Method extern_item

crates/tinywasm/src/instance.rs:373–389

Get any exported extern value by name. ## Example ```rust # fn main() -> tinywasm::Result<()> { # use tinywasm::{ExternItem, ModuleInstance, Store}; # let wasm = wat::parse_str(r#" # (module # (global (export "answer") i32 (i32.const 42))) # "#).expect("valid wat"); # let module = tinywasm::parse_bytes(&wasm)?; # let mut store = Store::default(); let instance = ModuleInstance::instantia

(&self, name: &str)

    /// # }
    /// ```
    pub fn extern_item(&self, name: &str) -> Result<ExternItem> {
        match self.require_export(name)? {
            ExternVal::Func(addr) => {
                let export = self.0.exports.iter().find(|e| e.name == name.into());
                let export = export.ok_or_else(|| Error::Other(format!("Export not found: {name}")))?;
                Ok(ExternItem::Func(Function {
                    item: crate::StoreItem::new(self.0.store_id, addr),
                    module_addr: self.id(),
                    addr,
                    ty: self.func_type_by_type_index(self.func_type_idx(export.index)).clone(),
                }))
            }
            ExternVal::Memory(addr) => Ok(ExternItem::Memory(Memory::from_store_addr(self.0.store_id, addr))),
            ExternVal::Table(addr) => Ok(ExternItem::Table(Table::from_store_addr(self.0.store_id, addr))),
            ExternVal::Global(addr) => Ok(ExternItem::Global(Global::from_store_addr(self.0.store_id, addr))),
        }
    }

    /// Get a function export by name.
    ///