config/lang/ast: use stringer to generate enums

config/lang/ast/ast.go

@@ -3,6 +3,8 @@ package ast
 // Node is the interface that all AST nodes must implement.
 type Node interface{}
 
+//go:generate stringer -type=Type
+
 // Type is the type of a literal.
 type Type uint
 

config/lang/ast/type_string.go

@@ -0,0 +1,17 @@
+// generated by stringer -type=Type; DO NOT EDIT
+
+package ast
+
+import "fmt"
+
+const _Type_name = "TypeInvalidTypeString"
+
+var _Type_index = [...]uint8{0, 11, 21}
+
+func (i Type) String() string {
+	i -= 1
+	if i+1 >= Type(len(_Type_index)) {
+		return fmt.Sprintf("Type(%d)", i+1)
+	}
+	return _Type_name[_Type_index[i]:_Type_index[i+1]]
+}

config/lang/lex_test.go

@@ -105,11 +105,3 @@ func TestLex(t *testing.T) {
 		}
 	}
 }
-
-/* OTHERS:
-
-foo ${var.foo}
-bar ${"hello"}
-foo ${concat("foo ${var.bar}", var.baz)}
-
-*/