From 8466d8cfa486fb30d1755c4261b781135083787b Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 20 Feb 2017 00:05:29 -0800
Subject: Import Upstream version 3a1

---
 arraymap.txi | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 arraymap.txi

(limited to 'arraymap.txi')

diff --git a/arraymap.txi b/arraymap.txi
new file mode 100644
index 0000000..f10ad65
--- /dev/null
+++ b/arraymap.txi
@@ -0,0 +1,68 @@
+@code{(require 'array-for-each)}
+@ftindex array-for-each
+
+
+@deffn {Procedure} array-map! array0 proc array1 @dots{}
+
+@var{array1}, @dots{} must have the same number of dimensions as
+@var{array0} and have a range for each index which includes the range
+for the corresponding index in @var{array0}.  @var{proc} is applied to
+each tuple of elements of @var{array1} @dots{} and the result is stored
+as the corresponding element in @var{array0}.  The value returned is
+unspecified.  The order of application is unspecified.
+@end deffn
+
+@defun array-map prototype proc array1 array2 @dots{}
+
+@var{array2}, @dots{} must have the same number of dimensions as
+@var{array1} and have a range for each index which includes the
+range for the corresponding index in @var{array1}.  @var{proc} is
+applied to each tuple of elements of @var{array1}, @var{array2},
+@dots{} and the result is stored as the corresponding element in a
+new array of type @var{prototype}.  The new array is returned.  The
+order of application is unspecified.
+@end defun
+
+@defun array-for-each proc array0 @dots{}
+
+@var{proc} is applied to each tuple of elements of @var{array0} @dots{}
+in row-major order.  The value returned is unspecified.
+@end defun
+
+@defun array-indexes array
+
+Returns an array of lists of indexes for @var{array} such that, if
+@var{li} is a list of indexes for which @var{array} is defined,
+(equal?  @var{li} (apply array-ref (array-indexes @var{array})
+@var{li})).
+@end defun
+
+@deffn {Procedure} array-index-map! array proc
+
+applies @var{proc} to the indices of each element of @var{array} in
+turn, storing the result in the corresponding element.  The value
+returned and the order of application are unspecified.
+
+One can implement @var{array-indexes} as
+@example
+(define (array-indexes array)
+    (let ((ra (apply create-array '#() (array-shape array))))
+      (array-index-map! ra (lambda x x))
+      ra))
+@end example
+Another example:
+@example
+(define (apl:index-generator n)
+    (let ((v (make-vector n 1)))
+      (array-index-map! v (lambda (i) i))
+      v))
+@end example
+@end deffn
+
+@deffn {Procedure} array-copy! source destination
+
+Copies every element from vector or array @var{source} to the
+corresponding element of @var{destination}.  @var{destination} must
+have the same rank as @var{source}, and be at least as large in each
+dimension.  The order of copying is unspecified.
+@end deffn
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