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use source_map::Span;
use crate::{ASTNode, TSXToken, TypeDeclaration, TypeId, TypeReference};
#[derive(Debug, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "self-rust-tokenize", derive(self_rust_tokenize::SelfRustTokenize))]
pub struct TypeAlias {
pub type_name: TypeDeclaration,
pub type_expression: TypeReference,
pub type_id: TypeId,
position: Span,
}
impl ASTNode for TypeAlias {
fn get_position(&self) -> std::borrow::Cow<Span> {
std::borrow::Cow::Borrowed(&self.position)
}
fn from_reader(
reader: &mut impl tokenizer_lib::TokenReader<TSXToken, Span>,
state: &mut crate::ParsingState,
settings: &crate::ParseSettings,
) -> crate::ParseResult<Self> {
let start = reader.expect_next(TSXToken::Keyword(crate::TSXKeyword::Type))?;
let type_name = TypeDeclaration::from_reader(reader, state, settings)?;
reader.expect_next(TSXToken::Assign)?;
let type_expression = TypeReference::from_reader(reader, state, settings)?;
let position = start.union(&type_expression.get_position());
Ok(Self { type_name, type_expression, type_id: TypeId::new(), position })
}
fn to_string_from_buffer<T: source_map::ToString>(
&self,
buf: &mut T,
settings: &crate::ToStringSettingsAndData,
depth: u8,
) {
if settings.0.include_types {
buf.push_str("type ");
self.type_name.to_string_from_buffer(buf, settings, depth);
buf.push_str(" = ");
self.type_expression.to_string_from_buffer(buf, settings, depth);
}
}
}