Move imports to the main file (#655)

Author: jishnub

src/ApproxFunBase.jl

@@ -47,16 +47,21 @@ import Base: values, convert, getindex, setindex!, *, +, -, ==, <, <=, >, |, !,
               asec, cot, acot, sinh, csch, asinh, acsch,
               sech, acosh, asech, tanh, coth, atanh, acoth,
               sinc, cosc, log1p, log, expm1, tan,
-              max, min, cbrt, atan, acos, asin
+              max, min, cbrt, atan, acos, asin, chop,
+              axes, IndexStyle, IndexLinear, typed_hcat, parent
 
 import Base.Broadcast: BroadcastStyle, Broadcasted, AbstractArrayStyle,
               broadcastable, DefaultArrayStyle, broadcasted
 
-import LinearAlgebra: BlasInt, BlasFloat, norm, ldiv!, mul!, det, cross,
+import LinearAlgebra: BlasFloat, norm, ldiv!, mul!, det, cross,
               qr, qr!, rank, isdiag, istril, istriu, issymmetric,
               Tridiagonal, diagm, diagm_container, factorize,
               nullspace, Hermitian, Symmetric, adjoint, transpose, char_uplo,
-              axpy!, eigvals
+              axpy!, eigvals, LU, checknonsingular, chkstride1
+
+import LinearAlgebra.LAPACK.chklapackerror
+
+import LinearAlgebra.BLAS: @blasfunc, libblas, liblapack, BlasInt
 
 import SparseArrays: blockdiag
 

src/Fun.jl

@@ -1,6 +1,7 @@
 export Fun, evaluate, values, points, extrapolate, setdomain
 export coefficients, ncoefficients, coefficient
 export integrate, differentiate, domain, space, linesum, linenorm
+export bilinearform, linebilinearform, innerproduct, lineinnerproduct
 
 include("Domain.jl")
 include("Space.jl")
@@ -637,8 +638,6 @@ inv(f::Fun) = 1/f
 
 # Integrals over two Funs, which are fast with the orthogonal weight.
 
-export bilinearform, linebilinearform, innerproduct, lineinnerproduct
-
 # Having fallbacks allow for the fast implementations.
 
 defaultbilinearform(f::Fun,g::Fun)=sum(f*g)

src/LinearAlgebra/blas.jl

@@ -1,5 +1,3 @@
-import LinearAlgebra.BLAS: @blasfunc, libblas, liblapack
-
 # Level 2
 ## mv
 ### gemv

src/LinearAlgebra/helper.jl

@@ -1,5 +1,3 @@
-import Base: chop
-
 # BLAS/linear algebra overrides
 
 @inline dot(x...) = LinearAlgebra.dot(x...)

src/LinearAlgebra/hesseneigs.jl

@@ -1,9 +1,3 @@
-
-
-
-import LinearAlgebra.BLAS: BlasInt, @blasfunc
-
-
 for (hseqr,elty) in ((:zhseqr_,:ComplexF64),)
     @eval function hesseneigvals(M::Matrix{$elty})
         if isempty(M)

src/LinearAlgebra/rowvector.jl

@@ -1,10 +1,6 @@
 # This file is based on rowvector.jl in Julia. License is MIT: https://julialang.org/license
 # The motivation for this file is to allow RowVector which doesn't transpose the entries
 
-import Base: convert, similar, length, size, axes, IndexStyle,
-            IndexLinear, @propagate_inbounds, getindex, setindex!,
-            broadcast, hcat, typed_hcat, map, parent
-
 """
     RowVector(vector)
 

src/Multivariate/Multivariate.jl

@@ -1,8 +1,8 @@
+export grad, lap, curl
+
 abstract type MultivariateFun{T,N} <: Function end
 const BivariateFun{T} = MultivariateFun{T,2}
 
-export grad, lap, curl
-
 #implements coefficients/values/evaluate
 space(f::MultivariateFun{T,N}) where {T,N}=mapreduce(k->space(f,k),⊗,1:N)
 domain(f::MultivariateFun{T,N}) where {T,N}=mapreduce(k->domain(f,k),×,1:N)

src/Spaces/QuotientSpace.jl

@@ -1,6 +1,4 @@
-import LinearAlgebra: LU, checknonsingular
-
-export QuotientSpace
+export QuotientSpace, PathologicalQuotientSpace
 
 struct QuotientSpace{S,O,D,R,LUT<:LU{R}} <: Space{D,R}
     space::S
@@ -110,14 +108,6 @@ function mutable_lu!(F::LU{T}, ::Val{Pivot} = Val(true);
     return F
 end
 
-
-
-import LinearAlgebra.BLAS.@blasfunc
-import LinearAlgebra: chkstride1, BlasInt
-import LinearAlgebra.LAPACK.chklapackerror
-
-export PathologicalQuotientSpace
-
 struct PathologicalQuotientSpace{S,O<:Operator,DD,T,RT} <: Space{DD,T}
     space::S
     bcs::O