}
		if len(items) > 0 {
			operands = append(operands, items)
			if colon >= 0 && len(operands) == colon+2 {
				// AX:DX becomes DX, AX.
				operands[colon], operands[colon+1] = operands[colon+1], operands[colon]
				colon = -1
			}
		} else if len(operands) > 0 || tok == ',' || colon >= 0 {
			// Had a separator with nothing after.
			p.errorf("missing operand")
		}
	}

pkg go/token, const ARROW = 36
pkg go/token, const ASSIGN = 42
pkg go/token, const BREAK = 61
pkg go/token, const CASE = 62
pkg go/token, const CHAN = 63
pkg go/token, const CHAR = 8
pkg go/token, const COLON = 58
pkg go/token, const COMMA = 52
pkg go/token, const COMMENT = 2
pkg go/token, const CONST = 64
pkg go/token, const CONTINUE = 65
pkg go/token, const DEC = 38
pkg go/token, const DEFAULT = 66

+ The PR title is formatted as follows: `net/http: frob the quux before blarfing`
  + The package name goes before the colon
  + The part after the colon uses the verb tense + phrase that completes the blank in,
    "This change modifies Go to ___________"
  + Lowercase verb after the colon
  + No trailing period
  + Keep the title as short as possible. ideally under 76 characters or shorter
+ No Markdown

pkg go/ast, type InterfaceType struct, Methods *FieldList
pkg go/ast, type KeyValueExpr struct
pkg go/ast, type KeyValueExpr struct, Colon token.Pos
pkg go/ast, type KeyValueExpr struct, Key Expr
pkg go/ast, type KeyValueExpr struct, Value Expr
pkg go/ast, type LabeledStmt struct
pkg go/ast, type LabeledStmt struct, Colon token.Pos
pkg go/ast, type LabeledStmt struct, Label *Ident
pkg go/ast, type LabeledStmt struct, Stmt Stmt