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|
# 1 "def.cppo"
(* This macro application combinator provides call-by-value
semantics: the actual argument is evaluated up front and
its value is bound to a variable, which is passed as an
argument to the macro [F]. *)
# 10 "def.cppo"
(* Some trivial tests. *)
# 13 "def.cppo"
let forty_one =
# 13 "def.cppo"
(let __x = ( 41) in __x )
(* Multiple lines permitted; no backslash required. *)
# 14 "def.cppo"
let forty_two =
# 14 "def.cppo"
(let __x = ( 42 ) in __x )
(* Multiple lines permitted; no backslash required. *)
# 16 "def.cppo"
(* A [for]-loop macro. *)
# 25 "def.cppo"
(* A [for]-loop macro that performs unrolling. *)
# 47 "def.cppo"
(* In the examples that follow, #scope ... #endscope is used to
avoid the need to #undefine local macros such as BODY and F. *)
(* Iteration over an array, with a normal loop. *)
let iter f a =
# 54 "def.cppo"
(
for __index = 0 to Array.length a-1 do
(f a.(__index))
done
)
# 57 "def.cppo"
(* Iteration over an array, with an unrolled loop. *)
let unrolled_iter f a =
# 61 "def.cppo"
(
(* #define can be nested inside #def. *)
(* #def can be nested inside #def. *)
let __finish = ( Array.length a) in
let __index = ref (0) in
while !__index + 2 <= __finish do
(let __x = ( !__index) in (f a.(__x)) )
(* Multiple lines permitted; no backslash required. *)
;
(let __x = ( !__index + 1) in (f a.(__x)) )
(* Multiple lines permitted; no backslash required. *)
;
__index := !__index + 2
done;
while !__index < __finish do
(let __x = ( !__index) in (f a.(__x)) )
(* Multiple lines permitted; no backslash required. *)
;
__index := !__index + 1
done
)
# 64 "def.cppo"
(* Printing an array, with a normal loop. *)
let print_int_array a =
# 68 "def.cppo"
(
for __index = 0 to Array.length a-1 do
Printf.printf "%d" a.(__index)
done
)
# 71 "def.cppo"
(* A higher-order macro that produces a definition of [iter],
and accepts an arbitrary definition of the macro [LOOP]. *)
# 81 "def.cppo"
(* Some noise, which does not affect the above definitions. *)
# 84 "def.cppo"
let iter f a =
(
for __index = 0 to Array.length a-1 do
(f a.(__index))
done
)
# 85 "def.cppo"
let unrolled_iter f a =
(
(* #define can be nested inside #def. *)
(* #def can be nested inside #def. *)
let __finish = ( Array.length a) in
let __index = ref (0) in
while !__index + 2 <= __finish do
(let __x = ( !__index) in (f a.(__x)) )
(* Multiple lines permitted; no backslash required. *)
;
(let __x = ( !__index + 1) in (f a.(__x)) )
(* Multiple lines permitted; no backslash required. *)
;
__index := !__index + 2
done;
while !__index < __finish do
(let __x = ( !__index) in (f a.(__x)) )
(* Multiple lines permitted; no backslash required. *)
;
__index := !__index + 1
done
)
# 87 "def.cppo"
(* Just because we can, undefine BODY. *)
|
