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diff --git a/doc/misc/parse_c_type.rst b/doc/misc/parse_c_type.rst
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--- a/doc/misc/parse_c_type.rst
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-==================================================
-CPython C extension module produced by recompile()
-==================================================
-
-Global variable::
-
-  _cffi_opcode_t _cffi_types[];
-
-Every _cffi_types entry is initially an odd integer.  At runtime, it
-is fixed to be a `CTypeDescrObject *` when the odd integer is
-interpreted and turned into a real <ctype> object.
-
-The generated C functions are listed in _cffi_globals, a sorted array
-of entries which get turned lazily into real <builtin function
-objects>.  Each entry in this array has an index in the _cffi_types
-array, which describe the function type (OP_FUNCTION opcode, see
-below).  We turn the odd integers describing argument and return types
-into real CTypeDescrObjects at the point where the entry is turned
-into a real builtin function object.
-
-The odd integers are "opcodes" that contain a type info in the lowest
-byte.  The remaining high bytes of the integer is an "arg" that depends
-on the type info:
-
-OP_PRIMITIVE
-    the arg tells which primitive type it is (an index in some list)
-
-OP_POINTER
-    the arg is the index of the item type in the _cffi_types array.
-
-OP_ARRAY
-    the arg is the index of the item type in the _cffi_types array.
-    followed by another opcode that contains (uintptr_t)length_of_array.
-
-OP_OPEN_ARRAY
-    for syntax like "int[]".  same as OP_ARRAY but without the length
-
-OP_STRUCT_UNION
-    the arg is the index of the struct/union in _cffi_structs_unions
-
-OP_ENUM
-    the arg is the index of the enum in _cffi_enums
-
-OP_TYPENAME
-    the arg is the index of the typename in _cffi_typenames
-
-OP_FUNCTION
-    the arg is the index of the result type in _cffi_types.
-    followed by other opcodes for the arguments.
-    terminated by OP_FUNCTION_END.
-
-OP_FUNCTION_END
-    the arg's lowest bit is set if there is a "..." argument.
-
-OP_NOOP
-    simple indirection: the arg is the index to look further in
-
-There are other opcodes, used not inside _cffi_types but in other
-individual ``type_op`` fields.  Most importantly, these are used
-on _cffi_globals entries:
-
-OP_CPYTHON_BLTN_*
-    declare a function
-
-OP_CONSTANT
-    declare a non-integral constant
-
-OP_CONSTANT_INT
-    declare an int constant
-
-OP_GLOBAL_VAR
-    declare a global var