-struct trace_t {
- struct trace_t *prev; /* previous stack frame */
- const char *file; /* source filename */
- int line; /* line number */
- const char *meth; /* method name */
+/* Stack frames.
+ * Are used to:
+ * - store local variables (REGS) of functions
+ * - store context for closure
+ * - provide information for stack dump
+ */
+struct stack_frame_t {
+ struct stack_frame_t *prev; /* previous stack frame */
+ const char *file; /* source filename (.nit) */
+ int line; /* line number (in the source) */
+ const char *meth; /* human function name (usually the method name) */
+ struct stack_frame_t *closure_ctx; /* closure context (for functions that have closure parameters) */
+ fun_t *closure_funs; /* closure functions (for functions that have closure parameters) */
+ int has_broke; /* has an escape occured? 0 if false, label_idx (>0) if true */
+ int REG_size; /* number of local variables */
+ val_t REG[1]; /* local variables (flexible array) */