fix v0.7 deprecations

Author: Roger-luo

src/macro.jl

@@ -51,8 +51,15 @@ macro match(ex, lines)
   result = quote
     ex = $(esc(ex))
   end
-  body = foldr((clause, body) -> makeclause(clause..., body),
-               nothing, clauses(lines))
+
+  @static if VERSION < v"0.7.0-"
+    body = foldr((clause, body) -> makeclause(clause..., body),
+                 nothing, clauses(lines))
+  else
+    body = foldr((clause, body) -> makeclause(clause..., body),
+                 clauses(lines); init=nothing)
+  end
+
   push!(result.args, body)
   return result
 end

src/utils.jl

@@ -368,7 +368,11 @@ end
 flatten(ex) = postwalk(flatten1, ex)
 
 function makeif(clauses, els = nothing)
-  foldr((c, ex)->:($(c[1]) ? $(c[2]) : $ex), els, clauses)
+  @static if VERSION < v"0.7.0-"
+    foldr((c, ex)->:($(c[1]) ? $(c[2]) : $ex), els, clauses)
+  else
+    foldr((c, ex)->:($(c[1]) ? $(c[2]) : $ex), clauses; init=els)
+  end
 end
 
 unresolve1(x) = x