0bee67a852
* Document and update the API of the `externals.rs` module This commit ensures that all public methods and items are documented in the `externals.rs` module, notably all external values that can be imported and exported in WebAssembly. Along the way this also tidies up the API and fixes a few bugs: * `Global::new` now returns a `Result` and fails if the provided value does not match the type of the global. * `Global::set` now returns a `Result` and fails if the global is either immutable or the provided value doesn't match the type of the global. * `Table::new` now fails if the provided initializer does not match the element type. * `Table::get` now returns `Option<Val>` instead of implicitly returning null. * `Table::set` now returns `Result<()>`, returning an error on out of bounds or if the input type is of the wrong type. * `Table::grow` now returns `Result<u32>`, returning the previous number of table elements if succesful or an error if the maximum is reached or the initializer value is of the wrong type. Additionally a bug was fixed here where if the wrong initializer was provided the table would be grown still, but initialization would fail. * `Memory::data` was renamed to `Memory::data_unchecked_mut`. Additionally `Memory::data_unchecked` was added. Lots of caveats were written down about how using the method can go wrong. * `Memory::grow` now returns `Result<u32>`, returning an error if growth fails or the number of pages previous the growth if successful. * Run rustfmt * Fix another test * Update crates/api/src/externals.rs Co-Authored-By: Sergei Pepyakin <s.pepyakin@gmail.com> Co-authored-by: Sergei Pepyakin <s.pepyakin@gmail.com>
35 lines
840 B
Rust
35 lines
840 B
Rust
use anyhow::{Context as _, Result};
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use wasmtime::*;
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#[test]
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fn test_invoke_func_via_table() -> Result<()> {
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let store = Store::default();
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let binary = wat::parse_str(
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r#"
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(module
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(func $f (result i64) (i64.const 42))
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(table (export "table") 1 1 anyfunc)
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(elem (i32.const 0) $f)
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)
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"#,
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)?;
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let module = Module::new(&store, &binary).context("> Error compiling module!")?;
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let instance = Instance::new(&module, &[]).context("> Error instantiating module!")?;
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let f = instance
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.get_export("table")
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.unwrap()
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.table()
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.unwrap()
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.get(0)
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.unwrap()
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.funcref()
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.unwrap()
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.clone();
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let result = f.call(&[]).unwrap();
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assert_eq!(result[0].unwrap_i64(), 42);
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Ok(())
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}
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