Use Expr instead of Meta.parse

Author: rikhuijzer

src/rule.jl

@@ -156,7 +156,7 @@ function rewrite_rhs(expr::Expr)
     if expr.head == :where
         rhs = expr.args[1]
         predicate = expr.args[2]
-        expr = Meta.parse("$predicate ? $rhs : nothing")
+        expr = :($predicate ? $rhs : nothing)
     end
     return expr
 end

test/rulesets.jl

@@ -133,7 +133,7 @@ end
 end
 
 @testset "where" begin
-    expected = Meta.parse("f(~x) ? ~x + ~y : nothing")
+    expected = :(f(~x) ? ~x + ~y : nothing)
     @test SymbolicUtils.rewrite_rhs(:((~x + ~y) where f(~x))) == expected
 
     @syms a b