---
source: crates/aiken-lang/src/parser/expr/anonymous_function.rs
description: "Code:\n\nfn (a: Int) -> Int { a + 1 }"
---
Fn {
    location: 0..28,
    fn_style: Plain,
    arguments: [
        UntypedArg {
            by: ByName(
                Named {
                    name: "a",
                    label: "a",
                    location: 4..5,
                },
            ),
            location: 4..10,
            annotation: Some(
                Constructor {
                    location: 7..10,
                    module: None,
                    name: "Int",
                    arguments: [],
                },
            ),
            doc: None,
            is_validator_param: false,
        },
    ],
    body: BinOp {
        location: 21..26,
        name: AddInt,
        left: Var {
            location: 21..22,
            name: "a",
        },
        right: UInt {
            location: 25..26,
            value: "1",
            base: Decimal {
                numeric_underscore: false,
            },
        },
    },
    return_annotation: Some(
        Constructor {
            location: 15..18,
            module: None,
            name: "Int",
            arguments: [],
        },
    ),
}