From ee2034d1124a224de8ad5c61c42d7e903477c00d Mon Sep 17 00:00:00 2001
From: Pepijn de Vos <pepijn.devos@juliacomputing.com>
Date: Thu, 2 Nov 2023 18:39:19 +0100
Subject: [PATCH] Change typeof(x) <: y to x isa y

---
 src/common.jl  | 8 ++++----
 test/common.jl | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/common.jl b/src/common.jl
index 2eb8d2e8b..2a502632b 100644
--- a/src/common.jl
+++ b/src/common.jl
@@ -7,7 +7,7 @@ function solve(
     saveat=eltype(tupType)[], reltol = 1e-5, abstol = 1e-8,
     save_everystep=isempty(saveat),
     dense = save_everystep && isempty(saveat),
-    save_start = save_everystep || isempty(saveat) || typeof(saveat) <: Number ?
+    save_start = save_everystep || isempty(saveat) || saveat isa Number ?
                  true : prob.tspan[1] in saveat,
     callback=nothing,
     dtmin = abs(prob.tspan[2]-prob.tspan[1])/1e-9,
@@ -20,8 +20,8 @@ function solve(
 
     if verbose
         warned = !isempty(kwargs) && check_keywords(alg, kwargs, warnlist)
-        if !(typeof(prob.f) <: DiffEqBase.AbstractParameterizedFunction) &&
-            typeof(alg) <: ode23s
+        if !(prob.f isa DiffEqBase.AbstractParameterizedFunction) &&
+            alg isa ode23s
             if DiffEqBase.has_tgrad(prob.f)
                 @warn("Explicit t-gradient given to this stiff solver is ignored.")
                 warned = true
@@ -49,7 +49,7 @@ function solve(
 
     tspan = prob.tspan
 
-    if typeof(saveat) <: Number
+    if saveat isa Number
       if (tspan[1]:saveat:tspan[end])[end] == tspan[end]
         saveat_vec = convert(Vector{tType},collect(tType,tspan[1]+saveat:saveat:tspan[end]))
       else
diff --git a/test/common.jl b/test/common.jl
index 71a7cf67f..1f6b69307 100644
--- a/test/common.jl
+++ b/test/common.jl
@@ -12,7 +12,7 @@ prob = prob_ode_linear
 
 for alg in algs
     sol =solve(prob,alg;dt=dt,abstol=1e-6,reltol=1e-3)
-    @test typeof(sol[2]) <: Number
+    @test sol[2] isa Number
 end
 
 prob = prob_ode_2Dlinear