auto_lsp_core/
utils.rs

1/// Calls a method on the first node that matches any of the provided types.
2/// Returns the result of the method call.
3///
4/// # Example
5///
6/// ```rust, ignore
7/// use ast::generated::{FunctionDefinition, ClassDefinition};
8/// use auto_lsp::dispatch_once;
9///
10/// /* ... */
11/// let result = dispatch_once!(node.lower(), [
12///     FunctionDefinition => return_something(db, param),
13///     ClassDefinition => return_something(db, param)
14/// ]);
15/// ```
16#[macro_export]
17macro_rules! dispatch_once {
18    ($node:expr, [$($ty:ty => $method:ident($($param:expr),*)),*]) => {
19        $(
20            if let Some(n) = $node.downcast_ref::<$ty>() {
21                return n.$method($($param),*);
22            };
23        )*
24    };
25}
26
27/// Calls a method on any node that matches any of the provided types.
28/// Unlike dispatch_once, it will not return.
29///
30/// # Example
31///
32/// ```rust, ignore
33/// use ast::generated::{FunctionDefinition, ClassDefinition};
34/// use auto_lsp::dispatch;
35///
36/// /* ... */
37/// dispatch!(node.lower(), [
38///     FunctionDefinition => get_something(db, param),
39///     ClassDefinition => get_something(db, param)
40/// ]);
41/// ```
42#[macro_export]
43macro_rules! dispatch {
44    ($node:expr, [$($ty:ty => $method:ident($($param:expr),*)),*]) => {
45        $(
46            if let Some(n) = $node.downcast_ref::<$ty>() {
47                n.$method($($param),*)?;
48            };
49        )*
50    };
51}
auto_lsp_core/utils.rs

auto_lsp_core/
utils.rs
