py/compile: Combine break and continue compile functions.

py/compile.c

@@ -945,20 +945,21 @@ STATIC void compile_del_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
     apply_to_single_or_list(comp, pns->nodes[0], PN_exprlist, c_del_stmt);
 }
 
-STATIC void compile_break_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
-    if (comp->break_label == INVALID_LABEL) {
-        compile_syntax_error(comp, (mp_parse_node_t)pns, "'break' outside loop");
+STATIC void compile_break_cont_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
+    uint16_t label;
+    const char *error_msg;
+    if (MP_PARSE_NODE_STRUCT_KIND(pns) == PN_break_stmt) {
+        label = comp->break_label;
+        error_msg = "'break' outside loop";
+    } else {
+        label = comp->continue_label;
+        error_msg = "'continue' outside loop";
     }
-    assert(comp->cur_except_level >= comp->break_continue_except_level);
-    EMIT_ARG(unwind_jump, comp->break_label, comp->cur_except_level - comp->break_continue_except_level);
-}
-
-STATIC void compile_continue_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {
-    if (comp->continue_label == INVALID_LABEL) {
-        compile_syntax_error(comp, (mp_parse_node_t)pns, "'continue' outside loop");
+    if (label == INVALID_LABEL) {
+        compile_syntax_error(comp, (mp_parse_node_t)pns, error_msg);
     }
     assert(comp->cur_except_level >= comp->break_continue_except_level);
-    EMIT_ARG(unwind_jump, comp->continue_label, comp->cur_except_level - comp->break_continue_except_level);
+    EMIT_ARG(unwind_jump, label, comp->cur_except_level - comp->break_continue_except_level);
 }
 
 STATIC void compile_return_stmt(compiler_t *comp, mp_parse_node_struct_t *pns) {

py/grammar.h

@@ -122,8 +122,8 @@ DEF_RULE_NC(augassign, or(12), tok(DEL_PLUS_EQUAL), tok(DEL_MINUS_EQUAL), tok(DE
 DEF_RULE(del_stmt, c(del_stmt), and(2), tok(KW_DEL), rule(exprlist))
 DEF_RULE(pass_stmt, c(generic_all_nodes), and(1), tok(KW_PASS))
 DEF_RULE_NC(flow_stmt, or(5), rule(break_stmt), rule(continue_stmt), rule(return_stmt), rule(raise_stmt), rule(yield_stmt))
-DEF_RULE(break_stmt, c(break_stmt), and(1), tok(KW_BREAK))
-DEF_RULE(continue_stmt, c(continue_stmt), and(1), tok(KW_CONTINUE))
+DEF_RULE(break_stmt, c(break_cont_stmt), and(1), tok(KW_BREAK))
+DEF_RULE(continue_stmt, c(break_cont_stmt), and(1), tok(KW_CONTINUE))
 DEF_RULE(return_stmt, c(return_stmt), and(2), tok(KW_RETURN), opt_rule(testlist))
 DEF_RULE(yield_stmt, c(yield_stmt), and(1), rule(yield_expr))
 DEF_RULE(raise_stmt, c(raise_stmt), and(2), tok(KW_RAISE), opt_rule(raise_stmt_arg))