Compiling the Example Program Perform the following steps to create the example program using lex and yacc: Process the yacc grammar file using the -d flag. The -d flag tells yacc to create a file that defines the tokens it uses in addition to the C language source code.
LEX & YACC Release Notes MKS LEX & YACC Release Notes Release 3.3.1 MKS Software Inc. 12450 Fair Lakes Circle, Suite 400 Fairfax VA 22033 USA Support: +1-703-803-7660 +1-703-803-3343 March 2001 Contents Changes in MKS LEX & YACC Release 3.3.1 include:. The -i option has been added to the lex command to make it easier to use mulitple grammars (each with its own lexical analyer) in a single program. The reference pages have been updated to match the format of the MKS Toolkit reference pages. The -v and -V options for the yacc command now behave properly when reduce errors occur. LEX now features improved generation of #line directives.
YACC features improved handling of large grammars. The -p option for both the lex and yacc commands now replace all appropriate prefixes. Support for Microsoft Windows Millennium has been added. For more information on these changes, see below. MKS LEX & YACC Release 3.3 features the following changes from previous releases:. Increased support for Windows development.
This includes the new LEX & YACC add-in for Microsoft Visual Studio 6.0. Complete online documentation. Support for DOS, OS/2, and Pascal has been dropped. LEX & YACC now generate tables that do not cause truncation warnings with the Microsoft Visual C compiler or other compilers that are strict about ANSI C compliance.
Code generated with the -w option of lex and yacc no longer causes compiler errors due to the use of the far keyword. Documentation for MKS LEX & YACC is divided into two parts:. HTML Help files. ASCII reference pages To properly read the online HTML Help files, you must have Microsoft Internet Explorer 4.0 or later installed on your system. It does not need to be your default browser. The HTML Help files provide the following documentation:. LEX & YACC Tutorial.
![Lex And Yacc Program For Infix To Prefix Lex And Yacc Program For Infix To Prefix](/uploads/1/2/5/6/125609381/888304370.jpg)
LEX Programming Guide. YACC Programming Guide. LEX & YACC Reference Pages. LEX & YACC Release Notes You can access the online reference pages for the command line utilities provided in MKS LEX & YACC either through the Help button of the Microsoft Visual Studio add-in or by using the command line man utility to view the ASCII reference pages. To access a command's reference page, type man cmdname For example, to get the reference page for the yacc command, you would type man yacc To access a miscellaneous information page, type man 5 pagename For example, to see the miscellaneous information page for yacc, you would type man 5 yacc MKS LEX & YACC 3.3.1 supports the following platforms:.
Windows 2000 for Intel processors. Windows NT version 4.0 for Intel processors. Windows 95/98/Millennium Note the Microsoft Visual Studio add-in does not work for versions of Visual Studio before 6.0.
To uninstall MKS LEX & YACC:. Run Add/Remove Programs from the control panel. Remove MKS LEX & YACC. There is a known problem uninstalling MKS LEX & YACC on Windows 2000 using the control panel's Add/Remove Programs application. The uninstall information is not deleted and the Start menu is not cleaned up.
All other executable and support files are removed. Attempting to run the Lex and Yacc Configuration item from the Start menu or to uninstall MKS LEX & YACC again from the control panel results in a ' Fatal error during installation' message being displayed.
To completely uninstall MKS LEX & YACC on Windows 2000, run setup.exe from the original distribution media and select Remove from the opening screen. When you have both MKS LEX & YACC and MKS Toolkit (Version 7.0+) installed on your system, several issues arise because of the inclusion of the SCO versions of the lex and yacc utilities in MKS Toolkit for Enterprise Developers. Getting the Right Reference Pages On a system with both MKS LEX & YACC and MKS Toolkit, typing one of the following: man lex man yacc displays the plain text version of the reference page for SCO lex or SCO yacc, respectively. To display the plain text reference pages for the MKS lex and yacc utilities, you must type one of these commands: man mkslex man mksyacc Also, the HTML Help versions of the MKS LEX & YACC reference pages are not viewable with the MKS Toolkit man -h command. You can view them as described earlier or by typing%ROOTDIR%/etc/help/lyref.chm at the Windows NT/2000 command prompt or $ROOTDIR/etc/help/lyref.chm at the MKS KornShell command prompt.
Getting the Right Executable On a system with both MKS LEX & YACC and MKS Toolkit for Enterprise Developers installed, you should ensure rootdir /mksnt comes before rootdir /bin (where rootdir is the directory in which) in your Path environment variable value. This ensures that you are running the lex and yacc utilities from MKS LEX & YACC as opposed to the SCO lex and yacc utilities from MKS Toolkit. To access the SCO versions, you can type one of the following at the Windows NT/2000 command prompt:%ROOTDIR%/bin/lex%ROOTDIR%/bin/yacc or one of these at the MKS KornShell command prompt: $ROOTDIR/bin/lex $ROOTDIR/bin/yacc To receive support for your MKS Software product, you must buy a Preferred Customer Support (PCS) contract for that product. Some MKS Software products come bundled with PCS. For others, PCS is optional.
PCS is renewable annually for a small fee and entitles you to unlimited customer support, patches, bug fixes, and all product upgrades for the duration of the contract. In any given 12-month period, MKS Software typically releases one minor upgrade (maintenance), one major upgrade (new features), and several patches, none of which you will want to miss. In addition, customers with PCS may elect to receive periodic mailings from our customer support organization.
These mailingsgeared at end usersoutline new features, give tips for using features, discuss how to solve common problems, and provide other frequently requested information. Moreover, as MKS Software moves more of its internal support information onto the support web site, only those customers with PCS will be able to access this controlled information, that will include instant status about reported issues, a searchable database of frequently asked questions, and much more detailed self-help information. If you are a new customer or you have never activated your PCS account, you must register with our customer support organization. Registrationmandatory before you can receive supportis simple. The easiest way to register is by filling out the registration form during product installation, or you may do so at any time over the web at. And please be assured that this information is used for no other purpose than to provide support to you. Your personal information will not be given to anyone else.
Without PCS, you will not be entitled to any support, patches, bug fixes, upgrades, mailings, or self-help information. If you do not have PCS, all of our sales channels offer MKS Software products with bundled PCS for your convenience. If you already have product, but need PCS, you may purchase a PCS contract by contacting MKS Software directly at 800-637-8034 or +1-703-803-3343. With PCS, you can request customer support by contacting us using one of the means listed below and in your request, include the name and version number of the product that you are using, your serial number, and the operating system and version/patch level that you are using. Contact MKS Software customer support at:. Web: E-mail: Telephone: +1-703-803-7660 (9:00am to 7:00pm Eastern, Mon-Fri) Fax: +1-703-803-3344.
MKS Software Web Site:. MKS LEX & YACC Homepage:. MKS Software Technical Support: The following table documents issues that were fixed in this release.