formualizer-parse

formualizer-parse provides the tokenization, parsing, and pretty-printing infrastructure for the Formualizer spreadsheet engine. It understands both Excel-style and OpenFormula dialects, producing an AST that downstream crates (formualizer-eval, formualizer-workbook, and the language bindings) rely on.

Features

• Tokenization – streaming tokenizer with dialect-aware classification and source location tracking.
• Parser – Pratt-style parser that yields a stable AST and reference model shared with the evaluator.
• Dialects – switch between Excel and OpenFormula syntaxes while defaulting to Excel for backwards compatibility.
• Pretty printing – canonicalize formulas or render diagnostic trees for debugging and tests.

Usage

use formualizer_parse::{FormulaDialect, Tokenizer, canonical_formula};
use formualizer_parse::parser::Parser;
# fn example() -> Result<(), Box<dyn std::error::Error>> {
let tokenizer = Tokenizer::new_with_dialect("=SUM(A1:B3)", FormulaDialect::Excel)?;
let tokens = tokenizer.items;
let mut parser = Parser::new(tokens, false);
let ast = parser.parse()?;
assert_eq!(canonical_formula(&ast), "=SUM(A1:B3)");
#     Ok(())
# }
# example().unwrap();

Tokenizer::new(..) keeps Excel semantics, while Tokenizer::new_with_dialect(.., FormulaDialect::OpenFormula) enables OpenFormula rules.

License

Dual-licensed under MIT or Apache-2.0, at your option.