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by dm_0ney
1796 days ago
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Reasonable question given the usual approach to structure editors, which have users directly modify the AST. tylr adopts a more indirect approach, where your program is presented in an alternate (modal) tile-based syntax with its own syntax-directed editing. The point of this indirection is to give you more text-editor-like flexibility, but unlike text tylr makes sure you can always (in the default mode) transform your program from the tile-based syntax to the abstract syntax. It might help to think of restructuring mode, the mode automatically entered upon constructing `(`, as a transactional editing mode in which you specify your AST-to-AST transformation. |
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