rohitpaulk / interpreter-poc

Follows the book https://craftinginterpreters.com/.

Chapters to test names: https://github.com/munificent/craftinginterpreters/blob/01e6f5b8f3e5dfa65674c2f9cf4700d73ab41cf8/tool/bin/test.dart#L599

Stage #1. Scanning: Empty file

(instructions for this are already in the repository)

Stage #2. Scanning: Parentheses

(instructions for this are already in the repository)

Stage #3. Scanning: Braces

https://craftinginterpreters.com/scanning.html#recognizing-lexemes

Same as above, add braces into the mix.

Stage #4. Scanning: Other single-character tokens

https://craftinginterpreters.com/scanning.html#recognizing-lexemes

,, ., -, +, ;, *.

/ is not covered here, it'll be covered in later stages.

Stage #5. Scanning: Lexical errors

https://craftinginterpreters.com/scanning.html#lexical-errors

,.$(#

Expected output:

COMMA , null
DOT . null
[line 1] Error: Unexpected character.
LEFT_PAREN ( null
[line 1] Error: Unexpected character.

Tester implementation notes:

• Errors must be printed to stderr. The ordering compared to other statements doesn't matter.
• Test errors first, and test stdout tokens after.
• For errors, only test against lines that start with [line <digit>]. That way the user can still add other debug statements and not mess with our output. Also compare line-by-line, so that the diffs are easy to parse.
• Test exit code too!

Stage #6: Scanning: Assignment & equality Operators

https://craftinginterpreters.com/scanning.html#operators

=, ==.

Stage #7: Scanning: Negation & inequality operators

https://craftinginterpreters.com/scanning.html#operators

! && !=.

Stage #8: Scanning: Relational operators

https://craftinginterpreters.com/scanning.html#operators

<, >, <=, >=.

Stage 9: Scanning: Division operator & comments

https://craftinginterpreters.com/scanning.html#longer-lexemes

Stage #10. Scanning: Whitespace

https://craftinginterpreters.com/scanning.html#longer-lexemes

Stage #11. Scanning: Multi-line errors

Now that whitespace is implemented, we can test whether line counting actually works for errors.

Stage #12. Scanning: String literals

https://craftinginterpreters.com/scanning.html#string-literals

"hello"

Stage #13. Scanning: Number literals

https://craftinginterpreters.com/scanning.html#number-literals

123, 123.123 etc.

Stage #14. Scanning: Identifiers

https://craftinginterpreters.com/scanning.html#reserved-words-and-identifiers

abcd, foo, bar etc.

Stage #15. Scanning: Reserved words

https://craftinginterpreters.com/scanning.html#reserved-words-and-identifiers

or, if etc.