feat: specialize generic type and value parameters

source/diagnostics/diagnostics.hon

@@ -107,6 +107,10 @@ Code :: enum {
     catch_type_mismatch
     errdefer_outside_fallible
     cleanup_control_flow
+    comptime_argument_required
+    cannot_infer_generic
+    specialization_cycle
+    specialization_limit
 }
 
 Diagnostic :: struct {
@@ -235,5 +239,9 @@ messages :: $enummap.init(Code, []u8, {
     catch_type_mismatch = "catch handler must produce the success type or terminate",
     errdefer_outside_fallible = "errdefer requires an enclosing fallible function",
     cleanup_control_flow = "cleanup cannot escape with return, break, continue, or try",
+    comptime_argument_required = "generic argument must be a compile-time value",
+    cannot_infer_generic = "cannot infer consistent compile-time arguments from runtime arguments",
+    specialization_cycle = "compile-time specialization depends on its unfinished result",
+    specialization_limit = "compile-time specialization exceeds its recursion or instance limit",
 })