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;;;; syncase.test --- test suite for (ice-9 syncase) -*- scheme -*-
;;;;
;;;; Copyright (C) 2001, 2006, 2009, 2010, 2011, 2013, 2015 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
;; These tests are in a module so that the syntax transformer does not
;; affect code outside of this file.
;;
(define-module (test-suite test-syncase)
#:use-module (test-suite lib)
#:use-module (system base compile)
#:use-module (ice-9 regex)
#:use-module ((srfi srfi-1) :select (member)))
(define-syntax plus
(syntax-rules ()
((plus x ...) (+ x ...))))
(pass-if "basic syncase macro"
(= (plus 1 2 3) (+ 1 2 3)))
(pass-if "@ works with syncase"
(eq? run-test (@ (test-suite lib) run-test)))
(define-syntax string-let
(lambda (stx)
(syntax-case stx ()
((_ id body ...)
#`(let ((id #,(symbol->string
(syntax->datum #'id))))
body ...)))))
(pass-if "macro using quasisyntax"
(equal? (string-let foo (list foo foo))
'("foo" "foo")))
(define-syntax string-case
(syntax-rules (else)
((string-case expr ((string ...) clause-body ...) ... (else else-body ...))
(let ((value expr))
(cond ((member value '(string ...) string=?)
clause-body ...)
...
(else
else-body ...))))
((string-case expr ((string ...) clause-body ...) ...)
(let ((value expr))
(cond ((member value '(string ...) string=?)
clause-body ...)
...)))))
(define-syntax alist
(syntax-rules (tail)
((alist ((key val) ... (tail expr)))
(cons* '(key . val) ... expr))
((alist ((key val) ...))
(list '(key . val) ...))))
(with-test-prefix "with-syntax"
(pass-if "definitions allowed in body"
(equal? (with-syntax ((a 23))
(define b #'a)
(syntax->datum b))
23)))
(with-test-prefix "tail patterns"
(with-test-prefix "at the outermost level"
(pass-if "non-tail invocation"
(equal? (string-case "foo" (("foo") 'foo))
'foo))
(pass-if "tail invocation"
(equal? (string-case "foo" (("bar") 'bar) (else 'else))
'else)))
(with-test-prefix "at a nested level"
(pass-if "non-tail invocation"
(equal? (alist ((a 1) (b 2) (c 3)))
'((a . 1) (b . 2) (c . 3))))
(pass-if "tail invocation"
(equal? (alist ((foo 42) (tail '((bar . 66)))))
'((foo . 42) (bar . 66))))))
(with-test-prefix "serializable labels and marks"
(compile '(begin
(define-syntax duplicate-macro
(syntax-rules ()
((_ new-name old-name)
(define-syntax new-name
(syntax-rules ()
((_ . vals)
(letrec-syntax ((apply (syntax-rules ()
((_ macro args)
(macro . args)))))
(apply old-name vals))))))))
(define-syntax kwote
(syntax-rules ()
((_ arg1) 'arg1)))
(duplicate-macro kwote* kwote))
#:env (current-module))
(pass-if "compiled macro-generating macro works"
(eq? (eval '(kwote* foo) (current-module))
'foo)))
(with-test-prefix "changes to expansion environment"
(pass-if "expander detects changes to current-module with @@ @@"
(compile '(begin
(define-module (new-module))
(@@ @@ (new-module)
(define-syntax new-module-macro
(lambda (stx)
(syntax-case stx ()
((_ arg) (syntax arg))))))
(@@ @@ (new-module)
(new-module-macro #t)))
#:env (current-module))))
(define-module (test-suite test-syncase-2)
#:export (make-the-macro))
(define (hello)
'hello)
(define-syntax make-the-macro
(syntax-rules ()
((_ name)
(define-syntax name
(syntax-rules ()
((_) (hello)))))))
(define-module (test-suite test-syncase)) ;; back to main module
(use-modules (test-suite test-syncase-2))
(make-the-macro foo)
(with-test-prefix "macro-generating macro"
(pass-if "module hygiene"
(eq? (foo) 'hello)))
(pass-if "_ is a placeholder"
(equal? (eval '(begin
(define-syntax ciao
(lambda (stx)
(syntax-case stx ()
((_ _)
"ciao"))))
(ciao 1))
(current-module))
"ciao"))
(define qux 30)
(with-test-prefix "identifier-syntax"
(pass-if "global reference"
(let-syntax ((baz (identifier-syntax qux)))
(equal? baz qux)))
(pass-if "lexical hygienic reference"
(let-syntax ((baz (identifier-syntax qux)))
(let ((qux 20))
(equal? (+ baz qux)
50))))
(pass-if "lexical hygienic reference (bound)"
(let ((qux 20))
(let-syntax ((baz (identifier-syntax qux)))
(equal? (+ baz qux)
40))))
(pass-if "global reference (settable)"
(let-syntax ((baz (identifier-syntax
(id qux)
((set! id expr) (set! qux expr)))))
(equal? baz qux)))
(pass-if "lexical hygienic reference (settable)"
(let-syntax ((baz (identifier-syntax
(id qux)
((set! id expr) (set! qux expr)))))
(let ((qux 20))
(equal? (+ baz qux)
50))))
(pass-if "lexical hygienic reference (bound, settable)"
(let ((qux 20))
(let-syntax ((baz (identifier-syntax
(id qux)
((set! id expr) (set! qux expr)))))
(equal? (+ baz qux)
40))))
(pass-if "global set!"
(let-syntax ((baz (identifier-syntax
(id qux)
((set! id expr) (set! qux expr)))))
(set! baz 10)
(equal? (+ baz qux) 20)))
(pass-if "lexical hygienic set!"
(let-syntax ((baz (identifier-syntax
(id qux)
((set! id expr) (set! qux expr)))))
(and (let ((qux 20))
(set! baz 5)
(equal? (+ baz qux)
25))
(equal? qux 5))))
(pass-if "lexical hygienic set! (bound)"
(let ((qux 20))
(let-syntax ((baz (identifier-syntax
(id qux)
((set! id expr) (set! qux expr)))))
(set! baz 50)
(equal? (+ baz qux)
100)))))
(with-test-prefix "top-level expansions"
(pass-if "syntax definitions expanded before other expressions"
(eval '(begin
(define even?
(lambda (x)
(or (= x 0) (odd? (- x 1)))))
(define-syntax odd?
(syntax-rules ()
((odd? x) (not (even? x)))))
(even? 10))
(current-module))))
(define-module (test-suite test-syncase-3)
#:autoload (test-syncase-3-does-not-exist) (baz))
(define-module (test-suite test-syncase)) ;; back to main module
(pass-if "missing autoloads do not foil psyntax"
(parameterize ((current-warning-port (%make-void-port "w")))
(eval '(if #f (baz) #t)
(resolve-module '(test-suite test-syncase-3)))))
(use-modules (system syntax))
(with-test-prefix "syntax-local-binding"
(define-syntax syntax-type
(lambda (x)
(syntax-case x ()
((_ id resolve?)
(call-with-values
(lambda ()
(syntax-local-binding
#'id
#:resolve-syntax-parameters? (syntax->datum #'resolve?)))
(lambda (type value)
(with-syntax ((type (datum->syntax #'id type)))
#''type)))))))
(define-syntax-parameter foo
(syntax-rules ()))
(pass-if "syntax-parameters (resolved)"
(equal? (syntax-type foo #t) 'macro))
(pass-if "syntax-parameters (unresolved)"
(equal? (syntax-type foo #f) 'syntax-parameter)))
;; (put 'pass-if-syntax-error 'scheme-indent-function 1)
(define-syntax pass-if-syntax-error
(syntax-rules ()
((_ name pat exp)
(pass-if name
(catch 'syntax-error
(lambda () exp (error "expected syntax-error exception"))
(lambda (k who what where form . maybe-subform)
(if (if (pair? pat)
(and (eq? who (car pat))
(string-match (cdr pat) what))
(string-match pat what))
#t
(error "unexpected syntax-error exception" what pat))))))))
(with-test-prefix "primitives"
(pass-if-syntax-error "primref in default module"
"failed to match"
(macroexpand '(@@ primitive cons)))
(pass-if-syntax-error "primcall in default module"
"failed to match"
(macroexpand '((@@ primitive cons) 1 2)))
(pass-if-equal "primcall in (guile)"
'(1 . 2)
(@@ @@ (guile) ((@@ primitive cons) 1 2)))
(pass-if-syntax-error "primref in (guile)"
"not in operator position"
(macroexpand '(@@ @@ (guile) (@@ primitive cons)))))
(pass-if "infinite loop bug"
(begin
(macroexpand
'(let-syntax
((define-foo
(syntax-rules ()
((define-foo a b)
(begin
(define a '())
;; Oddly, the "*" in the define* seems to be
;; important in triggering this bug.
(define* (b) (set! a a)))))))
(define-foo a c)))
#t))
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