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Add source to contexts.

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This commit is contained in:
Stephen Chung
2020-12-21 23:12:45 +08:00
parent 5ac83f0f46
commit ff67efc6d5
12 changed files with 67 additions and 27 deletions
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9
doc/src/language/fn-ptr.md
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@@ -228,6 +228,7 @@ of the particular call to a registered Rust function. It is a type that exposes
| Field | Type | Description |
| ------------------- | :-----------------------------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `engine()` | `&Engine` | the current [`Engine`], with all configurations and settings.<br/>This is sometimes useful for calling a script-defined function within the same evaluation context using [`Engine::call_fn`][`call_fn`], or calling a [function pointer]. |
| `source()` | `Option<&str>` | reference to the current source, if any |
| `imports()` | `Option<&Imports>` | reference to the current stack of [modules] imported via `import` statements (if any) |
| `iter_namespaces()` | `impl Iterator<Item = &Module>` | iterator of the namespaces (as [modules]) containing all script-defined functions |
@@ -254,11 +255,11 @@ let fn_ptr = engine.eval_ast::<FnPtr>(&ast)?;
// Get rid of the script, retaining only functions
ast.retain_functions(|_, _, _| true);
// Create function namespace from the 'AST'
let lib = [ast.as_ref()];
// Create native call context
let context = NativeCallContext::new(
&engine, // the 'Engine'
&[ast.as_ref()] // function namespace from the 'AST'
);
let context = NativeCallContext::new(&engine, &lib);
// 'f' captures: the engine, the AST, and the closure
let f = move |x: i64| fn_ptr.call_dynamic(context, None, [x.into()]);