Add `intrinsics.type_canonical_name`

base/intrinsics/intrinsics.odin

@@ -233,6 +233,9 @@ type_integer_to_signed   :: proc($T: typeid) -> type where type_is_integer(T), t
 
 type_has_shared_fields :: proc($U, $V: typeid) -> bool where type_is_struct(U), type_is_struct(V) ---
 
+// Returns the canonicalized name of the type, of which is used to produce the pseudo-unique 'typeid'
+type_canonical_name :: proc($T: typeid) -> string ---
+
 constant_utf16_cstring :: proc($literal: string) -> [^]u16 ---
 
 constant_log2 :: proc($v: $T) -> T where type_is_integer(T) ---

src/check_builtin.cpp

@@ -7134,6 +7134,22 @@ gb_internal bool check_builtin_procedure(CheckerContext *c, Operand *operand, As
 			break;
 		}
 
+	case BuiltinProc_type_canonical_name:
+		{
+			Operand op = {};
+			Type *type = check_type(c, ce->args[0]);
+			Type *bt = base_type(type);
+			if (bt == nullptr || bt == t_invalid) {
+				error(ce->args[0], "Expected a type for '%.*s'", LIT(builtin_name));
+				return false;
+			}
+
+			operand->mode = Addressing_Constant;
+			operand->type = t_untyped_string;
+			operand->value = type_to_canonical_string(permanent_allocator(), type);
+			break;
+		}
+
 	case BuiltinProc_procedure_of:
 		{
 			Ast *call_expr = unparen_expr(ce->args[0]);

src/checker_builtin_procs.hpp

@@ -339,6 +339,8 @@ BuiltinProc__type_simple_boolean_end,
 
 	BuiltinProc_type_has_shared_fields,
 
+	BuiltinProc_type_canonical_name,
+
 BuiltinProc__type_end,
 
 	BuiltinProc_procedure_of,
@@ -697,6 +699,7 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_COUNT] = {
 	{STR_LIT("type_map_cell_info"), 1, false, Expr_Expr, BuiltinProcPkg_intrinsics},
 
 	{STR_LIT("type_has_shared_fields"), 2, false, Expr_Expr, BuiltinProcPkg_intrinsics},
+	{STR_LIT("type_canonical_name"), 1, false, Expr_Expr, BuiltinProcPkg_intrinsics},
 
 	{STR_LIT(""), 0, false, Expr_Stmt, BuiltinProcPkg_intrinsics},