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