2bf7c09222
Needed to reinstate 2 delete opcodes, to specifically check that a local is not deleted twice.
54 lines
2.0 KiB
C
54 lines
2.0 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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enum {
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ID_FLAG_IS_PARAM = 0x01,
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ID_FLAG_IS_DELETED = 0x02,
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};
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typedef struct _id_info_t {
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uint8_t kind;
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uint8_t flags;
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// when it's an ID_INFO_KIND_LOCAL this is the unique number of the local
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// whet it's an ID_INFO_KIND_CELL/FREE this is the unique number of the closed over variable
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uint16_t local_num;
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qstr qstr;
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} id_info_t;
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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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mp_parse_node_t pn;
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qstr source_file;
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qstr simple_name;
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uint unique_code_id;
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uint8_t scope_flags; // see runtime0.h
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uint8_t emit_options; // see compile.h
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uint16_t num_params;
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uint16_t num_locals;
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uint16_t stack_size; // maximum size of the locals stack
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uint16_t exc_stack_size; // maximum size of the exception stack
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uint16_t id_info_alloc;
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uint16_t id_info_len;
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id_info_t *id_info;
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} scope_t;
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scope_t *scope_new(scope_kind_t kind, mp_parse_node_t pn, qstr source_file, uint unique_code_id, uint emit_options);
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void scope_free(scope_t *scope);
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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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