similar to: [LLVMdev] [SPIRIT2] Grammar creation

Has anyone seen any attempts to give Markdown a PEG (parsing expressions grammar) recognizable by some ruby PEG parser generator grammar like Treetop? http://treetop.rubyforge.org/

I recently subscribed and saw in the archive that Eric Astor was asking for a formal grammar (unlikely the first time for such request.) Currently there are a few problems in making such a thing so I was curious if Mr. Gruber has made any thoughts about moving toward one? This would also allow a more ?clean? parser which would get rid of some of the current problems (bad nesting[^1],

Has anyone written a grammar for LLVM for ANTLR. I mean an ANTLR grammar that parses LLVM instructions. Is an LLVM grammar available for any other parsing tool? Surinder

There's been a lot of discussion on this list about creating a formal grammar for markdown. I had a go at writing a [parsing expression grammar] for markdown. I used Haskell and John Meacham's Frisby PEG parsing library, but it should not be too hard to port the grammar to PEG libraries in other languages. [parsing expression grammar]:

Hello Surinder, The existing hand-written parser is callable from almost anywhere so the only reason you'd need to have a parser for it would be to extend it. Originally it was written using Flex and Bison but Chris Lattner rewrote it from scratch to catch more errors at the parsing stage. The only feature I've found to be missing from the existing LLVM-AS utility was an include

Hi everyone, Today I tried to use the CD-ROM that came with my "Cambridge Grammar of English" on Ubuntu 8.10 and Wine 1.1.14 The install went ok, but when I try to run it I get the following error: Code: $ wine start 'C:\Program Files\Cambridge\Cambridge Grammar of English\cge.exe' fixme:exec:SHELL_execute flags ignored: 0x00000100 vwilson at

Hello Tim, Thank you for getting back to me. The language grammar as defined by the LLVM Language Reference Manual [1] does not include the details of the LLVM IR parser reference implementation. The following extract from "lib/AsmParser/LLParser.cpp" illustrates that unnamed globals are allowed [2]. > /// ParseUnnamedGlobal: > /// OptionalVisibility (ALIAS | IFUNC) ...

Hi Sam, Thanks for your reply. I am implementing my research (http://www.it.usyd.edu.au/~suri/Detecting%20Buffer%20Over.pdf), a translation of LLVM to a simple non-deterministic language to detect buffer overflows. It involves (1) printing a control flow graph of basic blocks of a function (easily done) (2) translating each llvm statement to a corresponding data flow language (needs ASTs to

Hello everyone, While developing a parser for LLVM IR, I seem to have stumbled upon a potential ambiguity in the LLVM IR assembly language grammar. Most likely there is something which I may have overlooked, so wanted to reach out to a more experienced crowed for some feedback. How would the following set of tokens be interpreted [1]? declare void @foo() unnamed_addr global i32 42 As far as

Vijay Daultani wrote: > Respected Sir/Madam, > > As I was developing some part of compiler for a project. I require grammar > (BNF or EBNF) for converting the C code in the IR as it is not been > mentioned any where over your official website. I don't know what you mean by "converting the C code in the IR". Regardless, LLVM does not have BNF or EBNF forms (or any

I am curious how do you guys do it anyways? On Mon, Jul 29, 2013 at 3:27 AM, Nick Lewycky <nicholas at mxc.ca> wrote: > Vijay Daultani wrote: > >> Respected Sir/Madam, >> >> As I was developing some part of compiler for a project. I require grammar >> (BNF or EBNF) for converting the C code in the IR as it is not been >> mentioned any where over your

I would like to make a couple of small changes to the R grammar. At present, operators like ~, ==, !=, <, <=, >, >= are declared to be non-associative. This means that things like a < b <= c produce a "syntax error" message when typed. I would like to change the grammar so that these operators are left-associative. I want to make this change so that mathematical

I've just uploaded an implementation of markdown in C. It defines the syntax using a PEG grammar, so it should be easy to extend and modify. Right now it can produce output in either HTML or LaTeX, but it would be simple to add other output formats. It's very fast: on my machine, it converts a 178K markdown file in 0.14 seconds (vs. 9.6 seconds for the latest Markdown.pl and 0.57 seconds

>Neither C-- nor LLVM provide this.  Why do you need a GLR parser >specifically? http://www.cs.berkeley.edu/~smcpeak/elkhound/ Parsing with arbitrary context-free grammars has two key advantages: (1) unbounded lookahead, and (2) support for ambiguous grammars. Unbounded lookahead is achieved by allowing multiple potential parses to coexist for as long as necessary. Similarly, ambiguity

Here is another implementation of Markdown, this time in c++ using the Boost Spirit library. Spirit Markdown is written in (hopefully!) idiomatic modern c++ and a full suite of unit tests are provided. It is licensed under the Boost Software License (OSI compliant). The purpose of writing this is: * for me to gain expertise in the use of Spirit, both through direct experience and public review,

Dear R developers: I am a PHD candidate student in the school of public health of Peking University and my major is genetic epidemiology. I am learning the FAM-MDR algorithm, which is used to detect the gene-gene and gene-environment interactions in the data of pedigree. The codes were written by Tom Cattaert of the University of Liege. The algorithms and the sample datasets are available at

On 10/20/2011 07:42 AM, Duncan Sands wrote: >> For the level of specificity you're looking for, just the source code itself. The LLVM IR language documentation is not, and isn't intended to be, a true language standard document in the same way that the C or C++ standards are. For any given case, check the docs first, and if your question isn't answered there, check the source

Hey Zed, any chance you mind sharing the grammar file you use with lemon to create the parser? I''ve been meaning to sit down and learn how to use one of those things. If not, any suggestions on a good resource for learning how to use a LALR parser?

Hello, Does a LL(k) grammar of LLVM assembly language exist somewhere ? Thanks JC

On 2016-05-26 02:42, Tim Northover via llvm-dev wrote: > On 25 May 2016 at 16:10, Robin Eklind via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> declare void @foo() unnamed_addr >> global i32 42 > > Doesn't a global have to be named? The syntax in the IR reference > doesn't make it optional: > > @<GlobalVarName> = [Linkage]