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;;;; elisp-reader.test --- Test the reader used by the Elisp compiler.
;;;;
;;;; Copyright (C) 2009 Free Software Foundation, Inc.
;;;; Daniel Kraft
;;;;
;;;; 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-elisp-reader)
:use-module (test-suite lib)
:use-module (language elisp lexer)
:use-module (language elisp parser))
; ==============================================================================
; Test the lexer.
(define (get-string-lexer str)
(call-with-input-string str get-lexer))
(define (lex-all lexer)
(let iterate ((result '()))
(let ((token (lexer)))
(if (eq? (car token) 'eof)
(reverse result)
(iterate (cons token result))))))
(define (lex-string str)
(lex-all (get-string-lexer str)))
(with-test-prefix "Lexer"
(let ((lexer (get-string-lexer "")))
(pass-if "end-of-input"
(and (eq? (car (lexer)) 'eof)
(eq? (car (lexer)) 'eof)
(eq? (car (lexer)) 'eof))))
(pass-if "single character tokens"
(equal? (lex-string "()[]'`,,@ . ")
'((paren-open . #f) (paren-close . #f)
(square-open . #f) (square-close . #f)
(quote . #f) (backquote . #f)
(unquote . #f) (unquote-splicing . #f) (dot . #f))))
(pass-if "whitespace and comments"
(equal? (lex-string " (\n\t) ; this is a comment\n. ; until eof")
'((paren-open . #f) (paren-close . #f) (dot . #f))))
(pass-if "source properties"
(let ((x (car (lex-string "\n\n \n . \n"))))
(and (= (source-property x 'line) 4)
(= (source-property x 'column) 3))))
(pass-if "symbols"
(equal? (lex-string "foo FOO char-to-string 1+ \\+1
\\(*\\ 1\\ 2\\)
+-*/_~!@$%^&=:<>{}
abc(def)ghi .e5")
`((symbol . foo) (symbol . FOO) (symbol . char-to-string)
(symbol . 1+) (symbol . ,(string->symbol "+1"))
(symbol . ,(string->symbol "(* 1 2)"))
(symbol . +-*/_~!@$%^&=:<>{})
(symbol . abc) (paren-open . #f) (symbol . def)
(paren-close . #f) (symbol . ghi) (symbol . .e5))))
; Here we make use of the property that exact/inexact numbers are not equal?
; even when they have the same numeric value!
(pass-if "integers"
(equal? (lex-string "-1 1 1. +1 01234")
'((integer . -1) (integer . 1) (integer . 1) (integer . 1)
(integer . 1234))))
(pass-if "floats"
(equal? (lex-string "1500.0 15e2 15.e2 1.5e3 .15e4 -.345e-2")
'((float . 1500.0) (float . 1500.0) (float . 1500.0)
(float . 1500.0) (float . 1500.0)
(float . -0.00345))))
; Check string lexing, this also checks basic character escape sequences
; that are then (hopefully) also correct for character literals.
(pass-if "strings"
(equal? (lex-string "\"foo\\nbar
test\\
\\\"ab\\\"\\\\ ab\\ cd
\\418\\0415\\u0041\\U0000000A\\Xab\\x0000000000000004fG.\" ")
'((string . "foo\nbar
test\"ab\"\\ abcd
!8!5A\nXabOG."))))
(pass-if "ASCII control characters and meta in strings"
(equal? (lex-string "\"\\^?\\C-a\\C-A\\^z\\M-B\\M-\\^@\\M-\\C-a\"")
'((string . "\x7F\x01\x01\x1A\xC2\x80\x81"))))
; Character literals, taking into account that some escape sequences were
; already checked in the strings.
(pass-if "characters"
(equal? (lex-string "?A?\\z ? ?\\x21 ?\\^j ?\\\\?\\n?\\\n")
`((character . 65) (character . ,(char->integer #\z))
(character . 32) (character . ,(char->integer #\!))
(character . 10) (character . ,(char->integer #\\))
(character . 10) (character . 10))))
(pass-if "meta characters"
(equal? (map cdr (lex-string "?\\C-[?\\M-\\S-Z?\\^X?\\A-\\s-\\H-\\s"))
`(,(+ (expt 2 26) (char->integer #\[))
,(+ (expt 2 27) (expt 2 25) (char->integer #\Z))
,(- (char->integer #\X) (char->integer #\@))
,(+ (expt 2 22) (expt 2 23) (expt 2 24) 32))))
(pass-if "circular markers"
(equal? (lex-string "#0342= #1#")
'((circular-def . 342) (circular-ref . 1))))
(let* ((lex1-string "#1='((1 2) [2 [3]] 5)")
(lexer (call-with-input-string (string-append lex1-string " 1 2")
get-lexer/1)))
(pass-if "lexer/1"
(and (equal? (lex-all lexer) (lex-string lex1-string))
(eq? (car (lexer)) 'eof)
(eq? (car (lexer)) 'eof)))))
; ==============================================================================
; Test the parser.
(define (parse-str str)
(call-with-input-string str read-elisp))
(with-test-prefix "Parser"
(pass-if "only next expression"
(equal? (parse-str "1 2 3") 1))
(pass-if "source properties"
(let* ((list1 (parse-str "\n\n (\n(7) (42))"))
(list2 (car list1))
(list3 (cadr list1)))
(and (= (source-property list1 'line) 3)
(= (source-property list1 'column) 4)
(= (source-property list2 'line) 4)
(= (source-property list2 'column) 1)
(= (source-property list3 'line) 4)
(= (source-property list3 'column) 6))))
(pass-if "constants"
(and (equal? (parse-str "-12") -12)
(equal? (parse-str ".123") 0.123)
(equal? (parse-str "foobar") 'foobar)
(equal? (parse-str "\"abc\"") "abc")
(equal? (parse-str "?A") 65)
(equal? (parse-str "?\\C-@") 0)))
(pass-if "quotation"
(and (equal? (parse-str "'(1 2 3 '4)")
'(quote (1 2 3 (quote 4))))
(equal? (parse-str "`(1 2 ,3 ,@a)")
'(#{`}# (1 2 (#{,}# 3) (#{,@}# a))))))
(pass-if "lists"
(equal? (parse-str "(1 2 (3) () 4 (. 5) (1 2 . (3 4)) (1 . 2) . 42)")
'(1 2 (3) () 4 5 (1 2 3 4) (1 . 2) . 42)))
(pass-if "vectors"
(equal? (parse-str "[1 2 [] (3 4) \"abc\" d]")
#(1 2 #() (3 4) "abc" d)))
(pass-if "circular structures"
(and (equal? (parse-str "(#1=a #2=b #1# (#1=c #1# #2#) #1#)")
'(a b a (c c b) c))
(let ((eqpair (parse-str "(#1=\"foobar\" . #1#)")))
(eq? (car eqpair) (cdr eqpair)))
(let ((circlst (parse-str "#1=(42 #1# #1=5 #1#)")))
(and (eq? circlst (cadr circlst))
(equal? (cddr circlst) '(5 5))))
(let ((circvec (parse-str "#1=[a #1# b]")))
(eq? circvec (vector-ref circvec 1))))))
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