pega-texto
packcc
pega-texto | packcc | |
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2 | 2 | |
17 | 317 | |
- | - | |
0.0 | 4.3 | |
about 2 years ago | 9 days ago | |
C | C | |
The Unlicense | GNU General Public License v3.0 or later |
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pega-texto
packcc
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A glimpse into the universe where Windows died with the 1980s
There are languages with perfectly clean grammars which can't be parsed by yacc because they aren't LALR(1).
I agree that a command processor should have a grammar that can be expressed in a well-known formalism, and its parser generated by a parser generator.
I agree that both POSIX shell and CMD.EXE are flawed because that isn't true.
What I'm disagreeing with, is that it is important that the grammar formalism be LALR(1) in particular, and that the parser generator be yacc in particular.
Suppose I have a Packrat parser generator. [0] And my command processor has a nice clean PEG grammar. And I use the Packrat parser generator to generate the parser of my command processor. That grammar quite possibly isn't LALR(1), and hence yacc in particular won't be able to generate a parser for it. But what's the problem with that? If it is a problem at all, it is a very different problem than the problem that CMD.EXE and POSIX shell have
[0] e.g. https://github.com/arithy/packcc
- PackCC a PEG parser generator for C
What are some alternatives?
stb - stb single-file public domain libraries for C/C++
rust-peg - Parsing Expression Grammar (PEG) parser generator for Rust
npeg - PEGs for Nim, another take
PeppaPEG - PEG Parser in ANSI C
cparse - cparse is an LR(1) and LALR(1) parser generator