gjurgensen / vscode-cakeml

Basic syntax highlighting for CakeML.

Issues and limitations

Multi-line declarations

Multi-line declarations may fail to parse. For instance:

fun 
  foo x = 
  x

Here, foo and x are not recognized as a function name and parameter, as they would in a single-line declaration. This is a fundamental limitation of the TextMate regex engine, which only matches against one line at a time.

Tuple binders in val / datatype declarations

The following statement:

val (a, b, c) = foo

fails to parse correctly, because the grammar cannot handle variable-length tuples. While the corresponding regex matches fine, only the last of the repeated capture group within the tuple is correctly assigned a token name.