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//! Different variants of an `Item` in our intermediate representation.
use super::context::BindgenContext;
use super::dot::DotAttributes;
use super::function::Function;
use super::module::Module;
use super::ty::Type;
use super::var::Var;
use std::io;
/// A item we parse and translate.
#[derive(Debug)]
pub(crate) enum ItemKind {
/// A module, created implicitly once (the root module), or via C++
/// namespaces.
Module(Module),
/// A type declared in any of the multiple ways it can be declared.
Type(Type),
/// A function or method declaration.
Function(Function),
/// A variable declaration, most likely a static.
Var(Var),
}
impl ItemKind {
/// Get a reference to this `ItemKind`'s underying `Module`, or `None` if it
/// is some other kind.
pub(crate) fn as_module(&self) -> Option<&Module> {
match *self {
ItemKind::Module(ref module) => Some(module),
_ => None,
}
}
/// Transform our `ItemKind` into a string.
pub(crate) fn kind_name(&self) -> &'static str {
match *self {
ItemKind::Module(..) => "Module",
ItemKind::Type(..) => "Type",
ItemKind::Function(..) => "Function",
ItemKind::Var(..) => "Var",
}
}
/// Is this a module?
pub(crate) fn is_module(&self) -> bool {
self.as_module().is_some()
}
/// Get a reference to this `ItemKind`'s underying `Function`, or `None` if
/// it is some other kind.
pub(crate) fn as_function(&self) -> Option<&Function> {
match *self {
ItemKind::Function(ref func) => Some(func),
_ => None,
}
}
/// Is this a function?
pub(crate) fn is_function(&self) -> bool {
self.as_function().is_some()
}
/// Get a reference to this `ItemKind`'s underying `Function`, or panic if
/// it is some other kind.
pub(crate) fn expect_function(&self) -> &Function {
self.as_function().expect("Not a function")
}
/// Get a reference to this `ItemKind`'s underying `Type`, or `None` if
/// it is some other kind.
pub(crate) fn as_type(&self) -> Option<&Type> {
match *self {
ItemKind::Type(ref ty) => Some(ty),
_ => None,
}
}
/// Get a mutable reference to this `ItemKind`'s underying `Type`, or `None`
/// if it is some other kind.
pub(crate) fn as_type_mut(&mut self) -> Option<&mut Type> {
match *self {
ItemKind::Type(ref mut ty) => Some(ty),
_ => None,
}
}
/// Is this a type?
pub(crate) fn is_type(&self) -> bool {
self.as_type().is_some()
}
/// Get a reference to this `ItemKind`'s underying `Type`, or panic if it is
/// some other kind.
pub(crate) fn expect_type(&self) -> &Type {
self.as_type().expect("Not a type")
}
/// Get a reference to this `ItemKind`'s underying `Var`, or `None` if it is
/// some other kind.
pub(crate) fn as_var(&self) -> Option<&Var> {
match *self {
ItemKind::Var(ref v) => Some(v),
_ => None,
}
}
/// Is this a variable?
pub(crate) fn is_var(&self) -> bool {
self.as_var().is_some()
}
}
impl DotAttributes for ItemKind {
fn dot_attributes<W>(
&self,
ctx: &BindgenContext,
out: &mut W,
) -> io::Result<()>
where
W: io::Write,
{
writeln!(out, "<tr><td>kind</td><td>{}</td></tr>", self.kind_name())?;
match *self {
ItemKind::Module(ref module) => module.dot_attributes(ctx, out),
ItemKind::Type(ref ty) => ty.dot_attributes(ctx, out),
ItemKind::Function(ref func) => func.dot_attributes(ctx, out),
ItemKind::Var(ref var) => var.dot_attributes(ctx, out),
}
}
}
|
