haskell - Why does Text.Show.Functions only return <function>? -


the standard package show functions returns constant string:

λ> :m +text.show.functions  λ> show (+1) "<function>"

ghci's :type command more useful:

λ> :t (+1) (+1) :: num => ->

is impossible such level of detail @ runtime? compilation process leave kind of information @ functions, except them being functions?

not same level of details, can use typeof data.typeable:

prelude> import data.typeable prelude data.typeable> typeof (+1) integer -> integer

-

Comments

Post a Comment

Popular posts from this blog

cookies - Yii2 Advanced - Share session between frontend and mainsite (duplicate of frontend for www) -

i have custom members system have made: yii2 members system . can refer full details, or install can work question. i have frontend , backend yii2 provides, few modifications separate sessions/cookies backend works admin model , pulls admin table. similar old traditional member systems. mainsite clone of frontend , it's role main website. when go www.site.com or site.com . here 3 apps , example domains: mainsite = www.site.com or site.com frontend = users.site.com backend = admin.site.com when user logs in ( users.site.com/site/login ) , go homepage ( mainsite @ www.site.com ) want know logged in , show username. how frontend operates default advanced app. from have far, login , head mainsite , reads an internal server error occurred. . doesn't yii error, server error? when in yii logs under runtime, mentions access control: 2017-04-14 13:38:25 [127.0.0.1][1][-][error][yii\web\httpexception:403] exception 'yii\web\forbiddenhttpexception'...
Read more

angular - password and confirm password field validation angular2 reactive forms -

i need check whether password , confirm password fields have same value using reactive form angular2. did see lot of answers on same here, angular 2 form validating repeat password , comparing fields in validator angular2 , none seemed work me.can please help."this" undefined in validate function :( . sharing code, this.addedituserform = this.builder.group({ firstname: ['', validators.required], lastname: ['', validators.required], title: ['', validators.required], email: ['', validators.required], password: ['', validators.required], confirmpass: ['', [validators.required, this.validatepasswordconfirmation]] }); validatepasswordconfirmation(group: formgroup): any{ let valid = true; // if (this.addedituserform.controls.password != this.addedituserform.controls.confirmpass) { // valid = false; // this.add...
Read more

php - Permission denied. Laravel linux server -

when try register , send email user got error. working till yesterday. today gives me , cant figure out why. way on local testing work's. i'm stuck. please errorexception in compiled.php line 7512: file_put_contents(/var/www/html/storage/framework/views/53de219dee4f11a2db4f64a2c574ad02db5613f4.php): failed open stream: permission denied in compiled.php line 7512 @ handleexceptions->handleerror('2', 'file_put_contents(/var/www/html/storage/framework/views/53de219dee4f11a2db4f64a2c574ad02db5613f4.php): failed open stream: permission denied', '/var/www/html/bootstrap/cache/compiled.php', '7512', array('path' => '/var/www/html/storage/framework/views/53de219dee4f11a2db4f64a2c574ad02db5613f4.php', 'contents' => 'please activate account clicking on following link. <a href="<?php echo e(route('auth.activate', $token)); ?>"><?php echo e(route('auth.activate', $token)); ?...
Read more