Hans Aberg wrote:
> On 16 Nov 2006, at 11:41, Giampaolo Fadel wrote:
>
>> I need to write a simple compiler for a pascal-like linguage, using
>> flex and bison.
>> The language uses token as "INT" "BOOL" or "FALSE"; when I compile the
>> project using
>> Visual Studio 6.0 the following message is displayed:
>>
>> "'BOOL' : redefinition; typedef cannot be overloaded with any other
>> symbol"
>>
>> This is because in windef.h they are other defines of tokens "INT"
>> "BOOL" or "FALSE".
>> How can I resolve the question WITHOUT change the names of the tokens ??
>
> You can switch to a different platform.
Or, as a more constructive suggestion, you could use a prefix for the
token names in the grammar (T_BOOL, tBool, tokBOOL, etc. are all viable
alternatives). And you can always give them string names you use in the
grammar:
grammar: %token t_BOOL "BOOL"
lexer: "BOOL" { return t_BOOL; }
grammar: some_rule: some_other_rule "BOOL";
which ensures that bison syntax errors say they expect a BOOL rather
than a t_BOOL (only the lexer has to use the t_* names). This is
especially nice when the name for the token consists of multiple words:
%token t_DECIMAL_LITERAL "decimal literal"
_______________________________________________
[email protected] http://lists.gnu.org/mailman/listinfo/help-bison
