Pascal not considered harmful - was Re: Rich kids are into COBOL
bqt at update.uu.se
Fri Feb 20 18:46:19 CST 2015
On 2015-02-21 01:02, Dave G4UGM wrote:
>> -----Original Message-----
>> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Chuck
>> Sent: 20 February 2015 23:00
>> To: General at classiccmp.org; Discussion at classiccmp.org:On-Topic and Off-
>> Topic Posts
>> Subject: Re: Pascal not considered harmful - was Re: Rich kids are into
>> On 02/20/2015 02:32 PM, Ali wrote:
>>> Excuse my ignorance but then how is a compiler written? I always
>>> thought that you would need to know op codes and assembler to write a
>> compiler. I.E.
>>> you can't write and efficient compiler by using a high level language.
> Almost all , so there exceptions, modern compliers are written in a high
> level language. Most use LEXX and YACC or their modern equivalents to
> generate the program fragments needed to generate the code.
Uh... LEX and YACC are used for the frontend side. They do not have
anything to do with code generation. :-)
Using LEX and YACC, you will still need to write the code that actually
generates the output from the whole thing. LEX and YACC essentially
implements the parsing of the source code for you.
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