Update 'Style Guide'

Style-Guide.md

@@ -16,6 +16,43 @@ For example:
 func Parse (modulePath string) (tree *SyntaxTree, err error) {
 ```
 
+Documenting struct member variables and enum values is also a very good idea:
+
+```
+// TypeKind represents what kind of type a type is
+type TypeKind int
+
+const (
+	// TypeKindBasic either means it's a primitive, or it inherits from
+	// something.
+	TypeKindBasic TypeKind = iota
+
+	// TypeKindPointer means it's a pointer
+	TypeKindPointer
+
+	// TypeKindArray means it's an array.
+	TypeKindArray
+)
+
+// Type represents a type specifier
+type Type struct {
+	location file.Location
+
+	mutable bool
+	kind TypeKind
+
+	// only applicable for arrays. a value of zero means it has an
+	// undefined/dynamic length.
+	length uint64
+
+	// only applicable for basic.
+        name Identifier
+
+	// not applicable for basic.
+	points *Type
+}
+```
+
 ## Inline Comments
 
 Comments within the actual code are generally all lowercase, and do not end with a period. They should provide a high level description of what code is doing. This goes without saying, but be sure to include a good amount of these, as other people *will* read your code.
@@ -103,4 +140,20 @@ func someFunc(
 
 Obviously, these examples have been condensed way below 80 columns for dramatic effect, but you get the idea.
 
-Other stylistic choices don't matter as much, since all of the code will be gofmt'd at some point. It is, however, a good idea to adopt the gofmt style at least to some degree, so your code will look similar before and after.
+Other stylistic choices don't matter as much, since all of the code will be gofmt'd at some point. It is, however, a good idea to adopt the gofmt style at least to some degree, so your code will look similar before and after.
+
+# "Enums"
+
+Go does not have support for enums, but you can still make things that are effectively enums. This is done by creating a new type with the desired name, and basing it off of an `int` primitive, then definind a `const` block of pre-defined values for it.
+
+```
+type Color int
+
+const (
+	ColorRed = iota
+	ColorBlue
+	ColorGreen
+)
+```
+
+All enum values the ARF compiler are prefixed with the name of the enum they belong to, as shown above.