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main.c
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main.c
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#include "mpc.h"
#include "lval.c"
#include "eval.c"
#ifdef _WIN32
static char buffer[2048];
char* readline(char* prompt) {
fputs("edward> ", stdout);
fgets(buffer, 2048, stdin);
char* cpy = malloc(strlen(buffer)+1);
strcpy(cpy, buffer);
cpy[strlen(cpy)-1] = '\0';
return cpy;
}
void add_history(char* unused) {}
#else
#include <editline/readline.h>
#endif
int main(int argc, char** argv) {
mpc_parser_t* Number = mpc_new("number");
mpc_parser_t* Operator = mpc_new("operator");
mpc_parse_t* Sexpr = mpc_new("sexpr");
mpc_parse_t* Qexpr = mpc_new("qexpr");
mpc_parser_t* Expr = mpc_new("expr");
mpc_parser_t* Edward = mpc_new("edward");
mpca_lang(MPC_LANG_DEFAULT,
" \
number : /-?[0-9]+/ ; \
operator : '+' | '-' | '*' | '/' | '%'; \
sexpr : '(' <expr> ')'; \
qexpr : '{' <expr> '}'; \
expr : <number> | '(' <operator> <expr>+ ')' ; \
edward : /^/ <operator> <expr>+ /$/ ; \
",
Number, Operator, Sexpr, Qexpr, Expr, Edward);
puts("Edward Version 0.0.0.0.4");
puts("Press Ctrl+c to Exit\n");
while (1) {
char* input = readline("edward> ");
add_history(input);
mpc_result_t r;
if (mpc_parse("<stdin>", input, Edward, &r)) {
lval result = eval(r.output);
lval_println(result);
mpc_ast_delete(r.output);
} else {
mpc_err_print(r.error);
mpc_err_delete(r.error);
}
free(input);
}
mpc_cleanup(6, Number, Operator, Sexpr, Qexpr, Expr, Edward);
return 0;
}