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Copy pathscope.h
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66 lines (61 loc) · 2.35 KB
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enum {
ID_INFO_KIND_GLOBAL_IMPLICIT,
ID_INFO_KIND_GLOBAL_EXPLICIT,
ID_INFO_KIND_LOCAL, // in a function f, written and only referenced by f
ID_INFO_KIND_CELL, // in a function f, read/written by children of f
ID_INFO_KIND_FREE, // in a function f, belongs to the parent of f
};
typedef struct _id_info_t {
// TODO compress this info to make structure smaller in memory
bool param;
int kind;
qstr qstr;
// when it's an ID_INFO_KIND_LOCAL this is the unique number of the local
// whet it's an ID_INFO_KIND_CELL/FREE this is the unique number of the closed over variable
int local_num;
} id_info_t;
// taken from python source, Include/code.h
#define SCOPE_FLAG_OPTIMISED 0x0001
#define SCOPE_FLAG_NEWLOCALS 0x0002
#define SCOPE_FLAG_VARARGS 0x0004
#define SCOPE_FLAG_VARKEYWORDS 0x0008
#define SCOPE_FLAG_NESTED 0x0010
#define SCOPE_FLAG_GENERATOR 0x0020
/* The SCOPE_FLAG_NOFREE flag is set if there are no free or cell variables.
This information is redundant, but it allows a single flag test
to determine whether there is any extra work to be done when the
call frame is setup.
*/
#define SCOPE_FLAG_NOFREE 0x0040
// scope is a "block" in Python parlance
typedef enum { SCOPE_MODULE, SCOPE_FUNCTION, SCOPE_LAMBDA, SCOPE_LIST_COMP, SCOPE_DICT_COMP, SCOPE_SET_COMP, SCOPE_GEN_EXPR, SCOPE_CLASS } scope_kind_t;
typedef struct _scope_t {
scope_kind_t kind;
struct _scope_t *parent;
struct _scope_t *next;
mp_parse_node_t pn;
qstr simple_name;
int id_info_alloc;
int id_info_len;
id_info_t *id_info;
int flags;
int num_params;
/* not needed
int num_default_params;
int num_dict_params;
*/
int num_locals;
int num_cells;
int stack_size;
uint unique_code_id;
uint emit_options;
} scope_t;
scope_t *scope_new(scope_kind_t kind, mp_parse_node_t pn, uint unique_code_id, uint emit_options);
id_info_t *scope_find_or_add_id(scope_t *scope, qstr qstr, bool *added);
id_info_t *scope_find(scope_t *scope, qstr qstr);
id_info_t *scope_find_global(scope_t *scope, qstr qstr);
id_info_t *scope_find_local_in_parent(scope_t *scope, qstr qstr);
void scope_close_over_in_parents(scope_t *scope, qstr qstr);
void scope_declare_global(scope_t *scope, qstr qstr);
void scope_declare_nonlocal(scope_t *scope, qstr qstr);
void scope_print_info(scope_t *s);