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A first, rough lexer for elisp still missing some stuff.

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* module/language/elisp/lexer.scm: New lexer file.
* test-suite/Makefile.am: Register elisp-reader.test as new test.
* test-suite/tests/elisp-reader.test: New test-case.
This commit is contained in:
Daniel Kraft 2009-08-26 14:32:48 +02:00
parent 157ffbd797
commit 25512a940b
3 changed files with 250 additions and 0 deletions
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1
test-suite/Makefile.am
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@ -33,6 +33,7 @@ SCM_TESTS = tests/alist.test \
tests/continuations.test \
tests/elisp.test \
tests/elisp-compiler.text \
tests/elisp-reader.text \
tests/environments.test \
tests/eval.test \
tests/exceptions.test \

87
test-suite/tests/elisp-reader.test Normal file
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@ -0,0 +1,87 @@
;;;; 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))
; ==============================================================================
; Test the lexer.
; This is of course somewhat redundant with the full parser checks, but probably
; can't hurt and is useful in developing the lexer itself.
(define (get-string-lexer str)
(call-with-input-string str get-lexer))
(define (lex-string str)
(let ((lexer (get-string-lexer str)))
(let iterate ((result '()))
(let ((token (lexer)))
(if (eq? token '*eoi*)
(reverse result)
(iterate (cons token result)))))))
(with-test-prefix "Lexer"
(let ((lexer (get-string-lexer "")))
(pass-if "end-of-input"
(and (eq? (lexer) '*eoi*)
(eq? (lexer) '*eoi*)
(eq? (lexer) '*eoi*))))
(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) (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)))))