edit

Documentation

Index

• func Option(node ast.Node, optionIdentifier string, fn OptionFn) (bool, error)
• type OptionFn
  • func OptionObjectFn(keyMap map[string]ast.Expression) OptionFn
  • func OptionValueFn(expr ast.Expression) OptionFn

Functions

func Option

func Option(node ast.Node, optionIdentifier string, fn OptionFn) (bool, error)

`Option` passes the `OptionStatement` in the AST rooted at `node` that has the specified identifier to `fn`. The function can have side effects on the option statement and/or return a non-nil `Expression` that is set as value for the option. If the value returned by the edit function is `nil` (or an error is returned) no new value is set for the option statement (but any, maybe partial, side effect is applied). `Option` returns whether it could find and edit the option (possibly with errors) or not.

Types

type OptionFn

type OptionFn func(opt *ast.OptionStatement) (ast.Expression, error)

`OptionFn` is a function that, provided with an `OptionStatement`, returns an `Expression` or an error. It is used by `Option` functions to edit AST's options statements.

func OptionObjectFn

func OptionObjectFn(keyMap map[string]ast.Expression) OptionFn

Creates an `OptionFn` for updating the values of an `OptionStatement` that has an `ObjectExpression` as value. Returns error if the child of the option statement is not an object expression, or if some key in the provided map is not a property of the object.

func OptionValueFn

func OptionValueFn(expr ast.Expression) OptionFn

Creates an `OptionFn` for setting the value of an `OptionStatement`.