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bpo-41746: Add type information to asdl_seq objects (GH-22223)

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* Add new capability to the PEG parser to type variable assignments. For instance:
```
       | a[asdl_stmt_seq*]=';'.small_stmt+ [';'] NEWLINE { a }
```

* Add new sequence types from the asdl definition (automatically generated)
* Make `asdl_seq` type a generic aliasing pointer type.
* Create a new `asdl_generic_seq` for the generic case using `void*`.
* The old `asdl_seq_GET`/`ast_seq_SET` macros now are typed.
* New `asdl_seq_GET_UNTYPED`/`ast_seq_SET_UNTYPED` macros for dealing with generic sequences.
* Changes all possible `asdl_seq` types to use specific versions everywhere.
This commit is contained in:
Pablo Galindo 2020-09-16 19:42:00 +01:00 • committed by GitHub
parent 5c1b46d897
commit a5634c4067
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GPG key ID: 4AEE18F83AFDEB23
22 changed files with 1338 additions and 1086 deletions
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25
Python/ast.c
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@ -14,9 +14,9 @@
#define MAXLEVEL 200 /* Max parentheses level */
static int validate_stmts(asdl_seq *);
static int validate_exprs(asdl_seq *, expr_context_ty, int);
static int validate_nonempty_seq(asdl_seq *, const char *, const char *);
static int validate_stmts(asdl_stmt_seq *);
static int validate_exprs(asdl_expr_seq*, expr_context_ty, int);
static int _validate_nonempty_seq(asdl_seq *, const char *, const char *);
static int validate_stmt(stmt_ty);
static int validate_expr(expr_ty, expr_context_ty);
@ -40,7 +40,7 @@ validate_name(PyObject *name)
}
static int
validate_comprehension(asdl_seq *gens)
validate_comprehension(asdl_comprehension_seq *gens)
{
Py_ssize_t i;
if (!asdl_seq_LEN(gens)) {
@ -58,7 +58,7 @@ validate_comprehension(asdl_seq *gens)
}
static int
validate_keywords(asdl_seq *keywords)
validate_keywords(asdl_keyword_seq *keywords)
{
Py_ssize_t i;
for (i = 0; i < asdl_seq_LEN(keywords); i++)
@ -68,7 +68,7 @@ validate_keywords(asdl_seq *keywords)
}
static int
validate_args(asdl_seq *args)
validate_args(asdl_arg_seq *args)
{
Py_ssize_t i;
for (i = 0; i < asdl_seq_LEN(args); i++) {
@ -324,23 +324,24 @@ validate_expr(expr_ty exp, expr_context_ty ctx)
}
static int
validate_nonempty_seq(asdl_seq *seq, const char *what, const char *owner)
_validate_nonempty_seq(asdl_seq *seq, const char *what, const char *owner)
{
if (asdl_seq_LEN(seq))
return 1;
PyErr_Format(PyExc_ValueError, "empty %s on %s", what, owner);
return 0;
}
#define validate_nonempty_seq(seq, what, owner) _validate_nonempty_seq((asdl_seq*)seq, what, owner)
static int
validate_assignlist(asdl_seq *targets, expr_context_ty ctx)
validate_assignlist(asdl_expr_seq *targets, expr_context_ty ctx)
{
return validate_nonempty_seq(targets, "targets", ctx == Del ? "Delete" : "Assign") &&
validate_exprs(targets, ctx, 0);
}
static int
validate_body(asdl_seq *body, const char *owner)
validate_body(asdl_stmt_seq *body, const char *owner)
{
return validate_nonempty_seq(body, "body", owner) && validate_stmts(body);
}
@ -488,7 +489,7 @@ validate_stmt(stmt_ty stmt)
}
static int
validate_stmts(asdl_seq *seq)
validate_stmts(asdl_stmt_seq *seq)
{
Py_ssize_t i;
for (i = 0; i < asdl_seq_LEN(seq); i++) {
@ -507,7 +508,7 @@ validate_stmts(asdl_seq *seq)
}
static int
validate_exprs(asdl_seq *exprs, expr_context_ty ctx, int null_ok)
validate_exprs(asdl_expr_seq *exprs, expr_context_ty ctx, int null_ok)
{
Py_ssize_t i;
for (i = 0; i < asdl_seq_LEN(exprs); i++) {
@ -550,7 +551,7 @@ PyAST_Validate(mod_ty mod)
}
PyObject *
_PyAST_GetDocString(asdl_seq *body)
_PyAST_GetDocString(asdl_stmt_seq *body)
{
if (!asdl_seq_LEN(body)) {
return NULL;