Merge ca72461 into 0c4ebdc

JuliaLinearAlgebra · Jan 2, 2023 · 9b2dd05 · 9b2dd05
2 parents 0c4ebdc + ca72461
commit 9b2dd05
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/src/companion.jl b/src/companion.jl
@@ -74,8 +74,9 @@ end
 
 # Linear algebra
 
-# 3-argument mul! mutates first argument: y <= C * x
+# 3-argument mul! mutates first argument: y ⇐ C * x
 function mul!(y::Vector, C::Companion, x::AbstractVector)
+    Base.require_one_based_indexing(x)
     @boundscheck length(y) == length(x) == size(C, 1) ||
         throw(DimensionMismatch("mul! arguments incompatible sizes"))
     z = x[end]

diff --git a/src/vandermonde.jl b/src/vandermonde.jl
@@ -76,6 +76,7 @@ size(V::Vandermonde) = (length(V.c), length(V.c))
 # solvers
 
 function \(V::Adjoint{T1,<:Vandermonde{T1}}, y::AbstractVecOrMat{T2}) where {T1, T2}
+    Base.require_one_based_indexing(y)
     T = vandtype(T1,T2)
     x = Array{T}(undef, size(y))
     copyto!(x, y)
@@ -84,6 +85,7 @@ function \(V::Adjoint{T1,<:Vandermonde{T1}}, y::AbstractVecOrMat{T2}) where {T1,
 end
 
 function \(V::Transpose{T1,<:Vandermonde{T1}}, y::AbstractVecOrMat{T2}) where {T1, T2}
+    Base.require_one_based_indexing(y)
     T = vandtype(T1,T2)
     x = Array{T}(undef, size(y))
     copyto!(x, y)
@@ -92,6 +94,7 @@ function \(V::Transpose{T1,<:Vandermonde{T1}}, y::AbstractVecOrMat{T2}) where {T
 end
 
 function \(V::Vandermonde{T1}, y::AbstractVecOrMat{T2}) where {T1, T2}
+    Base.require_one_based_indexing(y)
     T = vandtype(T1,T2)
     x = Array{T}(undef, size(y))
     copyto!(x, y)