Continuing trying to get the simplest bit of real code we could think of to work, we need to finish off less-than-or-equals, and also make let mut wor… ...more

Now we're going to try and get a little code snippet that calculates factorials to work. First up: lexing the <= sign! You can find the source cod… ...more

We are repeating ourselves with the SyntaxTree and TypedSyntaxTree enums. I thought the solution would be too complex, but on reflection it's fine, so… ...more

I spent ages yesterday trying to figure out how to use Rust's tracing library (and tracing-subscriber) for a very simple logging use-case. I wanted to… ...more

Now that we have the types we calculated in our syntax tree, use them to stop faking it in error messages - replace a hard-coded "integer" with the ac… ...more