On Sun, 17 Feb 2019 18:43:38 +0100, workbe...@gmx.at wrote:
> Now a very simple question: i have this lexer.l file:
Suggestions for lines you might want to use instead to get things up and
running:
> [a-zA-Z]{ strcpy(yytext, yyltext); return STRING; }
[a-zA-Z]+{ strcpy(yyltext, yytext
I think the following should fix the compile errors. Presumably they are
prompted by compilers more sensitive nowadays than they were back in the days
when this book was written:
- lexer.l: remove the declaration enum yytokentype which is shipped by
including parser.tab.h
- parser.y: add forwar
I found the solution, my [a-zA-Z] had not + at the end so he only
recognized single characters instead of strings.. now it's working, thank
best reagrds!
On 17.02.19 19:51, Uxio Prego wrote:
What are you feeding?
What is happening?
What are you expecting instead?
On 17 Feb 2019, at 18:43, wo
What are you feeding?
What is happening?
What are you expecting instead?
> On 17 Feb 2019, at 18:43, workbe...@gmx.at wrote:
>
> Now a very simple question: i have this lexer.l file:
>
> [...]
> [a-zA-Z]{ strcpy(yytext, yyltext); return STRING; }
> [0-9]+{ yylval = atoi(yytext); ret
Now a very simple question: i have this lexer.l file:
%{
#include
#include
enum yytokentype {
NUMBER = 285,
VAL = 292,
ADD = 286,
SUB = 287,
MUL = 288,
DIV = 289,
ABS = 290,
EOL = 291,
STRING = 292
};
int yylval;
char yyltext[256];
%}
%%
"+"
>> Le 17 févr. 2019 à 14:17, workbe...@gmx.at a écrit :
>>
>> Is there a way i can put my c source code not inside one the the lexer.l or
>> parser.y files ? so i can keep tem separate from the rules ?
Two opposite answers:
I said:
> Le 17 févr. 2019 à 15:49, Akim Demaille a écrit :
>
> N
Hi,
>> I can't get i compile and if i get i compile by hand i get errors ...
>> please can someone help me out here,
>> the book doens't go to much into detail about this topic.
Can't help without actual commands and actual error messages.
> Le 17 févr. 2019 à 14:17, workbe...@gmx.
Yes of course, by inclusion of headers, in a very much
common way. You can then manipulate shorter *.y and
*.l docs, but this is not going to fix any Bison usage issue
you are having.
If yours is a serious book, it should have made a small
annex stating which versions of Flex and Bison the book
ex
Is there a way i can put my c source code not inside one the the lexer.l
or parser.y files ? so i can keep tem separate from the rules ?
best regards!
On 17.02.19 13:24, workbe...@gmx.at wrote:
For a beginner it's hard to find what i've to write, on what
documentation should i refer to ? to o
For a beginner it's hard to find what i've to write, on what
documentation should i refer to ? to original bison & flex manual
respectiveley ?
best regards!
On 17.02.19 13:22, workbe...@gmx.at wrote:
So my Bison and Flex code is out of date ?
On 17.02.19 13:04, Uxio Prego wrote:
Hi,
revi
So my Bison and Flex code is out of date ?
On 17.02.19 13:04, Uxio Prego wrote:
Hi,
review your Makefile, it has errors. Read the Make docs,
the basic use is:
TARGET: DEPENDENCIES
ACTIONS_THAT_USE_DEPENDENCIES_TO_UPDATE_TARGET
You might want to try emulating Yacc if the booking
Hi,
review your Makefile, it has errors. Read the Make docs,
the basic use is:
TARGET: DEPENDENCIES
ACTIONS_THAT_USE_DEPENDENCIES_TO_UPDATE_TARGET
You might want to try emulating Yacc if the booking you
are using is enough old and in case current Bison could
not be able to really foll
I've managed to come a bit more forward, now my lexer.l files look like
this:
%{
#include
#include
#include "./parser.tab.h"
enum yytokentype {
NUMBER = 285,
VAL = 292,
ADD = 286,
SUB = 287,
MUL = 288,
DIV = 289,
ABS = 290,
EOL = 291
};
int yylval;
%}
%%
"+
I've missed to remove some code from the lexer.l file:
%{
#include
#include
#include "./parser.tab.h"
enum yytokentype {
NUMBER = 285,
VAL = 292,
ADD = 286,
SUB = 287,
MUL = 288,
DIV = 289,
ABS = 290,
EOL = 291
};
int yylval;
char *value = NULL;
i'm new to Flex and Bison and are currently reading the book "Flex and
Bison" and have a few troubles understanding things correctly.
First of all i've troubles compiling the first example that uses both,
Flex and Bison. Flex compilation was easy but with Biton i've troubles,
first the exampl
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