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tree-sitter-delphi13-pure

v1.0.0

Published

Pure Delphi 13 tree-sitter sub-grammar — drops {$IFDEF}/pp_* tokens entirely and expects preprocessor-resolved source as input. Pairs with delphi13-preprocessor to reach 99%+ pass on real Delphi 13 corpora.

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Links

Git

Maintainers

alexanderl2alexanderl2

Keywords

parsertree-sitterdelphidelphi13pascalpure-grammar

Readme

tree-sitter-delphi13-pure

Sub-tree-sitter that parses pure Delphi only — no IFDEF awareness.

Designed to be fed the virtual text output of ../preprocessor/cli.js (or any equivalent preprocessor). All {$IF*} / {$IFDEF} / {$ELSE} / {$ENDIF} / {$I} directives are expected to have been resolved upstream into plain Pascal source.

Differences vs the parent tree-sitter-delphi13 grammar

| Aspect | Parent (master) | Pure | |---|---|---| | pp_block external token | Yes | Dropped | | pp_open / pp_else_tail / pp_end_only externals | Yes | Dropped | | pp_block in type choice | Yes | Dropped | | pp_block in declUses / declRequires | Yes | Dropped | | pp_block in declFieldNoSemi type set | Yes | Dropped | | THEN-wins scanner logic | Yes | Dropped (much smaller scanner) | | pp regex (single-line {$X}) | In extras | In extras (kept — for harmless directives like {$EXTERNALSYM} that don't affect structure) |

Status

Phase 2 scaffold landed (grammar.js stripped of IFDEF-related tokens and rules). Next steps:

  1. Strip THEN-wins scanner code from scanner.c.
  2. Set up binding.gyp / package.json for an independent native binding.
  3. Wire the orchestrator: preprocessor -> pure parse -> source-map rewrite.
  4. Run the orchestrator on the curated corpus and measure.

Why split?

The parent grammar's pp_block machinery and the iter-37+ declFieldNoSemi conflict-cascade family fundamentally limit grammar evolution. Carving out a pure variant removes ~150-200 lines of pp_*-handling, eliminates 4 conflict declarations that were paid taxes on every state, and lets us iterate the core grammar without GLR-cascade risk from IFDEF tokens that the preprocessor has already resolved.