Crate mexprp

MEXPRP

A math expression parsing and evaluating library

Usage

The recommended way to use it is with the Expression struct, but it can also be used for one-off usages with the eval() and eval_ctx() functions in the root. Expressions can be parsed without a context and will use the default one, but in order to use custom constants and functions, Expressions need to be parsed AND evaluated with the context you wish to use.

Evaluating an expression

mexprp::eval("10 / (2 + 3)"); // Ok(2.0)

Compiling an expression

let expr = Expression::parse("3 ^ 4 / 9").unwrap();
let res = expr.eval(); // Ok(9.0)

Re-exports

pub use func::Func;

pub use expr::Calculation;

pub use expr::Expression;

pub use expr::Term;

pub use context::Context;

Modules

context	Context struct
errors	All the errors
expr	Contains expressions and terms
func	Contains Function trait
op	Contains definitions for Operations
opers	Contains implementations for operations
parse	Contains methods for parsing equations into token representations

Functions

eval	Parse and evaluate a string
eval_ctx	Parse and evaluate a string with the given context