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# Crown Copyright (c) 1997
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#
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# This TenDRA(r) Computer Program is subject to Copyright
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# owned by the United Kingdom Secretary of State for Defence
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# acting through the Defence Evaluation and Research Agency
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# (DERA). It is made available to Recipients with a
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# royalty-free licence for its use, reproduction, transfer
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# to other parties and amendment for any purpose not excluding
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# product development provided that any such use et cetera
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# shall be deemed to be acceptance of the following conditions:-
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#
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# (1) Its Recipients shall ensure that this Notice is
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# reproduced upon any copies or amended versions of it;
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#
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# (2) Any amended version of it shall be clearly marked to
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# show both the nature of and the organisation responsible
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# for the relevant amendment or amendments;
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#
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# (3) Its onward transfer from a recipient to another
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# party shall be deemed to be that party's acceptance of
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# these conditions;
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#
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# (4) DERA gives no warranty or assurance as to its
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# quality or suitability for any purpose and DERA accepts
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# no liability whatsoever in relation to any use to which
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# it may be put.
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#
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#
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# STANDARD TOKEN DECLARATIONS
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#
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# The following tokens need to be declared.
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#
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( make_tokdec ~comp_off ( exp ) exp )
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( make_tokdec ~ptr_to_ptr ( alignment alignment exp ) exp )
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( make_tokdec ~char variety )
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( make_tokdec ~signed_int variety )
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( make_tokdec ~signed_short variety )
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( make_tokdec ~cpp.offset.div ( exp ) exp )
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( make_tokdec ~cpp.offset.mult ( alignment exp ) exp )
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( make_tokdec ~cpp.vtab.func_exp ( exp exp ) exp )
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( make_tokdec ~cpp.vtab.diag shape )
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#
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# POINTER TO MEMBER FUNCTION TYPE
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#
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# This token gives the type of a pointer to member function.
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#
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( local make_tokdef union
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shape
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( compound
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( ~comp_off
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( offset_max
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( shape_offset proc )
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( shape_offset ( integer ~signed_short ) ) ) ) ) )
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( local make_tokdef delta
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exp
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( offset_zero ( alignment ( integer ~signed_short ) ) ) )
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( local make_tokdef index
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exp
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( offset_pad
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( alignment ( integer ~signed_short ) )
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( offset_add
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delta
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( shape_offset ( integer ~signed_short ) ) ) ) )
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( local make_tokdef func
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exp
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( offset_pad
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( alignment union )
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( offset_add
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index
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( shape_offset ( integer ~signed_short ) ) ) ) )
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( local make_tokdef ptr_mem_func
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shape
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( compound
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( ~comp_off
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( offset_add
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func
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( shape_offset union ) ) ) ) )
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#
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# NULL POINTER TO MEMBER FUNCTION
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#
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# These tokens gives the value of the null pointer to member function.
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# There are two of them to work round an installer bug.
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#
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( make_tokdef ~cpp.pmf.null
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exp
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( make_compound
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( shape_offset ptr_mem_func )
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delta
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( make_int ~signed_short 0 )
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index
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( make_int ~signed_short 0 )
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func
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( make_compound
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( shape_offset union )
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( offset_zero ( alignment proc ) )
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make_null_proc ) ) )
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( make_tokdef ~cpp.pmf.null2
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exp
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( make_compound
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( shape_offset ptr_mem_func )
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delta
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( make_int ~signed_short 0 )
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index
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( make_int ~signed_short 0 )
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func
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( make_compound
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( shape_offset union )
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( offset_zero ( alignment proc ) )
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make_null_proc ) ) )
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#
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# CONSTRUCT A POINTER TO MEMBER FUNCTION
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#
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# These tokens construct a pointer to member function expression.
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# There are two cases, one for non-virtual functions and one for
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# virtual functions.
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#
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( make_tokdef ~cpp.pmf.make
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( exp a exp b exp c ) exp
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( make_compound
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( shape_offset ptr_mem_func )
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delta
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( change_variety impossible ~signed_short
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( minus wrap
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( ~cpp.offset.div b )
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( ~cpp.offset.div c ) ) )
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index
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( make_int ~signed_short -1 )
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func
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( make_compound
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( shape_offset union )
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( offset_zero ( alignment proc ) )
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a ) ) )
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( make_tokdef ~cpp.pmf.vmake
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( signed_nat a exp b exp c exp d ) exp
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( make_compound
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( shape_offset ptr_mem_func )
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delta
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( change_variety impossible ~signed_short
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( minus wrap
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( ~cpp.offset.div c )
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( ~cpp.offset.div d ) ) )
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index
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( make_int ~signed_short a )
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func
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( make_compound
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( shape_offset union )
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( offset_zero ( alignment ( integer ~signed_short ) ) )
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( change_variety impossible ~signed_short
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( ~cpp.offset.div b ) ) ) ) )
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#
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# DECONSTRUCT A POINTER TO MEMBER FUNCTION
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#
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# These tokens give the various components of the pointer to member
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# function a.
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#
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( make_tokdef ~cpp.pmf.func
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( exp a ) exp
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( contents proc ( add_to_ptr a func ) ) )
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( local make_tokdef ~cpp.pmf.index
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( exp a ) exp
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( change_variety impossible ~signed_int
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( contents ( integer ~signed_short )
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( add_to_ptr a index ) ) ) )
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( make_tokdef ~cpp.pmf.delta
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( alignment a exp b ) exp
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( ~cpp.offset.mult a
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( change_variety impossible ~signed_int
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( contents ( integer ~signed_short )
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( add_to_ptr b delta ) ) ) ) )
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( local make_tokdef ~cpp.pmf.voff
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( exp a ) exp
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( change_variety impossible ~signed_int
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( contents ( integer ~signed_short )
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( add_to_ptr a func ) ) ) )
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#
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# FIND AN ACTUAL POINTER TO MEMBER FUNCTION
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#
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# This token modifies the pointer to member function expression a if it
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# represents a virtual function by indexing into the virtual function
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# for the pointer b of alignment c.
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#
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( make_tokdef ~cpp.pmf.virt
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( exp a exp b alignment c ) exp
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( identify i
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( ~cpp.pmf.index a )
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( conditional lab
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( sequence
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( integer_test greater_than lab
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( obtain_tag i )
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( make_int ~signed_int 0 ) )
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( assign a
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( contents ptr_mem_func
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( ~cpp.vtab.func_exp
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( add_to_ptr
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( ~ptr_to_ptr
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c
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( alignment ~cpp.vtab.diag )
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b )
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( ~cpp.offset.mult
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( alignment ~cpp.vtab.diag )
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( ~cpp.pmf.voff a ) ) )
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( obtain_tag i ) ) ) ) )
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make_top ) ) )
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#
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# POINTER TO MEMBER FUNCTION TEST
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#
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# These tokens describe how to compare two pointer to member functions a
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# and b and how to compare a against the null pointer to member function.
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# Note that a and b are evaluated more than once in the comparison token,
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# therefore it may be necessary to introduce an identity before calling it.
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#
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( make_tokdef ~cpp.pmf.compare
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( exp a exp b label lab ntest n ) exp
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( identify i
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( ~cpp.pmf.index a )
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( variable flag
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( make_int ~signed_int 0 )
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( sequence
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( conditional lab1
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( sequence
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( integer_test equal lab1
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( obtain_tag i )
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( ~cpp.pmf.index b ) )
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( offset_test equal lab1
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( ~cpp.pmf.delta
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( alignment ( integer ~char ) ) a )
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( ~cpp.pmf.delta
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( alignment ( integer ~char ) ) b ) )
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( conditional lab2
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( sequence
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( integer_test less_than lab2
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( obtain_tag i )
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( make_int ~signed_int 0 ) )
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( proc_test not_equal lab2
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( ~cpp.pmf.func a )
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( ~cpp.pmf.func b ) ) )
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( assign
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( obtain_tag flag )
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( make_int ~signed_int 1 ) ) ) )
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make_top )
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( integer_test n lab
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( contents
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( integer ~signed_int )
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( obtain_tag flag ) )
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( make_int ~signed_int 1 ) ) ) ) ) )
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276 |
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( make_tokdef ~cpp.pmf.test
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( exp a label lab ntest n ) exp
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( integer_test n lab
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( ~cpp.pmf.index a )
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( make_int ~signed_int 0 ) ) )
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#
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# POINTER TO MEMBER FUNCTION CASTS
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#
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# These tokens cast a pointer to member function to or from a base class.
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# b gives the base class offset, c gives the virtual function number offset,
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# and d gives the offset of the virtual function table.
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#
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( make_tokdef ~cpp.pmf.cast
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( exp a exp b exp c exp d ) exp
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( identify i
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( ~cpp.pmf.index a )
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( conditional lab
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( sequence
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( integer_test not_equal lab
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( obtain_tag i )
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( make_int ~signed_int 0 ) )
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( assign ( add_to_ptr a delta )
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( change_variety impossible ~signed_short
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( plus wrap
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( change_variety impossible ~signed_int
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( contents ( integer ~signed_short )
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( add_to_ptr a delta ) ) )
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( ~cpp.offset.div b ) ) ) )
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( conditional lab2
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( sequence
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( integer_test greater_than lab2
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( obtain_tag i )
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( make_int ~signed_int 0 ) )
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( assign ( add_to_ptr a index )
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( change_variety impossible ~signed_short
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( plus wrap ( obtain_tag i ) c ) ) )
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( assign ( add_to_ptr a func )
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( change_variety impossible ~signed_short
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( ~cpp.offset.div d ) ) ) )
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make_top ) )
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make_top ) ) )
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321 |
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( make_tokdef ~cpp.pmf.uncast
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( exp a exp b exp c exp d ) exp
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( identify i
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325 |
( ~cpp.pmf.index a )
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( conditional lab
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( sequence
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328 |
( integer_test not_equal lab
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( obtain_tag i )
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330 |
( make_int ~signed_int 0 ) )
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331 |
( assign ( add_to_ptr a delta )
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( change_variety impossible ~signed_short
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( minus wrap
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334 |
( change_variety impossible ~signed_int
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335 |
( contents ( integer ~signed_short )
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336 |
( add_to_ptr a delta ) ) )
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337 |
( ~cpp.offset.div b ) ) ) )
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338 |
( conditional lab2
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339 |
( sequence
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340 |
( integer_test greater_than lab2
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341 |
( obtain_tag i )
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342 |
( make_int ~signed_int 0 ) )
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343 |
( assign ( add_to_ptr a index )
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344 |
( change_variety impossible ~signed_short
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345 |
( minus wrap ( obtain_tag i ) c ) ) )
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346 |
( assign ( add_to_ptr a func )
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347 |
( change_variety impossible ~signed_short
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348 |
( ~cpp.offset.div d ) ) ) )
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349 |
make_top ) )
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350 |
make_top ) ) )
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