Merge pull request #175 from JuliaLang/anj/checksquare

Add compatibility function Compat.LinAlg.checksquare

README.md

@@ -144,6 +144,8 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 *  `Base.tty_size` (which was not exported) is now `displaysize` in Julia 0.5.
 
+* `Compat.LinAlg.checksquare` [#14601](https://github.com/JuliaLang/julia/pull/14601)
+
 ## New macros
 
 * `@inline` and `@noinline` have been added. On 0.3, these are "no-ops," meaning they don't actually do anything.

src/Compat.jl

@@ -859,4 +859,12 @@ else  # if VERSION < v"0.5.0-dev+1182"
 
 end
 
+module LinAlg
+    if VERSION < v"0.5.0-dev+2022"
+        const checksquare = Base.LinAlg.chksquare
+    else
+        import Base.LinAlg.checksquare
+    end
+end
+
 end # module

test/runtests.jl

@@ -820,3 +820,7 @@ end
 end
 
 @test typeof(displaysize()) == @compat(Tuple{Int, Int})
+
+@test Compat.LinAlg.checksquare(randn(4,4)) == 4
+@test Compat.LinAlg.checksquare(randn(4,4), randn(3,3)) == [4,3]
+@test_throws DimensionMismatch Compat.LinAlg.checksquare(randn(4,3))