Merge pull request #90 from jverzani/invokelatest

call invokelatest in lambdify

REQUIRE

@@ -1,5 +1,5 @@
 julia 0.4
-Compat 0.9.5
+Compat 0.25.0
 RecipesBase 0.0.6
 BinDeps 0.4.0
 Conda 0.4.0

src/SymEngine.jl

@@ -3,7 +3,7 @@ __precompile__()
 module SymEngine
 
 import Base: show, convert, real, imag
-import Compat: String, unsafe_string, @compat, denominator, numerator
+import Compat: String, unsafe_string, @compat, denominator, numerator, invokelatest
 
 export Basic, symbols, @vars
 export free_symbols, get_args

src/subs.jl

@@ -107,9 +107,10 @@ function _lambdify(ex::Basic, vars)
     body = walk_expression(ex)
 
     try
-        eval(Expr(:function,
+        fn = eval(Expr(:function,
                   Expr(:call, gensym(), map(Symbol,vars)...),
-                  body))
+                       body))
+        (args...) -> invokelatest(fn, args...) # https://github.com/JuliaLang/julia/pull/19784
     catch err
         throw(ArgumentError("Expression does not lambdify"))
     end

test/runtests.jl

@@ -114,6 +114,7 @@ for val in samples
     fn = lambdify(ex)
     @test norm(fn(val) - sin(2*val)) <= 1e-14
 end
+@test lambdify(x^2)(3) == 9
 
 ## N
 for val in samples