// d.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_D_PARSER_H
#define OHCOUNT_D_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *D_LANG = LANG_DMD;
// the languages entities
const char *d_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
D_SPACE = 0, D_COMMENT, D_STRING, D_ANY
};
/*****************************************************************************/
%%{
machine d;
write data;
include common "common.rl";
# Line counting machine
action d_ccallback {
switch(entity) {
case D_SPACE:
ls
break;
case D_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(D_LANG)
break;
case NEWLINE:
std_newline(D_LANG)
}
}
action d_comment_nc_res { nest_count = 0; }
action d_comment_nc_inc { nest_count++; }
action d_comment_nc_dec { nest_count--; }
d_line_comment =
'//' @comment (
escaped_newline %{ entity = INTERNAL_NL; } %d_ccallback
|
ws
|
(nonnewline - ws) @comment
)*;
d_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %d_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
d_nested_comment =
'/+' >d_comment_nc_res @comment (
newline %{ entity = INTERNAL_NL; } %d_ccallback
|
ws
|
'/+' @d_comment_nc_inc @comment
|
'+/' @d_comment_nc_dec @comment
|
^space @comment
)* :>> ('+/' when { nest_count == 0 }) @comment;
d_comment = d_line_comment | d_block_comment | d_nested_comment;
d_sq_str =
'\'' @code (
escaped_newline %{ entity = INTERNAL_NL; } %d_ccallback
|
ws
|
[^\t '\\] @code
|
'\\' nonnewline @code
)* '\'';
d_dq_str =
'"' @code (
escaped_newline %{ entity = INTERNAL_NL; } %d_ccallback
|
ws
|
[^\t "\\] @code
|
'\\' nonnewline @code
)* '"';
d_bt_str =
'`' @code (
escaped_newline %{ entity = INTERNAL_NL; } %d_ccallback
|
ws
|
[^\t `\\] @code
|
'\\' nonnewline @code
)* '`';
d_string = d_sq_str | d_dq_str | d_bt_str;
d_line := |*
spaces ${ entity = D_SPACE; } => d_ccallback;
d_comment;
d_string;
newline ${ entity = NEWLINE; } => d_ccallback;
^space ${ entity = D_ANY; } => d_ccallback;
*|;
# Entity machine
action d_ecallback {
callback(D_LANG, d_entities[entity], cint(ts), cint(te), userdata);
}
d_line_comment_entity = '//' (escaped_newline | nonnewline)*;
d_block_comment_entity = '/*' any* :>> '*/';
d_nested_comment_entity = '/+' >d_comment_nc_res (
'/+' @d_comment_nc_inc
|
'+/' @d_comment_nc_dec
|
any
)* :>> ('+/' when { nest_count == 0 });
d_comment_entity = d_line_comment_entity | d_block_comment_entity |
d_nested_comment_entity;
d_entity := |*
space+ ${ entity = D_SPACE; } => d_ecallback;
d_comment_entity ${ entity = D_COMMENT; } => d_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with D code.
*
* @param *buffer The string to parse.
* @param length The length of the string to parse.
* @param count Integer flag specifying whether or not to count lines. If yes,
* uses the Ragel machine optimized for counting. Otherwise uses the Ragel
* machine optimized for returning entity positions.
* @param *callback Callback function. If count is set, callback is called for
* every line of code, comment, or blank with 'lcode', 'lcomment', and
* 'lblank' respectively. Otherwise callback is called for each entity found.
*/
void parse_d(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
int nest_count = 0;
%% write init;
cs = (count) ? d_en_d_line : d_en_d_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(D_LANG) }
}
#endif
/*****************************************************************************/