47 lines
1.4 KiB
Rust
47 lines
1.4 KiB
Rust
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use dust_lang::*;
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#[test]
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fn subtract_assign() {
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let source = "let mut x = 42; x -= 2; x";
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assert_eq!(
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compile(source),
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Ok(Chunk::with_data(
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None,
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FunctionType {
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type_parameters: None,
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value_parameters: None,
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return_type: Box::new(Type::Integer),
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},
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vec![
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(
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Instruction::load_constant(Destination::Register(0), 0, false),
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Span(12, 14)
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),
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(Instruction::define_local(0, 0, true), Span(8, 9)),
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(
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Instruction::subtract(
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Destination::Local(0),
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Argument::Local(0),
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Argument::Constant(2)
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),
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Span(18, 20)
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),
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(
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Instruction::get_local(Destination::Register(1), 0),
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Span(24, 25)
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),
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(Instruction::r#return(true), Span(25, 25)),
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],
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vec![
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ConcreteValue::Integer(42),
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ConcreteValue::string("x"),
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ConcreteValue::Integer(2)
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],
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vec![Local::new(1, Type::Integer, true, Scope::default())]
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)),
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);
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assert_eq!(run(source), Ok(Some(ConcreteValue::Integer(40))));
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}
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