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