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Epsilon User's Manual and Reference
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Epsilon User's Manual and Reference > Variable Reference >

color-look-back: preference variable

Default value: 0

When Epsilon begins coloring in the middle of a buffer, it has to determine whether it's inside a comment by searching back for comment characters. If color-look-back is greater than zero, Epsilon only looks back over that many characters for a block comment delimiter like /* or */ before giving up and concluding that the original text is not inside a comment. If you edit extremely large C files with few block comments, you can speed up Epsilon by setting this variable. Any block comments larger than this value may not be colored correctly. A value of zero (the default) lets Epsilon search as far as it needs to, and correctly colors comments of any size.

More info:

Code Coloring
Code Coloring Internals (Primitives)



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