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use crate::nodes::InnerNode;
use crate::nodes::InspectVec;
use crate::Loc;
use crate::Node;

#[cfg(feature = "compile-with-external-structures")]
use crate::containers::ExternalPtr;
#[cfg(feature = "compile-with-external-structures")]
type Ptr<T> = ExternalPtr<T>;
#[cfg(not(feature = "compile-with-external-structures"))]
type Ptr<T> = Box<T>;


#[cfg(feature = "compile-with-external-structures")]
use crate::containers::ExternalStringPtr;
#[cfg(feature = "compile-with-external-structures")]
type StringPtr = ExternalStringPtr;
#[cfg(not(feature = "compile-with-external-structures"))]
type StringPtr = String;


/// Represents an optional keyword argument (i.e. `foo` in `def m(foo: 42); end`)
///
#[derive(Debug, Clone, PartialEq)]
#[repr(C)]
pub struct Kwoptarg {
    /// Name of the optional keyword argument
    ///
    pub name: StringPtr,
    /// Default value of the optional keyword argument
    ///
    pub default: Ptr<Node>,
    /// Location of the argument name
    ///
    /// ```text
    /// def m(foo: 1); end
    ///       ~~~
    /// ```
    ///
    pub name_l: Loc,
    /// Location of the argument name
    ///
    /// ```text
    /// def m(foo: 1); end
    ///       ~~~~~~
    /// ```
    ///
    pub expression_l: Loc,
}

impl InnerNode for Kwoptarg {
    fn expression(&self) -> &Loc {
        &self.expression_l
    }

    fn inspected_children(&self, indent: usize) -> Vec<String> {
        let mut result = InspectVec::new(indent);
        result.push_str(&self.name);
        result.push_node(&self.default);
        result.strings()
    }

    fn str_type(&self) -> &'static str {
        "kwoptarg"
    }

    fn print_with_locs(&self) {
        println!("{}", self.inspect(0));
        self.default.inner_ref().print_with_locs();
        self.name_l.print("name");
        self.expression_l.print("expression");
    }
}