100 lines
2.6 KiB
Rust
100 lines
2.6 KiB
Rust
use rhai::{Dynamic, Engine, EvalAltResult, ImmutableString, NativeCallContext, INT};
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use std::any::TypeId;
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#[cfg(not(feature = "no_module"))]
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#[cfg(not(feature = "unchecked"))]
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#[test]
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fn test_native_context() -> Result<(), Box<EvalAltResult>> {
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let mut engine = Engine::new();
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engine.set_max_modules(40);
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engine.register_fn("test", |context: NativeCallContext, x: INT| {
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context.engine().max_modules() as INT + x
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});
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assert_eq!(engine.eval::<INT>("test(2)")?, 42);
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Ok(())
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}
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#[test]
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fn test_native_context_fn_name() -> Result<(), Box<EvalAltResult>> {
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fn add_double(
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context: NativeCallContext,
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args: &mut [&mut Dynamic],
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) -> Result<Dynamic, Box<EvalAltResult>> {
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let x = args[0].as_int().unwrap();
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let y = args[1].as_int().unwrap();
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Ok(format!("{}_{}", context.fn_name(), x + 2 * y).into())
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}
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let mut engine = Engine::new();
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engine
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.register_raw_fn(
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"add_double",
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&[TypeId::of::<INT>(), TypeId::of::<INT>()],
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add_double,
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)
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.register_raw_fn(
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"append_x2",
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&[TypeId::of::<INT>(), TypeId::of::<INT>()],
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add_double,
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);
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assert_eq!(engine.eval::<String>("add_double(40, 1)")?, "add_double_42");
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assert_eq!(engine.eval::<String>("append_x2(40, 1)")?, "append_x2_42");
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Ok(())
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}
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#[test]
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fn test_native_overload() -> Result<(), Box<EvalAltResult>> {
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let mut engine = Engine::new();
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assert_eq!(
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engine.eval::<String>(r#"let x = "hello, "; let y = "world"; x + y"#)?,
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"hello, world"
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);
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assert_eq!(
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engine.eval::<String>(r#"let x = "hello"; let y = (); x + y"#)?,
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"hello"
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);
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// Overload the `+` operator for strings
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engine
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.register_fn(
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"+",
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|s1: ImmutableString, s2: ImmutableString| -> ImmutableString {
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format!("{s1}***{s2}").into()
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},
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)
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.register_fn("+", |s1: ImmutableString, _: ()| -> ImmutableString {
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format!("{s1} Foo!").into()
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});
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assert_eq!(
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engine.eval::<String>(r#"let x = "hello"; let y = "world"; x + y"#)?,
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"hello***world"
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);
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assert_eq!(
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engine.eval::<String>(r#"let x = "hello"; let y = (); x + y"#)?,
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"hello Foo!"
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);
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engine.set_fast_operators(true);
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assert_eq!(
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engine.eval::<String>(r#"let x = "hello"; let y = "world"; x + y"#)?,
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"helloworld"
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);
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assert_eq!(
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engine.eval::<String>(r#"let x = "hello"; let y = (); x + y"#)?,
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"hello"
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);
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Ok(())
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}
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