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Added basic Quoted expression functionality (Create, Read, Add, Delete)

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Brandon Rozek 2018-06-06 21:25:40 -04:00
parent 47fbb7ab68
commit c5e6323d04
1 changed files with 33 additions and 15 deletions
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46
prompt.c
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@ -50,7 +50,7 @@ typedef struct lval {
} lval;
// Possible lispy value types
enum { LVAL_ERR, LVAL_LONG, LVAL_DOUBLE, LVAL_SYM, LVAL_SEXPR };
enum { LVAL_ERR, LVAL_LONG, LVAL_DOUBLE, LVAL_SYM, LVAL_SEXPR, LVAL_QEXPR };
double max(double x, double y);
double min(double x, double y);
@ -86,22 +86,23 @@ int main (int argc, char** argv) {
mpc_parser_t* Double = mpc_new("double");
mpc_parser_t* Symbol = mpc_new("symbol");
mpc_parser_t* Sexpr = mpc_new("sexpr");
mpc_parser_t* Qexpr = mpc_new("qexpr");
mpc_parser_t* Expr = mpc_new("expr");
mpc_parser_t* Lispy = mpc_new("lispy");
// Define them with the following language
mpca_lang(MPCA_LANG_DEFAULT,
"\
number : /[0-9]+/; \
long : /-?[0-9]+/; \
double : <long> '.' <number>; \
symbol : '+' | '-' | '*' | '/' | '%' \
| '^' | \"min\" | \"max\"; \
sexpr : '(' <expr>* ')'; \
expr : (<double> | <long>) | <symbol> | <sexpr>; \
lispy : /^/ <expr>* /$/; \
", Number, Long, Double, Symbol, Sexpr, Expr, Lispy);
"number : /[0-9]+/; "
"long : /-?[0-9]+/; "
"double : <long> '.' <number>; "
"symbol : '+' | '-' | '*' | '/' | '%' \
| '^' | \"min\" | \"max\"; "
"sexpr : '(' <expr>* ')'; "
"qexpr : '{' <expr>* '}'; "
"expr : (<double> | <long>) | <symbol> | <sexpr> | <qexpr>; "
"lispy : /^/ <expr>* /$/; "
, Number, Long, Double, Symbol, Sexpr, Qexpr, Expr, Lispy);
// Print Version and Exit Information
@ -124,7 +125,7 @@ int main (int argc, char** argv) {
lval* result = lval_eval(lval_read(r.output));
lval_println(result);
lval_del(result);
mpc_ast_print(r.output);
// mpc_ast_print(r.output);
mpc_ast_delete(r.output);
} else {
// Otherwise print the error
@ -136,7 +137,7 @@ int main (int argc, char** argv) {
free(input);
}
mpc_cleanup(7, Number, Long, Double, Symbol, Sexpr, Expr, Lispy);
mpc_cleanup(8, Number, Long, Double, Symbol, Sexpr, Qexpr, Expr, Lispy);
return 0;
}
@ -193,6 +194,13 @@ lval* lval_sexpr(void) {
return v;
}
lval* lval_qexpr(void) {
lval* v = malloc(sizeof(lval));
v->type = LVAL_QEXPR;
v->count = 0;
v->cell = NULL;
return v;
}
void lval_del(lval* v) {
switch (v->type) {
case LVAL_LONG: break;
@ -202,7 +210,8 @@ void lval_del(lval* v) {
case LVAL_ERR: free(v->err); break;
case LVAL_SYM: free(v->sym); break;
// Delete all elements inside SEXPR
// Delete all elements inside SEXPR or QEXPR
case LVAL_QEXPR:
case LVAL_SEXPR:
for (int i = 0; i < v->count; i++) {
lval_del(v->cell[i]);
@ -210,6 +219,7 @@ void lval_del(lval* v) {
// Also free the memory allocated to contain the pointers
free(v->cell);
break;
}
// // Free the memory allocated for the lval struct itself
@ -254,10 +264,16 @@ lval* lval_read(mpc_ast_t* t) {
x = lval_sexpr();
}
if (strstr(t->tag, "qexpr")) {
x = lval_qexpr();
}
// Fill the list with any valid expression contained
for (int i = 0; i < t->children_num; i++) {
if (strcmp(t->children[i]->contents, "(") == 0) { continue; }
if (strcmp(t->children[i]->contents, ")") == 0) { continue; }
if (strcmp(t->children[i]->contents, "{") == 0) { continue; }
if (strcmp(t->children[i]->contents, "}") == 0) { continue; }
if (strcmp(t->children[i]->tag, "regex") == 0) { continue; }
x = lval_add(x, lval_read(t->children[i]));
}
@ -298,6 +314,8 @@ void flval_print(FILE* stream, lval* v) {
case LVAL_SYM: fprintf(stream, "%s", v->sym); break;
case LVAL_SEXPR: flval_expr_print(stream, v, '(', ')'); break;
case LVAL_QEXPR: flval_expr_print(stream, v, '{', '}'); break;
}
}