expr

Documentation

Index

• func Coalesce() cel.EnvOption
• func Compile(source string) (cel.Program, error)
• func Eval[ReturnType any](ctx context.Context, prg cel.Program, scope map[string]any) (result ReturnType, err error)
• func First() cel.EnvOption
• func Pluck() cel.EnvOption
• func Stdlib() cel.EnvOption
• func TrimPrefix() cel.EnvOption

Functions

func Coalesce

func Coalesce() cel.EnvOption

Coalesce removes all null values from a list.

func Compile

func Compile(source string) (cel.Program, error)

Compile takes a CEL expression and compiles it with the standard environment. We don't have anything in the standard environment just yet, but this ensures we instantiate the CEL VM consistently, wherever we might use it.

func Eval

func Eval[ReturnType any](ctx context.Context, prg cel.Program, scope map[string]any) (result ReturnType, err error)

Eval evaluates the given program against the scope, returning a value that matches the type requested via the generic ReturnType parameter.

func First

func First() cel.EnvOption

First returns the first value of a list element, if it exists.

func Pluck

func Pluck() cel.EnvOption

Pluck is a function that given a list of object, will map over those objects and return the values at the provided key.

func Stdlib

func Stdlib() cel.EnvOption

Stdlib adds importer specific library functions to the CEL runtime.

func TrimPrefix

func TrimPrefix() cel.EnvOption

TrimPrefix removes the given string from the front of the input.