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StdlibModule

pepl_stdlib

Trait StdlibModule 

Source 
pub trait StdlibModule {
    // Required methods
    fn name(&self) -> &'static str;
    fn has_function(&self, function: &str) -> bool;
    fn call(
        &self,
        function: &str,
        args: Vec<Value>,
    ) -> Result<Value, StdlibError>;
}
Expand description

Trait implemented by each PEPL stdlib module.

Every module (core, math, string, list, etc.) implements this trait. The evaluator dispatches module.function(args...) calls through it.

§Example

ⓘ
let core_mod = CoreModule::new();
let result = core_mod.call("type_of", vec![Value::Number(42.0)])?;
assert_eq!(result, Value::String("number".into()));

Required Methods§

Source

fn name(&self) -> &'static str

Module name as it appears in PEPL source (e.g., "core", "math").

Source

fn has_function(&self, function: &str) -> bool

Check if a function exists in this module.

Source

fn call(&self, function: &str, args: Vec<Value>) -> Result<Value, StdlibError>

Call a function in this module with the given arguments.

Returns Err(StdlibError::UnknownFunction) if the function doesn’t exist. Returns Err(StdlibError::WrongArgCount) if argument count is wrong. Returns Err(StdlibError::TypeMismatch) if an argument has the wrong type.

Implementors§