re2c is a c++ tool for writing fast and flexible scanners.
Questions tagged [re2c]
14 questions
4
votes
1 answer
RE2C How to discard current matched rule and keep trying?
Can a rule be conditionally discarded after being matched and continue to try other rules with lower precedence?
{rule} {
if(condition) {
return TOKEN;
}
// discard
// continue and try the other rules…
marcio
- 10,002
- 11
- 54
- 83
4
votes
3 answers
re2c scanners on C++ iterator source
I am attempting to use re2c with input defined with an iterator pair instead of a null terminated string.
From Manual:
YYCURSOR
[...]
On entry, YYCURSOR is assumed to point to the first character of the current token.
On exit, YYCURSOR will point…
JonT
- 502
- 4
- 13
3
votes
1 answer
Is there a good working tutorial on re2c + lemon?
I've tried a couple. And there is only a couple of tutorials in Google for re2c+lemon.
Currently for all examples I get similar bunch of errors like:
In file included from main.cpp:2:0:
parser.y:44:5: error: ‘yygotominor’ was not declared in this…
Sergey
- 19,487
- 13
- 44
- 68
3
votes
1 answer
YYSETSTATE how to know the identifier of YYFILL?
The manual clearly says:
YYSETSTATE (s)
[...]
The parameter to YYSETSTATE is a signed integer that uniquely identifies
the specific instance of YYFILL (n) that is about to be called.
[...]
The problem is, I'm calling my YYSETSTATE defined macro…
marcio
- 10,002
- 11
- 54
- 83
2
votes
1 answer
Syntax error from default rule "*"
When compiling (processing using re2c) the sample Recognizing integers: the sentinel method I get:
re2c : error : line 16, column 9: syntax error
It seems to be complaining about the "*". The following is my 01_recognizing_integers.re file (except…
Sam Hobbs
- 2,594
- 3
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- 32
2
votes
1 answer
Using re2c with ISO-8859-x
We have some text in ISO-8859-15 for which we want to tokenize. (ISO-8859-15 is ISO-8859-1 with the Euro sign and other common accented characters, for more details see ISO-8859-15).
I am trying to get the parser to recognize all the characters. The…
Yimin Rong
- 1,890
- 4
- 31
- 48
1
vote
1 answer
Lemon parser token value with void * type
I was trying to use void* type for my lemon parser but I got some weird problem.
Initially I used a custom token type, a struct to hold the values of token, then I switched to void* because my token value types vary.
Here is some of my parser…
Arif Balik
- 115
- 1
- 9
1
vote
1 answer
How to Install re2c on Linux Centos 7
I was trying to install the Mailparse PECL extension with WHM/cPanel and it kept failing because re2c was missing.
Jonathan Roy
- 903
- 11
- 20
1
vote
2 answers
Detecting IP address in RE2C
I am trying to write a regex to detect IP addresses and floating point number in re2c (http://re2c.org/). Here is the regex I am using
[-+]?[0-9]+[.][0-9]+ { RETURN(FLOAT); }
…
sushil
- 165
- 1
- 9
1
vote
1 answer
match beginning of line with re2c
i'm using re2c 0.10.5 and i can't match beginning of string properly.
For example, I defined:
[aA] w "=" { return ATTRKEYWORD;}
[bB] w "=" { return BWKEYWORD;}
where w is defined as:
w = s*;
but if i've the string…
junky
- 336
- 2
- 7
1
vote
1 answer
using YYLIMIT in re2c
Thank you in advance!
I'd like to implement a code to analysis ipv4 address format such as "192.168.0.0".
So, I did like this.
#include
#include
typedef struct qppLexerObj
{
char *mCursor;
char *mLimit;
char…
user3795944
0
votes
0 answers
Homebrew install: PHP dependency re2c can't find Python interpreter
I broke my PHP installation on MacOS Mojave, so I'm trying:
brew reinstall shivammathur/php/php@7.4
This goes well until reaching re2c:
==> Installing shivammathur/php/php@7.4 dependency: re2c
which fails with:
checking for a Python interpreter…
gl03
- 1,109
- 12
- 18
0
votes
1 answer
re2c: syntax error when trying to match string
I'm trying to use re2c, but it gives me a syntax error on this regex:
(["'])((\\{2})*|(.*?[^\\](\\{2})*))\1
What's wrong with it? This should match a doubly quoted or single quoted string
Astavie
- 91
- 1
- 8
0
votes
1 answer
How to match whitespace and comments with re2c
I started very recently to use bison for writing small compiler exercises. I am having some issues with white spaces ans comments. I was trying to debug the problem and I arrived to this source that looks like what I am looking for. I tried to…
Emanuele
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