std: survey and reduce untyped usage (1066 → 1025)

[Copilot]

Browsed std/ for all 1066 untyped occurrences, categorized them, and eliminated 41 that were genuinely unnecessary.

Categories found

Category	Count	Removable?
Magic compiler identifiers (__define_feature__, __feature__, __resources__)	~35	No — compiler built-ins
Platform inline code injection (__lua__, __dollar__, __global__, __lock__, etc.)	~300	No — platform magic
Compiler-generated runtime metadata (__class__, __enum__, __name__, _hx_index, etc.)	~154	Mostly no
Platform-specific internal representations (.__s, .cca(), __unsafe_get, etc.)	~200	No — intrinsic to target
untyped { } blocks	~142	Mostly no; some redundant nesting
Dynamic field/index access	~50	Some — see fixes
Bare global function calls	~50	JS ones — see fixes
Constructor access bypass	~20	Yes — use @:privateAccess
Private method access	~10	Yes — use @:access(Class)

Changes made

JS global functions → js.Lib.global.*

untyped console, untyped setTimeout, untyped setInterval, untyped clearInterval, untyped encodeURIComponent, untyped decodeURIComponent replaced with js.Lib.global.* calls in Log.hx, Timer.hx, EntryPoint.hx, StringTools.hx.

Dynamic field access → typed alternatives

• untyped this[key] / untyped this[key] = value in DynamicAccess.hx → js.Syntax.code("{0}[{1}]", ...)
• untyped obj.__id__ / untyped h[id] in ObjectMap.hx (JS) → js.Syntax.code
• untyped t.__meta__ in Meta.hx → t.__meta__ (t is already Dynamic)
• untyped o.toString inside outer untyped {} in Boot.hx (JS) → redundant untyped removed
• untyped s == null ? "null" : s.toString() in Std.hx (CPP) → direct call on Dynamic
• untyped Array.prototype.slice.call(...) in Reflect.hx (JS) → js.Syntax.code("Array.prototype.slice.call(arguments)")
• untyped js.Lib.document.selection.createRange() in Selection.hx → (js.Lib.document : Dynamic).selection...
• untyped d.toGMTString() in Cookie.hx → (d : Dynamic).toGMTString()

Constructor access → @:privateAccess

untyped new FileInput/FileOutput(...) in cpp/_std/sys/io/File.hx, php/_std/sys/io/File.hx, neko/_std/Sys.hx replaced with @:privateAccess new.

Private method access → @:access

untyped lua.Boot.__instanceof(v, t) and untyped neko.Boot.__instanceof(v, t) in Std.hx replaced with @:access(lua.Boot) / @:access(neko.Boot) annotations (consistent with how JS already does @:privateAccess js.Boot.__instanceof).

JVM typed casts

untyped s.hashCode() / untyped k.equals(get()) in WeakMap.hx replaced with (cast s : java.lang.Object).hashCode() etc.

Misc

• untyped cur.substring(...) in JVM EReg.hx (String.substring is standard — untyped was just historical baggage)
• untyped Math.imul in Int32.hx → (cast Math : Dynamic).imul with if/else for clarity
• untyped { } wrapper in ArrayBuffer.hx IE10 polyfill removed (body only uses js.Syntax.code)
• untyped x <= 0 ? 0 : Math.floor(...) in Lua Std.random → typed (both branches are Int)

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