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string_parser.h
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46 lines (39 loc) · 1.77 KB
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#ifndef STRINGS_H
#define STRINGS_H
#include <Python.h>
#include <pycore_ast.h>
#include "pegen.h"
#define EXPRLIST_N_CACHED 64
typedef struct {
/* Incrementally build an array of expr_ty, so be used in an
asdl_seq. Cache some small but reasonably sized number of
expr_ty's, and then after that start dynamically allocating,
doubling the number allocated each time. Note that the f-string
f'{0}a{1}' contains 3 expr_ty's: 2 FormattedValue's, and one
Constant for the literal 'a'. So you add expr_ty's about twice as
fast as you add expressions in an f-string. */
Py_ssize_t allocated; /* Number we've allocated. */
Py_ssize_t size; /* Number we've used. */
expr_ty *p; /* Pointer to the memory we're actually
using. Will point to 'data' until we
start dynamically allocating. */
expr_ty data[EXPRLIST_N_CACHED];
} ExprList;
/* The FstringParser is designed to add a mix of strings and
f-strings, and concat them together as needed. Ultimately, it
generates an expr_ty. */
typedef struct {
PyObject *last_str;
ExprList expr_list;
int fmode;
} FstringParser;
void _PyPegen_FstringParser_Init(FstringParser *);
int _PyPegen_parsestr(Parser *, int *, int *, PyObject **,
const char **, Py_ssize_t *, Token *);
int _PyPegen_FstringParser_ConcatFstring(Parser *, FstringParser *, const char **,
const char *, int, int, Token *, Token *,
Token *);
int _PyPegen_FstringParser_ConcatAndDel(FstringParser *, PyObject *);
expr_ty _PyPegen_FstringParser_Finish(Parser *, FstringParser *, Token *, Token *);
void _PyPegen_FstringParser_Dealloc(FstringParser *);
#endif