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use common::ElementFormat; use errors::*; use super::variable::Variable; #[derive(Debug, Clone)] pub enum Name { Imported(ImportedName), BuiltIn(BuiltInName), Local(LocalName), } impl Name { pub fn imported(module: &str, name: &str) -> ImportedName { ImportedName { module: module.to_owned(), name: name.to_owned(), alias: None, } } pub fn imported_alias(module: &str, name: &str, alias: &str) -> ImportedName { ImportedName { module: module.to_owned(), name: name.to_owned(), alias: Some(alias.to_owned()), } } pub fn built_in(name: &str) -> BuiltInName { BuiltInName { name: name.to_owned() } } pub fn local(name: &str) -> LocalName { LocalName { name: name.to_owned() } } pub fn format<E>(&self, out: &mut E) -> Result<()> where E: ElementFormat { match *self { Name::Imported(ref imported) => { if let Some(ref alias) = imported.alias { write!(out, "{}.{}", alias, imported.name.clone())?; } else { write!(out, "{}.{}", imported.module, imported.name.clone())?; } } Name::BuiltIn(ref built_in) => out.write_str(&built_in.name)?, Name::Local(ref local) => out.write_str(&local.name)?, } Ok(()) } } #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)] pub struct ImportedName { pub module: String, pub name: String, pub alias: Option<String>, } #[derive(Debug, Clone)] pub struct BuiltInName { pub name: String, } #[derive(Debug, Clone)] pub struct LocalName { pub name: String, } impl<'a, T> From<&'a T> for Name where T: Into<Name> + Clone { fn from(value: &'a T) -> Name { value.clone().into() } } impl From<ImportedName> for Name { fn from(value: ImportedName) -> Name { Name::Imported(value) } } impl From<BuiltInName> for Name { fn from(value: BuiltInName) -> Name { Name::BuiltIn(value) } } impl From<LocalName> for Name { fn from(value: LocalName) -> Name { Name::Local(value) } } impl From<Name> for Variable { fn from(value: Name) -> Variable { Variable::Name(value) } } impl From<ImportedName> for Variable { fn from(value: ImportedName) -> Variable { Variable::Name(value.into()) } } impl From<BuiltInName> for Variable { fn from(value: BuiltInName) -> Variable { Variable::Name(value.into()) } } impl From<LocalName> for Variable { fn from(value: LocalName) -> Variable { Variable::Name(value.into()) } }