oxigdal_algorithms/dsl/
macro_support.rs

1//! Macro support for compile-time DSL
2//!
3//! This module provides the `raster!` macro for compile-time DSL evaluation.
4
5/// Macro for compile-time raster algebra expressions
6///
7/// # Examples
8///
9/// ```ignore
10/// use oxigdal_algorithms::raster;
11///
12/// // Simple NDVI calculation
13/// let ndvi = raster!((NIR - RED) / (NIR + RED));
14///
15/// // Complex multi-band analysis with conditions
16/// let result = raster! {
17///     let ndvi = (B8 - B4) / (B8 + B4);
18///     if ndvi > 0.6 then 1 else 0
19/// };
20/// ```
21#[macro_export]
22macro_rules! raster {
23    // Single expression
24    ($expr:expr) => {{
25        use $crate::dsl::{parse_expression, CompiledProgram};
26        use $crate::dsl::ast::{Program, Statement};
27
28        let expr_str = stringify!($expr);
29        let parsed = parse_expression(expr_str)?;
30        let program = Program {
31            statements: vec![Statement::Expr(Box::new(parsed))],
32        };
33        CompiledProgram::new(program)
34    }};
35
36    // Block with multiple statements
37    ({ $($stmt:stmt);+ }) => {{
38        use $crate::dsl::{parse_program, CompiledProgram};
39
40        let program_str = stringify!({ $($stmt);+ });
41        let parsed = parse_program(program_str)?;
42        CompiledProgram::new(parsed)
43    }};
44}
45
46/// Helper macro for defining custom DSL functions
47///
48/// # Examples
49///
50/// ```ignore
51/// dsl_function! {
52///     fn ndvi(nir, red) = (nir - red) / (nir + red);
53/// }
54/// ```
55#[macro_export]
56macro_rules! dsl_function {
57    (fn $name:ident ( $($param:ident),* ) = $body:expr ;) => {
58        pub fn $name() -> &'static str {
59            concat!(
60                "fn ",
61                stringify!($name),
62                "(",
63                $( stringify!($param), "," ),*
64                ") = ",
65                stringify!($body),
66                ";"
67            )
68        }
69    };
70}
71
72#[cfg(test)]
73mod tests {
74    #[test]
75    fn test_macro_expansion() {
76        // This test just ensures the macros compile
77        // Actual functionality is tested in integration tests
78    }
79}
oxigdal_algorithms/dsl/macro_support.rs

oxigdal_algorithms/dsl/
macro_support.rs
