Macro raster 

macro_rules! raster {
    ($expr:expr) => { ... };
    ({ $($stmt:stmt);+ }) => { ... };
}

Build a CompiledProgram from raster-algebra DSL tokens written inline in Rust.

The tokens are stringify!d and then parsed and compiled at run time (not at compile time). The macro expands to an expression of type CompiledProgram, so it must be used in a context where the ? operator can propagate a parse error (i.e. a function returning Result).

Examples

use oxigeo_algorithms::raster;

// Simple NDVI calculation
let ndvi = raster!((NIR - RED) / (NIR + RED));

// Complex multi-band analysis with conditions
let result = raster! {
    let ndvi = (B8 - B4) / (B8 + B4);
    if ndvi > 0.6 then 1 else 0
};