晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。   林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。   见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝)   既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。   南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。 sh-3ll

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#ifndef Py_INTERNAL_COMPILE_H
#define Py_INTERNAL_COMPILE_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

struct _arena;   // Type defined in pycore_pyarena.h
struct _mod;     // Type defined in pycore_ast.h

// Export the symbol for test_peg_generator (built as a library)
PyAPI_FUNC(PyCodeObject*) _PyAST_Compile(
    struct _mod *mod,
    PyObject *filename,
    PyCompilerFlags *flags,
    int optimize,
    struct _arena *arena);

static const _PyCompilerSrcLocation NO_LOCATION = {-1, -1, -1, -1};

typedef struct {
    int optimize;
    int ff_features;

    int recursion_depth;            /* current recursion depth */
    int recursion_limit;            /* recursion limit */
} _PyASTOptimizeState;

extern int _PyAST_Optimize(
    struct _mod *,
    struct _arena *arena,
    _PyASTOptimizeState *state);

typedef struct {
    int h_offset;
    int h_startdepth;
    int h_preserve_lasti;
} _PyCompile_ExceptHandlerInfo;

typedef struct {
    int i_opcode;
    int i_oparg;
    _PyCompilerSrcLocation i_loc;
    _PyCompile_ExceptHandlerInfo i_except_handler_info;
} _PyCompile_Instruction;

typedef struct {
    _PyCompile_Instruction *s_instrs;
    int s_allocated;
    int s_used;

    int *s_labelmap;       /* label id --> instr offset */
    int s_labelmap_size;
    int s_next_free_label; /* next free label id */
} _PyCompile_InstructionSequence;

typedef struct {
    PyObject *u_name;
    PyObject *u_qualname;  /* dot-separated qualified name (lazy) */

    /* The following fields are dicts that map objects to
       the index of them in co_XXX.      The index is used as
       the argument for opcodes that refer to those collections.
    */
    PyObject *u_consts;    /* all constants */
    PyObject *u_names;     /* all names */
    PyObject *u_varnames;  /* local variables */
    PyObject *u_cellvars;  /* cell variables */
    PyObject *u_freevars;  /* free variables */
    PyObject *u_fasthidden; /* dict; keys are names that are fast-locals only
                               temporarily within an inlined comprehension. When
                               value is True, treat as fast-local. */

    Py_ssize_t u_argcount;        /* number of arguments for block */
    Py_ssize_t u_posonlyargcount;        /* number of positional only arguments for block */
    Py_ssize_t u_kwonlyargcount; /* number of keyword only arguments for block */

    int u_firstlineno; /* the first lineno of the block */
} _PyCompile_CodeUnitMetadata;


/* Utility for a number of growing arrays used in the compiler */
int _PyCompile_EnsureArrayLargeEnough(
        int idx,
        void **array,
        int *alloc,
        int default_alloc,
        size_t item_size);

int _PyCompile_ConstCacheMergeOne(PyObject *const_cache, PyObject **obj);

int _PyCompile_InstrSize(int opcode, int oparg);

/* Access compiler internals for unit testing */

PyAPI_FUNC(PyObject*) _PyCompile_CodeGen(
        PyObject *ast,
        PyObject *filename,
        PyCompilerFlags *flags,
        int optimize,
        int compile_mode);

PyAPI_FUNC(PyObject*) _PyCompile_OptimizeCfg(
        PyObject *instructions,
        PyObject *consts,
        int nlocals);

PyAPI_FUNC(PyCodeObject*)
_PyCompile_Assemble(_PyCompile_CodeUnitMetadata *umd, PyObject *filename,
                    PyObject *instructions);

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_COMPILE_H */