rhai/tests/optimizer.rs

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#![cfg(not(feature = "no_optimize"))]
use rhai::{Engine, EvalAltResult, Module, OptimizationLevel, Scope, INT};
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#[test]
fn test_optimizer() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
engine.set_optimization_level(OptimizationLevel::Full);
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#[cfg(not(feature = "no_function"))]
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assert_eq!(
engine.eval::<INT>(
"
fn foo(x) { print(x); return; }
fn foo2(x) { if x > 0 {} return; }
42
"
)?,
42
);
Ok(())
}
#[test]
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fn test_optimizer_run() -> Result<(), Box<EvalAltResult>> {
fn run_test(engine: &mut Engine) -> Result<(), Box<EvalAltResult>> {
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assert_eq!(engine.eval::<INT>("if true { 42 } else { 123 }")?, 42);
assert_eq!(
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engine.eval::<INT>("if 1 == 1 || 2 > 3 { 42 } else { 123 }")?,
42
);
assert_eq!(
engine.eval::<INT>(r#"const abc = "hello"; if abc < "foo" { 42 } else { 123 }"#)?,
123
);
Ok(())
}
let mut engine = Engine::new();
engine.set_optimization_level(OptimizationLevel::None);
run_test(&mut engine)?;
engine.set_optimization_level(OptimizationLevel::Simple);
run_test(&mut engine)?;
engine.set_optimization_level(OptimizationLevel::Full);
run_test(&mut engine)?;
// Override == operator
engine.register_fn("==", |_x: INT, _y: INT| false);
engine.set_optimization_level(OptimizationLevel::Simple);
assert_eq!(
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engine.eval::<INT>("if 1 == 1 || 2 > 3 { 42 } else { 123 }")?,
123
);
engine.set_optimization_level(OptimizationLevel::Full);
assert_eq!(
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engine.eval::<INT>("if 1 == 1 || 2 > 3 { 42 } else { 123 }")?,
123
);
Ok(())
}
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#[cfg(not(feature = "no_module"))]
#[cfg(not(feature = "no_function"))]
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#[cfg(not(feature = "no_position"))]
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#[test]
fn test_optimizer_parse() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
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engine.set_optimization_level(OptimizationLevel::Simple);
let ast = engine.compile("{ const DECISION = false; if DECISION { 42 } else { 123 } }")?;
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assert_eq!(format!("{:?}", ast), "AST { body: [Expr(123 @ 1:53)] }");
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let ast = engine.compile("const DECISION = false; if DECISION { 42 } else { 123 }")?;
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assert_eq!(
format!("{:?}", ast),
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r#"AST { body: [Var(("DECISION" @ 1:7, false @ 1:18, None), CONSTANT, 1:1), Expr(123 @ 1:51)] }"#
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);
let ast = engine.compile("if 1 == 2 { 42 }")?;
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assert_eq!(format!("{:?}", ast), "AST { body: [] }");
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engine.set_optimization_level(OptimizationLevel::Full);
let ast = engine.compile("abs(-42)")?;
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assert_eq!(format!("{:?}", ast), "AST { body: [Expr(42 @ 1:1)] }");
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let ast = engine.compile("NUMBER")?;
assert_eq!(
format!("{:?}", ast),
"AST { body: [Expr(Variable(NUMBER) @ 1:1)] }"
);
let mut module = Module::new();
module.set_var("NUMBER", 42 as INT);
engine.register_global_module(module.into());
let ast = engine.compile("NUMBER")?;
assert_eq!(format!("{:?}", ast), "AST { body: [Expr(42 @ 1:1)] }");
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Ok(())
}
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#[cfg(not(feature = "no_function"))]
#[test]
fn test_optimizer_scope() -> Result<(), Box<EvalAltResult>> {
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const SCRIPT: &str = "
fn foo() { FOO }
foo()
";
let engine = Engine::new();
let mut scope = Scope::new();
scope.push_constant("FOO", 42 as INT);
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let ast = engine.compile_with_scope(&scope, SCRIPT)?;
scope.push("FOO", 123 as INT);
assert_eq!(engine.eval_ast::<INT>(&ast)?, 42);
assert_eq!(engine.eval_ast_with_scope::<INT>(&mut scope, &ast)?, 42);
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let ast = engine.compile_with_scope(&scope, SCRIPT)?;
assert!(engine.eval_ast_with_scope::<INT>(&mut scope, &ast).is_err());
Ok(())
}