{"id":3304,"date":"2011-04-15T14:56:34","date_gmt":"2011-04-15T19:56:34","guid":{"rendered":"http:\/\/mjtsai.com\/blog\/?p=3304"},"modified":"2011-04-15T14:56:36","modified_gmt":"2011-04-15T19:56:36","slug":"compile-time-tips-and-tricks","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2011\/04\/15\/compile-time-tips-and-tricks\/","title":{"rendered":"Compile-Time Tips and Tricks"},"content":{"rendered":"<p><a href=\"http:\/\/www.mikeash.com\/pyblog\/friday-qa-2011-04-15-compile-time-tips-and-tricks.html\">Mike Ash<\/a>:<\/p>\n<blockquote cite=\"http:\/\/www.mikeash.com\/pyblog\/friday-qa-2011-04-15-compile-time-tips-and-tricks.html\"><p>With a bit of trickery, it&rsquo;s possible to build a check which happens at compile time, late enough so that types are known, but before your program actually runs. There are actually a few different ways to do this, but my preferred way is to declare an array whose size depends on the expression to test. If it passes, set the size to <code>1<\/code>, which compiles. If it fails, set the size to <code>-1<\/code>, which is illegal and causes an error. The error message cannot be fully customized, but by giving the array a descriptive name, the message can still be conveyed.<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>Mike Ash: With a bit of trickery, it&rsquo;s possible to build a check which happens at compile time, late enough so that types are known, but before your program actually runs. There are actually a few different ways to do this, but my preferred way is to declare an array whose size depends on the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"apple_news_api_created_at":"","apple_news_api_id":"","apple_news_api_modified_at":"","apple_news_api_revision":"","apple_news_api_share_url":"","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_is_hidden":false,"apple_news_is_paid":false,"apple_news_is_preview":false,"apple_news_is_sponsored":false,"apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":"\"\"","apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-3304","post","type-post","status-publish","format-standard","hentry","category-programming-category"],"apple_news_notices":[],"_links":{"self":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/3304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/comments?post=3304"}],"version-history":[{"count":1,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/3304\/revisions"}],"predecessor-version":[{"id":3305,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/3304\/revisions\/3305"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=3304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=3304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=3304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}