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stdlib_linalg: declare the diag function as pure #980

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Apr 22, 2025
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stdlib_linalg: declare the diag function as pure #980

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stdlib_linalg: declare the `diag` function as pure
zoziha Apr 20, 2025
29cf716
docs(stdlib_linalg): add description of 'Class' as Pure function for …
zoziha Apr 21, 2025
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4 changes: 4 additions & 0 deletions doc/specs/stdlib_linalg.md
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Expand Up @@ -187,6 +187,10 @@ to the original.

Stable

### Class

Pure function.

### Description

Create a diagonal array or extract the diagonal elements of an array
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8 changes: 4 additions & 4 deletions src/stdlib_linalg.fypp
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Expand Up @@ -154,13 +154,13 @@ module stdlib_linalg
! Vector to matrix
!
#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$(v) result(res)
module pure function diag_${t1[0]}$${k1}$(v) result(res)
${t1}$, intent(in) :: v(:)
${t1}$ :: res(size(v),size(v))
end function diag_${t1[0]}$${k1}$
#:endfor
#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$_k(v,k) result(res)
module pure function diag_${t1[0]}$${k1}$_k(v,k) result(res)
${t1}$, intent(in) :: v(:)
integer, intent(in) :: k
${t1}$ :: res(size(v)+abs(k),size(v)+abs(k))
Expand All @@ -171,13 +171,13 @@ module stdlib_linalg
! Matrix to vector
!
#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$_mat(A) result(res)
module pure function diag_${t1[0]}$${k1}$_mat(A) result(res)
${t1}$, intent(in) :: A(:,:)
${t1}$ :: res(minval(shape(A)))
end function diag_${t1[0]}$${k1}$_mat
#:endfor
#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$_mat_k(A,k) result(res)
module pure function diag_${t1[0]}$${k1}$_mat_k(A,k) result(res)
${t1}$, intent(in) :: A(:,:)
integer, intent(in) :: k
${t1}$ :: res(minval(shape(A))-abs(k))
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8 changes: 4 additions & 4 deletions src/stdlib_linalg_diag.fypp
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Expand Up @@ -7,7 +7,7 @@ submodule (stdlib_linalg) stdlib_linalg_diag
contains

#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$(v) result(res)
module pure function diag_${t1[0]}$${k1}$(v) result(res)
${t1}$, intent(in) :: v(:)
${t1}$ :: res(size(v),size(v))
integer :: i
Expand All @@ -20,7 +20,7 @@ contains


#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$_k(v,k) result(res)
module pure function diag_${t1[0]}$${k1}$_k(v,k) result(res)
${t1}$, intent(in) :: v(:)
integer, intent(in) :: k
${t1}$ :: res(size(v)+abs(k),size(v)+abs(k))
Expand All @@ -44,7 +44,7 @@ contains
#:endfor

#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$_mat(A) result(res)
module pure function diag_${t1[0]}$${k1}$_mat(A) result(res)
${t1}$, intent(in) :: A(:,:)
${t1}$ :: res(minval(shape(A)))
integer :: i
Expand All @@ -55,7 +55,7 @@ contains
#:endfor

#:for k1, t1 in RCI_KINDS_TYPES
module function diag_${t1[0]}$${k1}$_mat_k(A,k) result(res)
module pure function diag_${t1[0]}$${k1}$_mat_k(A,k) result(res)
${t1}$, intent(in) :: A(:,:)
integer, intent(in) :: k
${t1}$ :: res(minval(shape(A))-abs(k))
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