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96ec934e75
This commit simplifies async/await tokenization in tokenizer.c, tokenize.py & lib2to3/tokenize.py. Previous solution was to keep a stack of async-def & def blocks, whereas the new approach is just to remember position of the outermost async-def block. This change won't bring any parsing performance improvements, but it makes the code much easier to read and validate.
90 lines
3.8 KiB
C
90 lines
3.8 KiB
C
#ifndef Py_TOKENIZER_H
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#define Py_TOKENIZER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "object.h"
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/* Tokenizer interface */
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#include "token.h" /* For token types */
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#define MAXINDENT 100 /* Max indentation level */
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enum decoding_state {
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STATE_INIT,
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STATE_RAW,
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STATE_NORMAL /* have a codec associated with input */
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};
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/* Tokenizer state */
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struct tok_state {
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/* Input state; buf <= cur <= inp <= end */
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/* NB an entire line is held in the buffer */
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char *buf; /* Input buffer, or NULL; malloc'ed if fp != NULL */
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char *cur; /* Next character in buffer */
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char *inp; /* End of data in buffer */
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char *end; /* End of input buffer if buf != NULL */
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char *start; /* Start of current token if not NULL */
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int done; /* E_OK normally, E_EOF at EOF, otherwise error code */
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/* NB If done != E_OK, cur must be == inp!!! */
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FILE *fp; /* Rest of input; NULL if tokenizing a string */
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int tabsize; /* Tab spacing */
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int indent; /* Current indentation index */
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int indstack[MAXINDENT]; /* Stack of indents */
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int atbol; /* Nonzero if at begin of new line */
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int pendin; /* Pending indents (if > 0) or dedents (if < 0) */
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const char *prompt, *nextprompt; /* For interactive prompting */
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int lineno; /* Current line number */
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int level; /* () [] {} Parentheses nesting level */
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/* Used to allow free continuations inside them */
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/* Stuff for checking on different tab sizes */
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#ifndef PGEN
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/* pgen doesn't have access to Python codecs, it cannot decode the input
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filename. The bytes filename might be kept, but it is only used by
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indenterror() and it is not really needed: pgen only compiles one file
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(Grammar/Grammar). */
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PyObject *filename;
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#endif
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int altwarning; /* Issue warning if alternate tabs don't match */
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int alterror; /* Issue error if alternate tabs don't match */
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int alttabsize; /* Alternate tab spacing */
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int altindstack[MAXINDENT]; /* Stack of alternate indents */
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/* Stuff for PEP 0263 */
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enum decoding_state decoding_state;
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int decoding_erred; /* whether erred in decoding */
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int read_coding_spec; /* whether 'coding:...' has been read */
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char *encoding; /* Source encoding. */
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int cont_line; /* whether we are in a continuation line. */
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const char* line_start; /* pointer to start of current line */
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#ifndef PGEN
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PyObject *decoding_readline; /* open(...).readline */
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PyObject *decoding_buffer;
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#endif
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const char* enc; /* Encoding for the current str. */
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const char* str;
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const char* input; /* Tokenizer's newline translated copy of the string. */
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/* async/await related fields; can be removed in 3.7 when async and await
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become normal keywords. */
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int async_def; /* =1 if tokens are inside an 'async def' body. */
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int async_def_indent; /* Indentation level of the outermost 'async def'. */
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int async_def_nl; /* =1 if the outermost 'async def' had at least one
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NEWLINE token after it. */
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};
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extern struct tok_state *PyTokenizer_FromString(const char *, int);
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extern struct tok_state *PyTokenizer_FromUTF8(const char *, int);
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extern struct tok_state *PyTokenizer_FromFile(FILE *, const char*,
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const char *, const char *);
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extern void PyTokenizer_Free(struct tok_state *);
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extern int PyTokenizer_Get(struct tok_state *, char **, char **);
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extern char * PyTokenizer_RestoreEncoding(struct tok_state* tok,
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int len, int *offset);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_TOKENIZER_H */
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