janware/jw-python
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grammar.py and friends: Improve line numbers and headers

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Line numbers of parsed input are now automatically maintained. More
needed data structures are now automatically created in the API header
file.

Signed-off-by: Jan Lindemann <jan@janware.com>
This commit is contained in:
Jan Lindemann 2017-11-03 12:54:19 +01:00
commit 3cba245b77
5 changed files with 76 additions and 71 deletions
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1
test/grammar/generate.conf
View file

@ -2,6 +2,7 @@
[white_space[
type = token
lex_extra_action = "if memchr(yytext, '\n', yyleng) context->line++;"
regex = "[ \n\t\r]+"
]

33
test/grammar/include/defs.h
View file

@ -1,33 +0,0 @@
#ifndef _JW_PYTHON_GRAMMARTEST_PARSER_DEFS_H
#define _JW_PYTHON_GRAMMARTEST_PARSER_DEFS_H
#define YY_NO_INPUT
#define YY_NO_UNPUT
// #define YY_NO_UNISTD_H
struct context {
int line;
int column;
};
union YYSTYPE;
#ifdef __cplusplus
extern "C" {
#endif
/* defined in grammartest-parser.l */
struct vp_scanner;
struct vp_scanner *grammartest_default_init_scanner(const char *str);
void *grammartest_default_scanner_get_data(const struct vp_scanner *scanner);
void grammartest_default_cleanup_scanner(struct vp_scanner *scanner);
void FB_SYM(error)(struct context *context, void *scanner, const char *s);
#ifdef __cplusplus
} // extern "C"
#endif
#define YY_DECL int FB_SYM(lex)(YYSTYPE *yylval_param, struct context *context, void *yyscanner)
#endif /* #ifndef _JW_PYTHON_GRAMMARTEST_PARSER_DEFS_H */

26
test/grammar/main.cpp
View file

@ -1,19 +1,10 @@
#include <string>
#include <stdio.h>
#include <misc.h>
#include <slog.h>
#include <YMisc.h>
// TODO: this should be included from grammartest.tab.h automatically
#include "include/grammartest.h"
#include "include/defs.h"
#include "include/grammartest.tab.h"
extern int FB_SYM(debug);
using namespace std;
int main(int argc, const char *argv[])
@ -30,20 +21,9 @@ int main(int argc, const char *argv[])
return 1;
}
// TODO: Initialize this in a generated function
struct context context = {
line: 1,
column: 0
};
FB_SYM(debug) = 1;
struct vp_scanner *scanner = FB_SYM(init_scanner)(content.c_str());
int status = FB_SYM(parse)(&context, FB_SYM(scanner_get_data)(scanner));
FB_SYM(cleanup_scanner)(scanner);
if (status) {
slog(PRI_ERR, "failed to parse [%s] (%s)", path, err());
return -1;
if (FB_SYM(create_ast)(content.c_str())<0) {
slog(PRI_ERR, "failed to create AST from [%s] (%s)", path, err());
return 1;
}
return 0;