Define MethodInfoKey

Author: serenity4

src/CodeTracking.jl

@@ -34,7 +34,10 @@ include("utils.jl")
 #   - a list of `(lnn,ex)` pairs. In almost all cases there will be just one of these,
 #     but "mistakes" in moving methods from one file to another can result in more than
 #     one definition. The last pair in the list is the currently-active definition.
-const method_info = IdDict{Pair{Union{Nothing, MethodTable}, Type},Union{Missing,Vector{Tuple{LineNumberNode,Expr}}}}()
+
+const MethodInfoKey = Pair{Union{Nothing, MethodTable}, Type}
+
+const method_info = IdDict{MethodInfoKey,Union{Missing,Vector{Tuple{LineNumberNode,Expr}}}}()
 
 const _pkgfiles = Dict{PkgId,PkgFiles}()
 
@@ -59,7 +62,7 @@ const juliabase = joinpath("julia", "base")
 const juliastdlib = joinpath("julia", "stdlib", "v$(VERSION.major).$(VERSION.minor)")
 
 method_table(method::Method) = isdefined(method, :external_mt) ? method.external_mt::MethodTable : nothing
-method_info_key(method::Method) = Pair{Union{Nothing, MethodTable}, Type}(method_table(method), method.sig)
+MethodInfoKey(method::Method) = MethodInfoKey(method_table(method), method.sig)
 
 ### Public API
 
@@ -73,13 +76,13 @@ the method declaration, otherwise it is the first line of the method's body.
 function whereis(method::Method)
     file, line = String(method.file), method.line
     startswith(file, "REPL[") && return file, line
-    lin = get(method_info, method_info_key(method), nothing)
+    lin = get(method_info, MethodInfoKey(method), nothing)
     if lin === nothing
         f = method_lookup_callback[]
         if f !== nothing
             try
                 Base.invokelatest(f, method)
-                lin = get(method_info, method_info_key(method), nothing)
+                lin = get(method_info, MethodInfoKey(method), nothing)
             catch
             end
         end
@@ -301,13 +304,13 @@ See also [`code_expr`](@ref).
 """
 function definition(::Type{Expr}, method::Method)
     file = String(method.file)
-    def = startswith(file, "REPL[") ? nothing : get(method_info, method_info_key(method), nothing)
+    def = startswith(file, "REPL[") ? nothing : get(method_info, MethodInfoKey(method), nothing)
     if def === nothing
         f = method_lookup_callback[]
         if f !== nothing
             try
                 Base.invokelatest(f, method)
-                def = get(method_info, method_info_key(method), nothing)
+                def = get(method_info, MethodInfoKey(method), nothing)
             catch
             end
         end