add (if cond if-true if-false) builtin

1 files changed, 6 insertions, 0 deletions

diff --git a/val.c b/val.c
index 6f1dd9e..19f96a0 100644
--- a/val.c
+++ b/val.c
@@ -75,6 +75,12 @@ void println_val(Val v) {
 	putchar('\n');
 }
 
+bool is_truthy(Val v) {
+	if (IS_NIL(v) || ( IS_BOOL(v) && AS_BOOL(v) == false)) 
+		return false;
+	return true;
+}
+
 
 const char *typename_str(Val v) {
 	switch(v.ty) {