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# Crown Copyright (c) 1997
#
# This TenDRA(r) Computer Program is subject to Copyright
# owned by the United Kingdom Secretary of State for Defence
# acting through the Defence Evaluation and Research Agency
# (DERA). It is made available to Recipients with a
# royalty-free licence for its use, reproduction, transfer
# to other parties and amendment for any purpose not excluding
# product development provided that any such use et cetera
# shall be deemed to be acceptance of the following conditions:-
#
# (1) Its Recipients shall ensure that this Notice is
# reproduced upon any copies or amended versions of it;
#
# (2) Any amended version of it shall be clearly marked to
# show both the nature of and the organisation responsible
# for the relevant amendment or amendments;
#
# (3) Its onward transfer from a recipient to another
# party shall be deemed to be that party's acceptance of
# these conditions;
#
# (4) DERA gives no warranty or assurance as to its
# quality or suitability for any purpose and DERA accepts
# no liability whatsoever in relation to any use to which
# it may be put.
#
#
# STANDARD TOKEN DECLARATIONS
#
# The following tokens need to be declared.
#
( make_tokdec ~comp_off ( exp ) exp )
( make_tokdec ~ptr_to_ptr ( alignment alignment exp ) exp )
( make_tokdec ~char variety )
( make_tokdec ~signed_int variety )
( make_tokdec ~signed_short variety )
( make_tokdec ~cpp.offset.div ( exp ) exp )
( make_tokdec ~cpp.offset.mult ( alignment exp ) exp )
( make_tokdec ~cpp.vtab.func_exp ( exp exp ) exp )
( make_tokdec ~cpp.vtab.diag shape )
#
# POINTER TO MEMBER FUNCTION TYPE
#
# This token gives the type of a pointer to member function.
#
( local make_tokdef union
shape
( compound
( ~comp_off
( offset_max
( shape_offset proc )
( shape_offset ( integer ~signed_short ) ) ) ) ) )
( local make_tokdef delta
exp
( offset_zero ( alignment ( integer ~signed_short ) ) ) )
( local make_tokdef index
exp
( offset_pad
( alignment ( integer ~signed_short ) )
( offset_add
delta
( shape_offset ( integer ~signed_short ) ) ) ) )
( local make_tokdef func
exp
( offset_pad
( alignment union )
( offset_add
index
( shape_offset ( integer ~signed_short ) ) ) ) )
( local make_tokdef ptr_mem_func
shape
( compound
( ~comp_off
( offset_add
func
( shape_offset union ) ) ) ) )
#
# NULL POINTER TO MEMBER FUNCTION
#
# These tokens gives the value of the null pointer to member function.
# There are two of them to work round an installer bug.
#
( make_tokdef ~cpp.pmf.null
exp
( make_compound
( shape_offset ptr_mem_func )
delta
( make_int ~signed_short 0 )
index
( make_int ~signed_short 0 )
func
( make_compound
( shape_offset union )
( offset_zero ( alignment proc ) )
make_null_proc ) ) )
( make_tokdef ~cpp.pmf.null2
exp
( make_compound
( shape_offset ptr_mem_func )
delta
( make_int ~signed_short 0 )
index
( make_int ~signed_short 0 )
func
( make_compound
( shape_offset union )
( offset_zero ( alignment proc ) )
make_null_proc ) ) )
#
# CONSTRUCT A POINTER TO MEMBER FUNCTION
#
# These tokens construct a pointer to member function expression.
# There are two cases, one for non-virtual functions and one for
# virtual functions.
#
( make_tokdef ~cpp.pmf.make
( exp a exp b exp c ) exp
( make_compound
( shape_offset ptr_mem_func )
delta
( change_variety impossible ~signed_short
( minus wrap
( ~cpp.offset.div b )
( ~cpp.offset.div c ) ) )
index
( make_int ~signed_short -1 )
func
( make_compound
( shape_offset union )
( offset_zero ( alignment proc ) )
a ) ) )
( make_tokdef ~cpp.pmf.vmake
( signed_nat a exp b exp c exp d ) exp
( make_compound
( shape_offset ptr_mem_func )
delta
( change_variety impossible ~signed_short
( minus wrap
( ~cpp.offset.div c )
( ~cpp.offset.div d ) ) )
index
( make_int ~signed_short a )
func
( make_compound
( shape_offset union )
( offset_zero ( alignment ( integer ~signed_short ) ) )
( change_variety impossible ~signed_short
( ~cpp.offset.div b ) ) ) ) )
#
# DECONSTRUCT A POINTER TO MEMBER FUNCTION
#
# These tokens give the various components of the pointer to member
# function a.
#
( make_tokdef ~cpp.pmf.func
( exp a ) exp
( contents proc ( add_to_ptr a func ) ) )
( local make_tokdef ~cpp.pmf.index
( exp a ) exp
( change_variety impossible ~signed_int
( contents ( integer ~signed_short )
( add_to_ptr a index ) ) ) )
( make_tokdef ~cpp.pmf.delta
( alignment a exp b ) exp
( ~cpp.offset.mult a
( change_variety impossible ~signed_int
( contents ( integer ~signed_short )
( add_to_ptr b delta ) ) ) ) )
( local make_tokdef ~cpp.pmf.voff
( exp a ) exp
( change_variety impossible ~signed_int
( contents ( integer ~signed_short )
( add_to_ptr a func ) ) ) )
#
# FIND AN ACTUAL POINTER TO MEMBER FUNCTION
#
# This token modifies the pointer to member function expression a if it
# represents a virtual function by indexing into the virtual function
# for the pointer b of alignment c.
#
( make_tokdef ~cpp.pmf.virt
( exp a exp b alignment c ) exp
( identify i
( ~cpp.pmf.index a )
( conditional lab
( sequence
( integer_test greater_than lab
( obtain_tag i )
( make_int ~signed_int 0 ) )
( assign a
( contents ptr_mem_func
( ~cpp.vtab.func_exp
( add_to_ptr
( ~ptr_to_ptr
c
( alignment ~cpp.vtab.diag )
b )
( ~cpp.offset.mult
( alignment ~cpp.vtab.diag )
( ~cpp.pmf.voff a ) ) )
( obtain_tag i ) ) ) ) )
make_top ) ) )
#
# POINTER TO MEMBER FUNCTION TEST
#
# These tokens describe how to compare two pointer to member functions a
# and b and how to compare a against the null pointer to member function.
# Note that a and b are evaluated more than once in the comparison token,
# therefore it may be necessary to introduce an identity before calling it.
#
( make_tokdef ~cpp.pmf.compare
( exp a exp b label lab ntest n ) exp
( identify i
( ~cpp.pmf.index a )
( variable flag
( make_int ~signed_int 0 )
( sequence
( conditional lab1
( sequence
( integer_test equal lab1
( obtain_tag i )
( ~cpp.pmf.index b ) )
( offset_test equal lab1
( ~cpp.pmf.delta
( alignment ( integer ~char ) ) a )
( ~cpp.pmf.delta
( alignment ( integer ~char ) ) b ) )
( conditional lab2
( sequence
( integer_test less_than lab2
( obtain_tag i )
( make_int ~signed_int 0 ) )
( proc_test not_equal lab2
( ~cpp.pmf.func a )
( ~cpp.pmf.func b ) ) )
( assign
( obtain_tag flag )
( make_int ~signed_int 1 ) ) ) )
make_top )
( integer_test n lab
( contents
( integer ~signed_int )
( obtain_tag flag ) )
( make_int ~signed_int 1 ) ) ) ) ) )
( make_tokdef ~cpp.pmf.test
( exp a label lab ntest n ) exp
( integer_test n lab
( ~cpp.pmf.index a )
( make_int ~signed_int 0 ) ) )
#
# POINTER TO MEMBER FUNCTION CASTS
#
# These tokens cast a pointer to member function to or from a base class.
# b gives the base class offset, c gives the virtual function number offset,
# and d gives the offset of the virtual function table.
#
( make_tokdef ~cpp.pmf.cast
( exp a exp b exp c exp d ) exp
( identify i
( ~cpp.pmf.index a )
( conditional lab
( sequence
( integer_test not_equal lab
( obtain_tag i )
( make_int ~signed_int 0 ) )
( assign ( add_to_ptr a delta )
( change_variety impossible ~signed_short
( plus wrap
( change_variety impossible ~signed_int
( contents ( integer ~signed_short )
( add_to_ptr a delta ) ) )
( ~cpp.offset.div b ) ) ) )
( conditional lab2
( sequence
( integer_test greater_than lab2
( obtain_tag i )
( make_int ~signed_int 0 ) )
( assign ( add_to_ptr a index )
( change_variety impossible ~signed_short
( plus wrap ( obtain_tag i ) c ) ) )
( assign ( add_to_ptr a func )
( change_variety impossible ~signed_short
( ~cpp.offset.div d ) ) ) )
make_top ) )
make_top ) ) )
( make_tokdef ~cpp.pmf.uncast
( exp a exp b exp c exp d ) exp
( identify i
( ~cpp.pmf.index a )
( conditional lab
( sequence
( integer_test not_equal lab
( obtain_tag i )
( make_int ~signed_int 0 ) )
( assign ( add_to_ptr a delta )
( change_variety impossible ~signed_short
( minus wrap
( change_variety impossible ~signed_int
( contents ( integer ~signed_short )
( add_to_ptr a delta ) ) )
( ~cpp.offset.div b ) ) ) )
( conditional lab2
( sequence
( integer_test greater_than lab2
( obtain_tag i )
( make_int ~signed_int 0 ) )
( assign ( add_to_ptr a index )
( change_variety impossible ~signed_short
( minus wrap ( obtain_tag i ) c ) ) )
( assign ( add_to_ptr a func )
( change_variety impossible ~signed_short
( ~cpp.offset.div d ) ) ) )
make_top ) )
make_top ) ) )
Generated by GNU Enscript 1.6.6.