Crate pdforg_sheets 

pdf-sheets — Spreadsheet engine with formula evaluation, dependency tracking, and virtual viewport rendering.

Re-exports

pub use lexer::*;

pub use parser::*;

pub use evaluator::*;

pub use dep_graph::*;

pub use viewport::*;

Modules

dep_graph

Dependency graph for incremental formula recalculation.

evaluator

Formula evaluator — evaluates Expr ASTs against a sheet context.

functions

Built-in spreadsheet functions (300+ planned, 80+ implemented here).

lexer

Formula lexer — tokenizes formula strings like “=SUM(A1:B10, 3.14)”

parser

Formula parser — converts a token stream into an Expression AST.

viewport

Virtual viewport renderer — computes what the grid should show for a given scroll position.