handler

Documentation

Overview

Package handler provides a handler interface.

Index

• type Handler
  • func New(parse Parser, run Runner) Handler
• type Parser
• type Runner
  • func FieldRunner(f func(reflect.Value, reflect.StructField, any) error) Runner
  • func SimpleRunner(f func(field reflect.Value, arg any) error) Runner
  • func (f Runner) Parse(s string) (any, error)
  • func (f Runner) Run(ctx any, r, v reflect.Value, t reflect.StructField, arg any) error

Types

type Handler

type Handler interface {
	Parse(string) (any, error) // Used to optimize: pre-parse and cache the tag value.
	Run(ctx any, rootStructValue, fieldValue reflect.Value, fieldType reflect.StructField, arg any) error
}

Handler is an interface to handle the struct field.

func New

func New(parse Parser, run Runner) Handler

New returns a new Handler from the parse and run functions.

parse may be nil, but run must not be nil.

type Parser

type Parser func(string) (any, error)

Parser is the function to pre-parse the field tag value.

type Runner

type Runner func(ctx any, root reflect.Value, vf reflect.Value, sf reflect.StructField, arg any) error

Runner is the function to handle the struct field.

func FieldRunner

func FieldRunner(f func(reflect.Value, reflect.StructField, any) error) Runner

FieldRunner converts a field value function to Runner.

func SimpleRunner

func SimpleRunner(f func(field reflect.Value, arg any) error) Runner

SimpleRunner converts a simple function to Runner.

func (Runner) Parse

func (f Runner) Parse(s string) (any, error)

Parse implements the interface Handler, which does nothing and returns the original string input as the parsed result.

func (Runner) Run

func (f Runner) Run(ctx any, r, v reflect.Value, t reflect.StructField, arg any) error

Run implements the interface Handler.