go: Add if statement parsing and evaluation #21
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Visit the preview URL for this PR (updated for commit d19c380): https://evy-lang--pr21-if-z6wg59s0.web.app (expires Fri, 23 Sep 2022 06:28:31 GMT) 🔥 via Firebase Hosting GitHub Action 🌎 |
camh-
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Sep 15, 2022
Update output for end of line for readability from `<end of line>` to simply `end of line`. In the context of error messages the latter seems to read nicer.
juliaogris
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Parse `if` statements into If AST node. While at it, abstract the way we create block statements with a configurable set of terminating tokens. `else` for example is terminating for if statements, but not for function bodies, else bodies or loop bodies. Also update block statement parsing, to NOT parse past the END token so we can read and validate the block end token from the call site.
Add if statement evaluation to evaluator. Add bool constants TRUE, FALSE for easier comparison. Update index.html in frontend for code that evaluates, we don't yet parse and evaluate expressions.
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Add if statement parsing and evaluation - this is a pretty straight
forward PR, with only minor refactors around BlockStatment parsing and
bool constants during evaluation.