feat: declval

1 files changed, 9 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index c872c90..aeae982 100644
--- a/eval.c
+++ b/eval.c
@@ -121,6 +121,15 @@ static int evaluate_value(struct Machine* machine, const struct Node* node, int6
 
             *out = variable->value;
             return 0;
+        case VALUE_DECLVAL:
+            if (evaluate_type(machine, node->first, &type))
+                return 1;
+
+            if (type.kind != KIND_VALUE)
+                return complain(node, "declval of a type with no value in it, what did you expect");
+
+            *out = type.number;
+            return 0;
         case VALUE_CONDITIONAL:
             if (evaluate_condition(machine, node->first, &truth))
                 return 1;