code-section : empty (will wait for content), user-provided id

code-section : text content, with language detection (auto)

Currently, C++ trailing-return-type is considered as an illegale synthax by highlight-js
    See the issue here (highlight.js/issues/3673).
    In such case, a fallback detection strategy is then used, but is not likely to be appropriate

• code-section : text content (language detection failure: no syntax highlighting)

• code-section : text content (language detection success)

code-section : text content (large)

code-section : text content + language attribute

code-section : language + code attributes

code-section : url (external code)

• network: unreachable

  ⓘ Note:

  Relevant JS console error:
      [object ace.API.HTMLElements.CodeSection/ace-cs(id=cs_5)].set(url): network error:
          [object ace.details.utility].fetch_resource: bad request status 404 on url [/DOES_NOT_EXISTS]

• network: reachable

• network: reachable, immediatly executed

code-section : language, execution

• compilation success

• compilation error

  ⓘ Note:

  Relevant error status:
          JS:  ace_cs_element.ace_panels.execution.getAttribute('status') === 'failure-compilation'
          CSS: ace-cs > ace-cs-code-mvc[id$='.panels.execution'][status|='failure']

• error : missing configuration (c vs. cpp)

  ⓘ Note:

  Relevant error status:
          JS:  ace_cs_element.ace_panels.panels.right.getAttribute('status') === 'error-compilation'
          CSS: ace-cs > [id$='.panels.right'][status='error']

code-section : language, execution, column orientation

Alternatively, setting the style value style="flex-direction: column" also works

code-section : parsing (render and/or execute only what is relevant for the audience)

code-section : mixing html entities and regular chars (<, >, ", &)

code-section : critical error (no recovery possible)

Such error is quite hard to illustrate with an example.
Mostly likely scenari are either a critical network while calling the Compiler-Explorer API,
or some input code used in conjunction with toggle_parsing="true", which breaks the meta-data parser