19 lines
524 B
Rust
19 lines
524 B
Rust
use std::fmt::Debug;
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use crate::errors::InterpreterError;
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use super::{EnvironmentRef, Value};
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/// A callable is some object that supports being called.
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pub trait Callable: Debug + ToString {
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/// Return the amount of arguments supported by the callable.
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fn arity(&self) -> usize;
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/// Run the callable in the execution environment with the specified
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/// arguments.
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fn call(
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&self,
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environment: &EnvironmentRef,
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arguments: Vec<Value>,
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) -> Result<Value, InterpreterError>;
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}
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