๐Ÿ“Code highlighting can carry more information

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Syntax highlighting is a waste of an information channel

Code is a huge channel for helping people understand information, draw attention, etc.

Currently, code highlighting is only used to highlight syntax. Which doesnโ€™t carry much information. (I believe highlighting keywords only would usually be enough.)

However, there are a lot more things that could leverage a color.

Examples:

  • types (all variables of the same type would be of the same color)
  • locals (local variables/function arguments are highlighted)
  • tests (highlight functions that were called in the failed test)
  • version control (highlight code that was introduced by team member)
  • exceptions (highlight functions that throw exceptions)
  • effects (highlight functions that do specific effects IO/etc)

These are much harder than usual syntax highlighting (which can be usually done with simple regex).

Projectional Editors can do these easier as they have access to the AST.

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