// boo.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net
/************************* Required for every parser *************************/
#ifndef OHCOUNT_BOO_PARSER_H
#define OHCOUNT_BOO_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *BOO_LANG = LANG_BOO;
// the languages entities
const char *boo_entities[] = {
"space", "comment", "string", "any"
};
// constants associated with the entities
enum {
BOO_SPACE = 0, BOO_COMMENT, BOO_STRING, BOO_ANY
};
/*****************************************************************************/
%%{
machine boo;
write data;
include common "common.rl";
# Line counting machine
action boo_ccallback {
switch(entity) {
case BOO_SPACE:
ls
break;
case BOO_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(BOO_LANG)
break;
case NEWLINE:
std_newline(BOO_LANG)
}
}
action boo_comment_nc_res { nest_count = 0; }
action boo_comment_nc_inc { nest_count++; }
action boo_comment_nc_dec { nest_count--; }
boo_line_comment = ('#' | '//') @comment nonnewline*;
boo_block_comment =
'/*' >boo_comment_nc_res @comment (
newline %{ entity = INTERNAL_NL; } %boo_ccallback
|
ws
|
'/*' @boo_comment_nc_inc @comment
|
'*/' @boo_comment_nc_dec @comment
|
^space @comment
)* :>> ('*/' when { nest_count == 0 }) @comment;
boo_doc_comment =
'"""' @comment (
newline %{ entity = INTERNAL_NL; } %boo_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '"""' @comment;
boo_comment = boo_line_comment | boo_block_comment | boo_doc_comment;
boo_char = '\'' ([^\r\n\f'\\] | '\\' nonnewline) '\'';
boo_dq_str =
'"' ([^"] | '"' [^"] @{ fhold; }) @{ fhold; } # make sure it's not """
([^\r\n\f"\\] | '\\' nonnewline)* '"';
boo_regex = '/' [^*/] @{ fhold; } ([^\r\n\f/\\] | '\\' nonnewline)* '/';
boo_string = (boo_char | boo_dq_str | boo_regex) @code;
boo_line := |*
spaces ${ entity = BOO_SPACE; } => boo_ccallback;
boo_comment;
boo_string;
newline ${ entity = NEWLINE; } => boo_ccallback;
^space ${ entity = BOO_ANY; } => boo_ccallback;
*|;
# Entity machine
action boo_ecallback {
callback(BOO_LANG, boo_entities[entity], cint(ts), cint(te), userdata);
}
boo_line_comment_entity = ('#' | '//') nonnewline*;
boo_block_comment_entity = '/*' >boo_comment_nc_res (
'/*' @boo_comment_nc_inc
|
'*/' @boo_comment_nc_dec
|
any
)* :>> ('*/' when { nest_count == 0 });
boo_comment_entity = boo_line_comment_entity | boo_block_comment_entity;
boo_entity := |*
space+ ${ entity = BOO_SPACE; } => boo_ecallback;
boo_comment_entity ${ entity = BOO_COMMENT; } => boo_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Boo 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_boo(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) ? boo_en_boo_line : boo_en_boo_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(BOO_LANG) }
}
#endif
/*****************************************************************************/