fix instantiation bug

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
         os:
           - ubuntu-latest
           - macOS-latest
-          # - windows-latest # run on AppVeyor instead
+          - windows-latest
         arch:
           - x64
           - x86

Project.toml

@@ -1,7 +1,7 @@
 name = "TensorOperations"
 uuid = "6aa20fa7-93e2-5fca-9bc0-fbd0db3c71a2"
 authors = ["Lukas Devos <lukas.devos@ugent.be>", "Maarten Van Damme <maartenvd1994@gmail.com>", "Jutho Haegeman <jutho.haegeman@ugent.be>"]
-version = "4.0.7"
+version = "4.0.8"
 
 [deps]
 CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
@@ -15,29 +15,29 @@ TupleTools = "9d95972d-f1c8-5527-a6e0-b4b365fa01f6"
 VectorInterface = "409d34a3-91d5-4945-b6ec-7529ddf182d8"
 cuTENSOR = "011b41b2-24ef-40a8-b3eb-fa098493e9e1"
 
-[weakdeps]
-CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
-ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
-cuTENSOR = "011b41b2-24ef-40a8-b3eb-fa098493e9e1"
-
-[extensions]
-TensorOperationsChainRulesCoreExt = "ChainRulesCore"
-TensorOperationscuTENSORExt = ["cuTENSOR", "CUDA"]
-
 [compat]
-Aqua = "0.6, 0.7"
+Aqua = "0.6, 0.7, 0.8"
 CUDA = "4,5"
 ChainRulesCore = "1"
+ChainRulesTestUtils = "1"
 DynamicPolynomials = "0.5"
 LRUCache = "1"
+LinearAlgebra = "1.6"
+Logging = "1.6"
 PackageExtensionCompat = "1"
+Random = "1"
 Strided = "2.0.4"
 StridedViews = "0.2"
+Test = "1"
 TupleTools = "1.1"
 VectorInterface = "0.4.1"
 cuTENSOR = "1"
 julia = "1.6"
 
+[extensions]
+TensorOperationsChainRulesCoreExt = "ChainRulesCore"
+TensorOperationscuTENSORExt = ["cuTENSOR", "CUDA"]
+
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
 CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
@@ -50,3 +50,8 @@ cuTENSOR = "011b41b2-24ef-40a8-b3eb-fa098493e9e1"
 
 [targets]
 test = ["Test", "Random", "DynamicPolynomials", "ChainRulesTestUtils", "CUDA", "cuTENSOR", "Aqua", "Logging"]
+
+[weakdeps]
+CUDA = "052768ef-5323-5732-b1bb-66c8b64840ba"
+ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
+cuTENSOR = "011b41b2-24ef-40a8-b3eb-fa098493e9e1"

README.md

@@ -12,7 +12,6 @@ Fast tensor operations using a convenient Einstein index notation.
 |:----------------:|:------------:|:------------:|:---------------------:|
 | [![CI][ci-img]][ci-url] | [![PkgEval][pkgeval-img]][pkgeval-url] | [![Codecov][codecov-img]][codecov-url] | [![Aqua QA][aqua-img]][aqua-url] |
 
-
 [docs-stable-img]: https://img.shields.io/badge/docs-stable-blue.svg
 [docs-stable-url]: https://jutho.github.io/TensorOperations.jl/stable
 

src/implementation/indices.jl

@@ -108,7 +108,7 @@ function contract_indices(IA::NTuple{NA,Any}, IB::NTuple{NB,Any},
 end
 
 #-------------------------------------------------------------------------------------------
-# Generate index information
+# Convert indices to einsum labels: useful for package extensions / add-ons (e.g. TBLIS)
 #-------------------------------------------------------------------------------------------
 const OFFSET_OPEN = 'a' - 1
 const OFFSET_CLOSED = 'A' - 1

src/indexnotation/analyzers.jl

@@ -53,10 +53,11 @@ function decomposegeneraltensor(ex)
                count(a -> isgeneraltensor(a), ex.args) == 1 # scalar multiplication: multiply scalar factors
             idx = findfirst(a -> isgeneraltensor(a), ex.args)
             (object, leftind, rightind, α, conj) = decomposegeneraltensor(ex.args[idx])
-            scalars = Expr(:call)
-            append!(scalars.args, deepcopy(ex.args))
-            scalars.args[idx] = α
-            return (object, leftind, rightind, scalars, conj)
+            scalar = One()
+            for i in 2:length(ex.args)
+                scalar = simplify_scalarmul(scalar, i == idx ? α : ex.args[i])
+            end
+            return (object, leftind, rightind, scalar, conj)
         elseif ex.args[1] == :/ && length(ex.args) == 3 # scalar multiplication: muliply scalar factors
             if isscalarexpr(ex.args[3]) && isgeneraltensor(ex.args[2])
                 (object, leftind, rightind, α, conj) = decomposegeneraltensor(ex.args[2])
@@ -208,6 +209,26 @@ function getallindices(ex)
     return Any[]
 end
 
+function simplify_scalarmul(exa, exb)
+    if exa === One()
+        return exb
+    elseif exb === One()
+        return exa
+    end
+    if isexpr(exa, :call) && exa.args[1] == :* && isexpr(exb, :call) && exb.args[1] == :*
+        return Expr(:call, :*, exa.args[2:end]..., exb.args[2:end]...)
+    elseif isexpr(exa, :call) && exa.args[1] == *
+        return Expr(:call, :*, exa.args[2:end]..., exb)
+    elseif isexpr(exb, :call) && exb.args[1] == *
+        return Expr(:call, :*, exa, exb.args[2:end]...)
+    else
+        return Expr(:call, :*, exa, exb)
+    end
+end
+function simplify_scalarmul(exa, exb, exc, exd...)
+    return simplify_scalarmul(simplify_scalarmul(exa, exb), exc, exd...)
+end
+
 # # auxiliary routine
 # function unique2(itr)
 #     out = collect(itr)

src/indexnotation/contractiontrees.jl

@@ -21,8 +21,8 @@ function processcontractions(ex, treebuilder, treesorter, costcheck)
     elseif isexpr(ex, :macrocall) && ex.args[1] == Symbol("@notensor")
         return ex
     elseif isexpr(ex, :call) && ex.args[1] == :tensorscalar
-        return Expr(:call, :tensorscalar,
-                    processcontractions(ex.args[2], treebuilder, treesorter, costcheck))
+        return processcontractions(ex.args[2], treebuilder, treesorter, costcheck)
+        # `tensorscalar` will be reinserted automatically
     elseif isassignment(ex) || isdefinition(ex)
         lhs, rhs = getlhs(ex), getrhs(ex)
         rhs, pre, post = _processcontractions(rhs, treebuilder, treesorter, costcheck)
@@ -57,14 +57,23 @@ end
 
 function insertcontractiontrees!(ex, treebuilder, treesorter, costcheck, preexprs,
                                  postexprs)
+    if isexpr(ex, :call) && ex.args[1] == :tensorscalar
+        return insertcontractiontrees!(ex.args[2], treebuilder, treesorter, costcheck,
+                                       preexprs, postexprs)
+    end
     if isexpr(ex, :call)
         args = ex.args
         nargs = length(args)
         ex = Expr(:call, args[1],
                   (insertcontractiontrees!(args[i], treebuilder, treesorter, costcheck,
                                            preexprs, postexprs) for i in 2:nargs)...)
     end
-    if istensorcontraction(ex) && length(ex.args) > 3
+    if !istensorcontraction(ex)
+        return ex
+    end
+    if length(ex.args) <= 3
+        return isempty(getindices(ex)) ? Expr(:call, :tensorscalar, ex) : ex
+    else
         args = ex.args[2:end]
         network = map(getindices, args)
         for a in getallindices(ex)
@@ -137,7 +146,6 @@ function insertcontractiontrees!(ex, treebuilder, treesorter, costcheck, preexpr
         push!(postexprs, removelinenumbernode(costcompareex))
         return treeex
     end
-    return ex
 end
 
 function treecost(tree, network, costs)
@@ -175,9 +183,14 @@ function defaulttreesorter(args, tree)
     if isa(tree, Int)
         return args[tree]
     else
-        return Expr(:call, :*,
-                    defaulttreesorter(args, tree[1]),
-                    defaulttreesorter(args, tree[2]))
+        ex = Expr(:call, :*,
+                  defaulttreesorter(args, tree[1]),
+                  defaulttreesorter(args, tree[2]))
+        if isempty(getindices(ex))
+            return Expr(:call, :tensorscalar, ex)
+        else
+            return ex
+        end
     end
 end