// scala.rl written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
/************************* Required for every parser *************************/
#ifndef OHCOUNT_SCALA_PARSER_H
#define OHCOUNT_SCALA_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *SCALA_LANG = LANG_SCALA;
// the languages entities
const char *scala_entities[] = {
"space", "comment", "string", "any",
};
// constants associated with the entities
enum {
SCALA_SPACE = 0, SCALA_COMMENT, SCALA_STRING, SCALA_ANY
};
/*****************************************************************************/
%%{
machine scala;
write data;
include common "common.rl";
# Line counting machine
action scala_ccallback {
switch(entity) {
case SCALA_SPACE:
ls
break;
case SCALA_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(SCALA_LANG)
break;
case NEWLINE:
std_newline(SCALA_LANG)
}
}
scala_line_comment = '//' @comment nonnewline*;
scala_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %scala_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
scala_comment = scala_line_comment | scala_block_comment;
scala_sq_str = '\'' @code ([^\r\n\f'\\] | '\\' nonnewline)* '\'';
scala_dq_str = '"' @code ([^\r\n\f"\\] | '\\' nonnewline)* '"';
scala_string = scala_sq_str | scala_dq_str;
scala_line := |*
spaces ${ entity = SCALA_SPACE; } => scala_ccallback;
scala_comment;
scala_string;
newline ${ entity = NEWLINE; } => scala_ccallback;
^space ${ entity = SCALA_ANY; } => scala_ccallback;
*|;
# Entity machine
action scala_ecallback {
callback(SCALA_LANG, scala_entities[entity], cint(ts), cint(te), userdata);
}
scala_line_comment_entity = '//' nonnewline*;
scala_block_comment_entity = '/*' any* :>> '*/';
scala_comment_entity = scala_line_comment_entity | scala_block_comment_entity;
scala_entity := |*
space+ ${ entity = SCALA_SPACE; } => scala_ecallback;
scala_comment_entity ${ entity = SCALA_COMMENT; } => scala_ecallback;
# TODO:
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with Scala 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_scala(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
%% write init;
cs = (count) ? scala_en_scala_line : scala_en_scala_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(SCALA_LANG) }
}
#endif
/*****************************************************************************/