return
	}

	for _, exp := range f.ExpFunc {
		if exp.Func.Name.Name == n.Name.Name {
			exp.Func = n
			break
		}
	}
}

type astContext int

const (
	ctxProg astContext = iota
	ctxEmbedType
	ctxType
	ctxStmt
	ctxExpr
	ctxField
	ctxParam
	ctxAssign2 // assignment of a single expression to two variables
	ctxSwitch
	ctxTypeSwitch
	ctxFile
	ctxDecl
	ctxSpec

		Value Expr
	}
)

// The direction of a channel type is indicated by a bit
// mask including one or both of the following constants.
type ChanDir int

const (
	SEND ChanDir = 1 << iota
	RECV
)

// A type is represented by a tree consisting of one
// or more of the following type-specific expression
// nodes.
type (
	// An ArrayType node represents an array or slice type.

// unnecessary parentheses when printing expressions in the LLVM style.
type precedence int

// The precedence values, in order from high to low.
const (
	precPrimary precedence = iota
	precPostfix
	precUnary
	precCast
	precPtrMem
	precMul
	precAdd
	precShift
	precSpaceship
	precRel
	precEqual
	precAnd
	precXor
	precOr
	precLogicalAnd
	precLogicalOr