Add NewLazyLexer and MustNewLazyLexer which accept a function that
returns the rules for the lexer. This allows us to defer the rules
definitions until they're needed.
Lexers in a, g, s, and x packages have been updated to use the new lazy
lexer.
The engine was always passing a string sliced to the current position,
resulting in ^ always matching. Switched to use
FindRunesMatchStartingAt.
Fixes#242.
> If the RegexLexer encounters a newline that is flagged as an error
> token, the stack is emptied and the lexer continues scanning in the
> 'root' state. This can help producing error-tolerant highlighting for
> erroneous input, e.g. when a single-line string is not closed.
Fixes#246.
This commit refactors code from the markdown lexer into the chroma
package, and alters the PostgreSQL and CQL lexers to make use of it.
Additionally, an example markdown with the various sublexers is added.
- Styles now use a builder system, to enforce immutability of styles.
- Corrected and cleaned up how style inheritance works.
- Added a brightening function to colours
- HTML formatter will now automatically pick line and highlight colours
if they are not provided in the style. This is done by slightly
darkening or lightening.
Fixes#21.
This is to solve an issue where writers returned by the Formatter
were often stateful, but this fact was not obvious to the API consumer,
and failed in interesting ways.
