Part of the Targum Compiler Frontend Suite, the Targum Parser is an string-configured, PEG interpreted parser.
- Using a config file, define your language grammar with powerful PEG features as quickly as needed!
- Produces a Parse Tree (Concrete Syntax Tree) that can be trimmed as needed into an Abstract Syntax Tree.
- - allow for left-associativity without uncontrollable left recursion.
#include "targum_parser.h"
static bool startup_lexer(void *userdata, const char filename[]) {
return my_lexer_init(userdata, filename);
}
static bool shutdown_lexer(void *userdata, const char filename[]) {
my_lexer_free(userdata, filename);
return true;
}
static uint32_t lexer_token(void *userdata, size_t lookahead, size_t *line, size_t *col) {
return my_lexer_get_token(userdata);
}
static const char *lexer_cstr(void *userdata, size_t lookahead, size_t *line, size_t *col) {
return my_lexer_get_lexeme(userdata);
}
static void lexer_consume(void *userdata, size_t lookahead, bool consumed) {
if( consumed ) {
advance_my_lexer(userdata);
}
}
int main(const int argc, char *argv[static 1])
{
struct MyLexer lexer = {0};
struct TargumParser parser = targum_parser_make(startup_lexer, shutdown_lexer, lexer_token, lexer_cstr, lexer_consume, &lexer, "example.txt", NULL);
if( !targum_parser_init(&parser) ) {
puts("failed to initialize targum parser.");
return 1;
} else if( !targum_parser_load_cfg_file(&parser, "./grammar.cfg") ) {
puts("failed to load grammar config.");
return 1;
}
targum_parser_define_token(&parser, "integer", MyLexerIntVal);
targum_parser_define_token(&parser, "float", MyLexerFltVal);
targum_parser_define_token(&parser, "string", MyLexerStrVal);
targum_parser_define_token(&parser, "char", MyLexerCharVal);
targum_parser_define_token(&parser, "identifier", MyLexerIdentVal);
struct HarbolTree *cst = targum_parser_run(&parser);
struct MyAST *ast = generate_ast_from_cst(cst);
targum_parser_free_cst(&cst);
...; ast = NULL;
targum_parser_clear(&parser, true);
}To submit a patch, first file an issue and/or present a pull request.
If you need help or have any question, make an issue on the github repository. Simply drop a message or your question and you'll be reached in no time!
C99 compliant compiler and libc implementation with stdlib.h, stdio.h, and stddef.h.
To build the library, simply run make which will make the static library version of libtargum_lexer.
To clean up the .o files, run make clean.
To build a debug version of the library, run make debug.
For testing code changes or additions, simply run make test with test_driver.c in the directory which will build an executable called test_driver which relies on Targum Lexer as the counter-part to Targum Parser.
- Kevin Yonan - Lead Developer of the Targum Compiler Frontend Suite.
This project is licensed under Apache License.