Method initChecker

cel/env.go:969–1016

()

}

func (e *Env) initChecker() (*checker.Env, error) {
	e.chkOnce.Do(func() {
		chkOpts := []checker.Option{}
		chkOpts = append(chkOpts, e.chkOpts...)
		chkOpts = append(chkOpts,
			checker.CrossTypeNumericComparisons(
				e.HasFeature(featureCrossTypeNumericComparisons)))
		chkOpts = append(chkOpts,
			checker.JSONFieldNames(e.HasFeature(featureJSONFieldNames)))

		if e.parent != nil && e.funcsShared {
			parentChk, err := e.parent.initChecker()
			if err != nil {
				e.setCheckerOrError(nil, err)
				return
			}
			chkOpts = append(chkOpts, checker.ValidatedDeclarations(parentChk))
		}

		ce, err := checker.NewEnv(e.Container, e.provider, chkOpts...)
		if err != nil {
			e.setCheckerOrError(nil, err)
			return
		}
		// Add the statically configured declarations.
		err = ce.AddIdents(e.variables...)
		if err != nil {
			e.setCheckerOrError(nil, err)
			return
		}
		// Add the function declarations which are derived from the FunctionDecl instances.
		if e.parent == nil || !e.funcsShared {
			for _, fn := range e.functions {
				if fn.IsDeclarationDisabled() {
					continue
				}
				err = ce.AddFunctions(fn)
				if err != nil {
					e.setCheckerOrError(nil, err)
					return
				}
			}
		}
		// Add function declarations here separately.
		e.setCheckerOrError(ce, nil)
	})
	return e.getCheckerOrError()
}

// setCheckerOrError sets the checker.Env or error state in a concurrency-safe manner
func (e *Env) setCheckerOrError(chk *checker.Env, chkErr error) {