The road to intellij-elixir 1.0.0
summary
Porting Elixir's yecc/YAK grammar into JetBrains' Grammar-Kit plus a JFlex lexer forces concrete tradeoffs: interpolation requires a manual pushdown stack in Java because JFlex is finite‑state, Pratt parsing (Grammar‑Kit) handles no‑parentheses calls and operator associativity, and a year of work produces intellij‑elixir v1.0.0. Tests use Elixir and JInterface quotes vs PSI comparison to validate trees and uncover edge cases — the effort found three bugs in native Elixir and yields a working IntelliJ plugin.
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chapters (17)
- 0:00Introduction
- 1:09Plugin motivation
- 3:23Parsing and grammar kit
- 6:27Implementing features
- 9:35Lexing and interpolation
- 12:24Stack management
- 16:04Operator associativity
- 20:14Pratt parsing
- 24:20Parsing expressions
- 27:54Function calls
- 30:59Grammar recursion
- 35:35Testing with JInterface
- 38:45Tokenizing bugs
- 42:09Stab expressions
- 45:53Do blocks
- 48:52Final tests and bugs
- 52:38Conclusion
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