ~x" x) x)
                              #:opts %opts-w-format
                              #:to 'cps)))))
           (and (= (length w) 1)
                (number? (string-contains (car w) "unsupported format option")))))))

   (with-test-prefix "duplicate-case-datum"

     (pass-if "quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(case x ((1) 'one) ((2) 'two))
                           #:opts %opts-w-duplicate-case-datum
                           #:to 'cps)))))

     (pass-if "one duplicate"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(case x
                                ((1) 'one)
                                ((2) 'two)
                                ((1) 'one-again))
                             #:opts %opts-w-duplicate-case-datum
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "duplicate")))))

     (pass-if "one duplicate"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(case x
                                ((1 2 3) 'a)
                                ((1)     'one))
                             #:opts %opts-w-duplicate-case-datum
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "duplicate"))))))

   (with-test-prefix "bad-case-datum"

     (pass-if "quiet"
       (null? (call-with-warnings
                (lambda ()
                  (compile '(case x ((1) 'one) ((2) 'two))
                           #:opts %opts-w-bad-case-datum
                           #:to 'cps)))))

     (pass-if "not eqv?"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(case x
                                ((1)     'one)
                                (("bad") 'bad))
                             #:opts %opts-w-bad-case-datum
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "cannot be meaningfully compared")))))

     (pass-if "one clause element not eqv?"
       (let ((w (call-with-warnings
                  (lambda ()
                    (compile '(case x
                                ((1 (2) 3) 'a))
                             #:opts %opts-w-duplicate-case-datum
                             #:to 'cps)))))
         (and (= (length w) 1)
              (number? (string-contains (car w)
                                        "cannot be meaningfully compared"))))))

   (with-test-prefix "location"
     (define (call-with-fake-input-file filename contents thunk)
       (call-with-input-string contents
         (lambda (port)
           (set-port-filename! port filename)
           (thunk port))))

     (pass-if "unused variable"
       (let ((w (call-with-warnings
                 (lambda ()
                   (call-with-fake-input-file
                    "unused-variable.scm"
                    "\
(lambda (x)
  (let ((y (+ x 2)))
    x))"
                    (lambda (port)
                      (read-and-compile port #:opts %opts-w-unused #:to 'cps)))))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "unused variable `y'"))
              (number? (string-contains (car w) "unused-variable.scm:2:2")))))

     (pass-if "unbound variable (spaces)"
       (let ((w (call-with-warnings
                 (lambda ()
                   (call-with-fake-input-file
                    "unbound-spaces.scm"
                    "  (foo)"
                    (lambda (port)
                      (read-and-compile port #:opts %opts-w-unbound #:to 'cps)))))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "unbound variable `foo'"))
              (number? (string-contains (car w) "unbound-spaces.scm:1:3")))))

     (pass-if "unbound variable (tabs)"
       (let ((w (call-with-warnings
                 (lambda ()
                   (call-with-fake-input-file
                    "unbound-tabs.scm"
                    "\t\t(foo)"
                    (lambda (port)
                      (read-and-compile port #:opts %opts-w-unbound #:to 'cps)))))))
         (and (= (length w) 1)
              (number? (string-contains (car w) "unbound variable `foo'"))
              (number? (string-contains (car w) "unbound-tabs.scm:1:17")))))))

;; Local Variables:
;; eval: (put 'pass-if-primitives-resolved 'scheme-indent-function 1)
;; eval: (put 'pass-if-tree-il->scheme 'scheme-indent-function 1)
;; End:
