Top-down parsing LL The easiest way of parsing something according to a grammar in use today is called LL parsing or top-down parsing. It works like this:
Maybe this interests you http: The problem with yacc-parsers is that they include C code, and part of the parser usually consists of work-arounds around C or yacc at least the ones I've written.
A yacc-parser isn't half as elegant as, say, a parser in SML-yacc. I haven't tried the Lisp ones, yet. So I think it would be really hard to auto-translate a yacc program into a Lisp program.
Your best bet is to hand-translate the yacc grammar into CL-yacc or what other tools there are.
Don't unless you want to spend weeks just debugging your parser I think C would be far too complex and weird grammar-wise to allow nice hand-written parsers. Is Emacs Lisp inappropriate somehow? It's already doing a plethora of languages.
Thanks for this tip - I never heard of the Bovinator before. I looked at it and it doesn't seem to fit. First, it's not a full parser - the author explicitly states that it's good for source analysis, not full-expression parsing for compilation.
Second, it's rather heavy - lots of. It is used by the regexp package to parse PERL's boiled-frog string syntax into a reasonable parse tree that can be processed by the FSM generator.
Unfortunately, it isn't documented so it isn't yet really usable for other purposes. The documentation and some tutorial material is on my to-do list. However, it is widely acknowledged that parsing C is a rather ugly problem, more work than it is worth. I would suggest you duct tape some existing parser onto your front end and see how Lisp works for the interesting stuff.
If your compiler works really well and you want to make it independently portable, that would be the time to deal with the unpleasant task of parsing. It's not pure Lisp, however, and that's pity C Use Zebu http: Zebu is a CL parser generator for CL.
D There are sources available for a C compiler written in Zetalisp http: Cliki says it is not trivially portable, but perhaps ripping out the parser and porting it to CL is not as difficult.
I have no idea though, since I've only briefly looked at the sources. I agree with Steven that the parsing is probably the least interesting part of your project, so just find something that works and move on to the interesting things.
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You can always replace it later. I've ripped out the lexer, parser and pretty-printer from my current development sources and put them on http: I would appreciate it, however, if you could make sure to credit me as the original author in the documentation of any software that uses these sources.writing a C compiler in Common Lisp Hi all, I've read in several places (and it appears often in this group) that Lisp is good for writing compilers/interpreters.
I'm now thinking of undertaking a project to prove that (at least to myself). OS Related Pointers. Indices about OSes and related subjects: The FAQ from the timberdesignmag.comch newsgroup; also its archive; it is a good FAQ, and anyone interested in OS implementation should have read it.
timberdesignmag.com's operating systems index, sorted by date of discovery (not updated in a while).; Brad Appleton's links to operating systems . Parallax Scrolling, Java Cryptography, YAML, Python Data Science, Java i18n, GitLab, TestRail, VersionOne, DBUtils, Common CLI, Seaborn, Ansible, LOLCODE, Current.
The Eclipse Foundation - home to a global community, the Eclipse IDE, Jakarta EE and over open source projects, including runtimes, tools and frameworks.
An introduction to BNF and EBNF, two ways of formally defining languages. GCL is the official Common Lisp for the GNU project. Its design makes use of the system's C compiler to compile to native object code, providing for both good performance and facile portability.