Lexer failing: Matched the empty string ( id 32)
auyer opened this issue · comments
When running the examples, I get the empty String error, although it was suposed to be cautght by the ( |\t|\n) regex
In multiple Runs, this is the results:
> lexing ex/ex1.x
panic: Lexer error: matched the empty string at 0:0 (tc=62) for match id 32.
> lexing ex/ex2.x
panic: Lexer error: matched the empty string at 0:0 (tc=106) for match id 32.
> lexing ex/ex3.x
panic: Lexer error: matched the empty string at 0:0 (tc=195) for match id 32.
go run main.go ex/ex4.x
> lexing ex/ex4.x
panic: Lexer error: matched the empty string at 0:0 (tc=17) for match id 32.
> lexing ex/ex5.x
panic: Lexer error: matched the empty string at 0:0 (tc=261) for match id 32.
> lexing ex/fib.x
panic: Lexer error: matched the empty string at 0:0 (tc=702) for match id 32.
I am investigating, but I am also still learning the inner workings of this code . I do not guarantee to find the issue.
What is your version of lexmachine that you are using? lexmachine should not compile the lexer if it is able to match the empty string (this was a recent change).
Note: I haven't touched tcels code in around 4 years. I like the syntax that I had developed but I doubt I will do anything much with it at this point.
I am using the latest version ( Git HEAD) of lexmachine.
The problem was solved in PR #3
I understand you don't plan to keep updating this repository, but I plan to understand this project completely, and fork it to create a educational compiler.