Method declare_data

cranelift/module/src/module.rs:777–809

Declare a data object in this module.

(
        &mut self,
        name: &str,
        linkage: Linkage,
        writable: bool,
        tls: bool,
    )

    /// Declare a data object in this module.
    pub fn declare_data(
        &mut self,
        name: &str,
        linkage: Linkage,
        writable: bool,
        tls: bool,
    ) -> ModuleResult<(DataId, Linkage)> {
        // TODO: Can we avoid allocating names so often?
        use super::hash_map::Entry::*;
        match self.names.entry(name.to_owned()) {
            Occupied(entry) => match *entry.get() {
                FuncOrDataId::Data(id) => {
                    let existing = &mut self.data_objects[id];
                    existing.merge(linkage, writable, tls);
                    Ok((id, existing.linkage))
                }

                FuncOrDataId::Func(..) => {
                    Err(ModuleError::IncompatibleDeclaration(name.to_owned()))
                }
            },
            Vacant(entry) => {
                let id = self.data_objects.push(DataDeclaration {
                    name: Some(name.to_owned()),
                    linkage,
                    writable,
                    tls,
                });
                entry.insert(FuncOrDataId::Data(id));
                Ok((id, self.data_objects[id].linkage))
            }
        }
    }

    /// Declare an anonymous data object in this module.
    pub fn declare_anonymous_data(&mut self, writable: bool, tls: bool) -> ModuleResult<DataId> {