gh-121404: compiler_visit_* --> codegen_visit_* (#123382)

Python/compile.c

@@ -314,9 +314,9 @@ static int compiler_warn(struct compiler *, location loc, const char *, ...);
 static int compiler_nameop(struct compiler *, location, identifier, expr_context_ty);
 
 static PyCodeObject *compiler_mod(struct compiler *, mod_ty);
-static int compiler_visit_stmt(struct compiler *, stmt_ty);
+static int codegen_visit_stmt(struct compiler *, stmt_ty);
-static int compiler_visit_keyword(struct compiler *, keyword_ty);
+static int codegen_visit_keyword(struct compiler *, keyword_ty);
-static int compiler_visit_expr(struct compiler *, expr_ty);
+static int codegen_visit_expr(struct compiler *, expr_ty);
 static int codegen_augassign(struct compiler *, stmt_ty);
 static int codegen_annassign(struct compiler *, stmt_ty);
 static int codegen_subscript(struct compiler *, expr_ty);
@@ -1037,17 +1037,17 @@ codegen_addop_j(instr_sequence *seq, location loc,
 */
 
 #define VISIT(C, TYPE, V) \
-    RETURN_IF_ERROR(compiler_visit_ ## TYPE((C), (V)));
+    RETURN_IF_ERROR(codegen_visit_ ## TYPE((C), (V)));
 
 #define VISIT_IN_SCOPE(C, TYPE, V) \
-    RETURN_IF_ERROR_IN_SCOPE((C), compiler_visit_ ## TYPE((C), (V)))
+    RETURN_IF_ERROR_IN_SCOPE((C), codegen_visit_ ## TYPE((C), (V)))
 
 #define VISIT_SEQ(C, TYPE, SEQ) { \
     int _i; \
     asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
     for (_i = 0; _i < asdl_seq_LEN(seq); _i++) { \
         TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, _i); \
-        RETURN_IF_ERROR(compiler_visit_ ## TYPE((C), elt)); \
+        RETURN_IF_ERROR(codegen_visit_ ## TYPE((C), elt)); \
     } \
 }
 
@@ -1056,7 +1056,7 @@ codegen_addop_j(instr_sequence *seq, location loc,
     asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
     for (_i = 0; _i < asdl_seq_LEN(seq); _i++) { \
         TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, _i); \
-        if (compiler_visit_ ## TYPE((C), elt) < 0) { \
+        if (codegen_visit_ ## TYPE((C), elt) < 0) { \
             compiler_exit_scope(C); \
             return ERROR; \
         } \
@@ -1837,22 +1837,18 @@ codegen_kwonlydefaults(struct compiler *c, location loc,
 
        Return -1 on error, 0 if no dict pushed, 1 if a dict is pushed.
        */
-    int i;
-    PyObject *keys = NULL;
     int default_count = 0;
-    for (i = 0; i < asdl_seq_LEN(kwonlyargs); i++) {
+    for (int i = 0; i < asdl_seq_LEN(kwonlyargs); i++) {
         arg_ty arg = asdl_seq_GET(kwonlyargs, i);
         expr_ty default_ = asdl_seq_GET(kw_defaults, i);
         if (default_) {
             default_count++;
             PyObject *mangled = compiler_maybe_mangle(c, arg->arg);
             if (!mangled) {
-                goto error;
+                return ERROR;
             }
             ADDOP_LOAD_CONST_NEW(c, loc, mangled);
-            if (compiler_visit_expr(c, default_) < 0) {
+            VISIT(c, expr, default_);
-                goto error;
-            }
         }
     }
     if (default_count) {
@@ -1862,14 +1858,10 @@ codegen_kwonlydefaults(struct compiler *c, location loc,
     else {
         return 0;
     }
-
-error:
-    Py_XDECREF(keys);
-    return ERROR;
 }
 
 static int
-compiler_visit_annexpr(struct compiler *c, expr_ty annotation)
+codegen_visit_annexpr(struct compiler *c, expr_ty annotation)
 {
     location loc = LOC(annotation);
     ADDOP_LOAD_CONST_NEW(c, loc, _PyAST_ExprAsUnicode(annotation));
@@ -3854,7 +3846,7 @@ codegen_stmt_expr(struct compiler *c, location loc, expr_ty value)
 }
 
 static int
-compiler_visit_stmt(struct compiler *c, stmt_ty s)
+codegen_visit_stmt(struct compiler *c, stmt_ty s)
 {
 
     switch (s->kind) {
@@ -5807,7 +5799,7 @@ codegen_dictcomp(struct compiler *c, expr_ty e)
 
 
 static int
-compiler_visit_keyword(struct compiler *c, keyword_ty k)
+codegen_visit_keyword(struct compiler *c, keyword_ty k)
 {
     VISIT(c, expr, k->value);
     return SUCCESS;
@@ -6035,7 +6027,7 @@ codegen_with(struct compiler *c, stmt_ty s, int pos)
 }
 
 static int
-compiler_visit_expr(struct compiler *c, expr_ty e)
+codegen_visit_expr(struct compiler *c, expr_ty e)
 {
     location loc = LOC(e);
     switch (e->kind) {
@@ -6406,7 +6398,7 @@ codegen_annassign(struct compiler *c, stmt_ty s)
     return SUCCESS;
 }
 
-/* Raises a SyntaxError and returns 0.
+/* Raises a SyntaxError and returns ERROR.
    If something goes wrong, a different exception may be raised.
 */
 
@@ -6877,6 +6869,36 @@ codegen_pattern_class(struct compiler *c, pattern_ty p, pattern_context *pc)
     return SUCCESS;
 }
 
+static int
+codegen_pattern_mapping_key(struct compiler *c, PyObject *seen, pattern_ty p, Py_ssize_t i)
+{
+    asdl_expr_seq *keys = p->v.MatchMapping.keys;
+    asdl_pattern_seq *patterns = p->v.MatchMapping.patterns;
+    expr_ty key = asdl_seq_GET(keys, i);
+    if (key == NULL) {
+        const char *e = "can't use NULL keys in MatchMapping "
+                        "(set 'rest' parameter instead)";
+        location loc = LOC((pattern_ty) asdl_seq_GET(patterns, i));
+        return compiler_error(c, loc, e);
+    }
+
+    if (key->kind == Constant_kind) {
+        int in_seen = PySet_Contains(seen, key->v.Constant.value);
+        RETURN_IF_ERROR(in_seen);
+        if (in_seen) {
+            const char *e = "mapping pattern checks duplicate key (%R)";
+            return compiler_error(c, LOC(p), e, key->v.Constant.value);
+        }
+        RETURN_IF_ERROR(PySet_Add(seen, key->v.Constant.value));
+    }
+    else if (key->kind != Attribute_kind) {
+        const char *e = "mapping pattern keys may only match literals and attribute lookups";
+        return compiler_error(c, LOC(p), e);
+    }
+    VISIT(c, expr, key);
+    return SUCCESS;
+}
+
 static int
 codegen_pattern_mapping(struct compiler *c, pattern_ty p,
                         pattern_context *pc)
@@ -6923,45 +6945,15 @@ codegen_pattern_mapping(struct compiler *c, pattern_ty p,
     if (seen == NULL) {
         return ERROR;
     }
-
-    // NOTE: goto error on failure in the loop below to avoid leaking `seen`
     for (Py_ssize_t i = 0; i < size; i++) {
-        expr_ty key = asdl_seq_GET(keys, i);
+        if (codegen_pattern_mapping_key(c, seen, p, i) < 0) {
-        if (key == NULL) {
+            Py_DECREF(seen);
-            const char *e = "can't use NULL keys in MatchMapping "
+            return ERROR;
-                            "(set 'rest' parameter instead)";
-            location loc = LOC((pattern_ty) asdl_seq_GET(patterns, i));
-            compiler_error(c, loc, e);
-            goto error;
-        }
-
-        if (key->kind == Constant_kind) {
-            int in_seen = PySet_Contains(seen, key->v.Constant.value);
-            if (in_seen < 0) {
-                goto error;
-            }
-            if (in_seen) {
-                const char *e = "mapping pattern checks duplicate key (%R)";
-                compiler_error(c, LOC(p), e, key->v.Constant.value);
-                goto error;
-            }
-            if (PySet_Add(seen, key->v.Constant.value)) {
-                goto error;
-            }
-        }
-
-        else if (key->kind != Attribute_kind) {
-            const char *e = "mapping pattern keys may only match literals and attribute lookups";
-            compiler_error(c, LOC(p), e);
-            goto error;
-        }
-        if (compiler_visit_expr(c, key) < 0) {
-            goto error;
         }
     }
+    Py_DECREF(seen);
 
     // all keys have been checked; there are no duplicates
-    Py_DECREF(seen);
 
     ADDOP_I(c, LOC(p), BUILD_TUPLE, size);
     ADDOP(c, LOC(p), MATCH_KEYS);
@@ -7006,10 +6998,6 @@ codegen_pattern_mapping(struct compiler *c, pattern_ty p,
         ADDOP(c, LOC(p), POP_TOP);  // Subject.
     }
     return SUCCESS;
-
-error:
-    Py_DECREF(seen);
-    return ERROR;
 }
 
 static int