Add some docs to stblib Symbol

Author: jderochervlk

runtime/Stdlib_Symbol.res

@@ -3,6 +3,9 @@ type t
 @val external make: string => t = "Symbol"
 @val external getFor: string => t = "Symbol.for"
 @val external keyFor: t => option<string> = "Symbol.keyFor"
+@get
+external description: t => option<string> = "description"
+@send external toString: t => string = "toString"
 
 @val external asyncIterator: t = "Symbol.asyncIterator"
 @val external hasInstance: t = "Symbol.hasInstance"

runtime/Stdlib_Symbol.resi

@@ -0,0 +1,107 @@
+/***
+A built-in object that serves as a namespace for globally-unique identifiers.
+
+Compiles to a regular JavaScript Symbol.
+*/
+
+/**
+Type representing a Symbol.
+*/
+type t
+
+/**
+`make(key)`
+
+Makes a new unique Symbol value.
+
+## Examples
+
+```rescript
+let sym = Symbol.make("foo")
+```
+*/
+@val
+external make: string => t = "Symbol"
+
+/**
+`getFor(key)`
+
+Searches for existing registered Symbols in the global Symbol registry with the given key and returns it if found. 
+Otherwise a new Symbol gets created and registered with key.
+
+## Examples
+
+```rescript
+let sym = Symbol.getFor("foo")
+```
+*/
+@val
+external getFor: string => t = "Symbol.for"
+
+/**
+`keyFor(key)`
+
+Retrieves a shared Symbol key from the global Symbol registry for the given Symbol.
+
+## Examples
+
+```rescript
+let globalSym = Symbol.getFor("sym1") // Global symbol
+
+Console.log(Symbol.keyFor(globalSym))
+// Expected output: "sym1"
+
+let localSym = Symbol.make("sym2") // Local symbol
+
+Console.log(Symbol.keyFor(localSym))
+// Expected output: undefined
+```
+*/
+@val
+external keyFor: t => option<string> = "Symbol.keyFor"
+
+/**
+`description`
+
+Returns `Some(string)` containing the description of this symbol, or `None` if the symbol has no description.
+## Examples
+
+```rescript
+let sym = Symbol.make("foo")
+Console.log(sym->Symbol.description)
+```
+*/
+@get
+external description: t => option<string> = "description"
+
+/**
+`toString`
+
+// Returns a string representing this symbol value.
+
+## Examples
+
+```rescript
+let sym = Symbol.make("foo")
+Console.log(sym->Symbol.toString) 
+// Expected output: "Symbol(foo)"
+```
+*/
+@send
+external toString: t => string = "toString"
+
+@val
+external asyncIterator: t = "Symbol.asyncIterator"
+@val
+external hasInstance: t = "Symbol.hasInstance"
+@val external isConcatSpreadable: t = "Symbol.isConcatSpreadable"
+@val external iterator: t = "Symbol.iterator"
+@val external match: t = "Symbol.match"
+@val external matchAll: t = "Symbol.matchAll"
+@val external replace: t = "Symbol.replace"
+@val external search: t = "Symbol.search"
+@val external species: t = "Symbol.species"
+@val external split: t = "Symbol.split"
+@val external toPrimitive: t = "Symbol.toPrimitive"
+@val external toStringTag: t = "Symbol.toStringTag"
+@val external unscopables: t = "Symbol.unscopables"