104 lines
4.6 KiB
C
104 lines
4.6 KiB
C
#include "../mpc.h"
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
mpc_parser_t* Ident = mpc_new("ident");
|
|
mpc_parser_t* Number = mpc_new("number");
|
|
mpc_parser_t* Character = mpc_new("character");
|
|
mpc_parser_t* String = mpc_new("string");
|
|
mpc_parser_t* Factor = mpc_new("factor");
|
|
mpc_parser_t* Term = mpc_new("term");
|
|
mpc_parser_t* Lexp = mpc_new("lexp");
|
|
mpc_parser_t* Stmt = mpc_new("stmt");
|
|
mpc_parser_t* Exp = mpc_new("exp");
|
|
mpc_parser_t* Typeident = mpc_new("typeident");
|
|
mpc_parser_t* Decls = mpc_new("decls");
|
|
mpc_parser_t* Args = mpc_new("args");
|
|
mpc_parser_t* Body = mpc_new("body");
|
|
mpc_parser_t* Procedure = mpc_new("procedure");
|
|
mpc_parser_t* Main = mpc_new("main");
|
|
mpc_parser_t* Includes = mpc_new("includes");
|
|
mpc_parser_t* Smallc = mpc_new("smallc");
|
|
|
|
mpc_err_t* err = mpca_lang(MPC_LANG_DEFAULT,
|
|
" \n\
|
|
ident : /[a-zA-Z_][a-zA-Z0-9_]*/ ; \n\
|
|
number : /[0-9]+/ ; \n\
|
|
character : /'.'/ ; \n\
|
|
string : /\"(\\\\.|[^\"])*\"/ ; \n\
|
|
\n\
|
|
factor : '(' <lexp> ')' \n\
|
|
| <number> \n\
|
|
| <character> \n\
|
|
| <string> \n\
|
|
| <ident> '(' <lexp>? (',' <lexp>)* ')' \n\
|
|
| <ident> ; \n\
|
|
\n\
|
|
term : <factor> (('*' | '/' | '%') <factor>)* ; \n\
|
|
lexp : <term> (('+' | '-') <term>)* ; \n\
|
|
\n\
|
|
stmt : '{' <stmt>* '}' \n\
|
|
| \"while\" '(' <exp> ')' <stmt> \n\
|
|
| \"if\" '(' <exp> ')' <stmt> \n\
|
|
| <ident> '=' <lexp> ';' \n\
|
|
| \"print\" '(' <lexp>? ')' ';' \n\
|
|
| \"return\" <lexp>? ';' \n\
|
|
| <ident> '(' <ident>? (',' <ident>)* ')' ';' ; \n\
|
|
\n\
|
|
exp : <lexp> '>' <lexp> \n\
|
|
| <lexp> '<' <lexp> \n\
|
|
| <lexp> \">=\" <lexp> \n\
|
|
| <lexp> \"<=\" <lexp> \n\
|
|
| <lexp> \"!=\" <lexp> \n\
|
|
| <lexp> \"==\" <lexp> ; \n\
|
|
\n\
|
|
typeident : (\"int\" | \"char\") <ident> ; \n\
|
|
decls : (<typeident> ';')* ; \n\
|
|
args : <typeident>? (',' <typeident>)* ; \n\
|
|
body : '{' <decls> <stmt>* '}' ; \n\
|
|
procedure : (\"int\" | \"char\") <ident> '(' <args> ')' <body> ; \n\
|
|
main : \"main\" '(' ')' <body> ; \n\
|
|
includes : (\"#include\" <string>)* ; \n\
|
|
smallc : /^/ <includes> <decls> <procedure>* <main> /$/ ; \n\
|
|
",
|
|
Ident, Number, Character, String, Factor, Term, Lexp, Stmt, Exp,
|
|
Typeident, Decls, Args, Body, Procedure, Main, Includes, Smallc);
|
|
|
|
if (err != NULL) {
|
|
mpc_err_print(err);
|
|
mpc_err_delete(err);
|
|
exit(1);
|
|
}
|
|
|
|
if (argc > 1) {
|
|
|
|
mpc_result_t r;
|
|
if (mpc_parse_contents(argv[1], Smallc, &r)) {
|
|
mpc_ast_print(r.output);
|
|
mpc_ast_delete(r.output);
|
|
} else {
|
|
mpc_err_print(r.error);
|
|
mpc_err_delete(r.error);
|
|
}
|
|
|
|
} else {
|
|
|
|
mpc_result_t r;
|
|
if (mpc_parse_pipe("<stdin>", stdin, Smallc, &r)) {
|
|
mpc_ast_print(r.output);
|
|
mpc_ast_delete(r.output);
|
|
} else {
|
|
mpc_err_print(r.error);
|
|
mpc_err_delete(r.error);
|
|
}
|
|
|
|
}
|
|
|
|
mpc_cleanup(17, Ident, Number, Character, String, Factor, Term, Lexp, Stmt, Exp,
|
|
Typeident, Decls, Args, Body, Procedure, Main, Includes, Smallc);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|