pub struct FunctionWithContext<F>{ /* private fields */ }
Expand description
A wrapper for a Fn(&dyn Evaluator, &[String], &mut Context) -> Result<String, SyntaxError>
, to be used in Evaluator.
Example:
use std::collections::HashMap;
use rubble_templates_core::evaluator::{Context, SyntaxError, Function};
use rubble_templates_core::functions::FunctionWithContext;
fn plus_function(parameters: &[String], _context: &mut Context) -> Result<String, SyntaxError> {
Ok(
parameters.iter()
.map(|param|
param.parse::<i32>().unwrap()
)
.sum::<i32>()
.to_string()
)
}
let mut functions: HashMap<String, Box<dyn Function>> = HashMap::new();
functions.insert("plus".to_string(), FunctionWithContext::new(plus_function)); // will be treated as Box<dyn Function>
Implementations§
Source§impl<F> FunctionWithContext<F>
impl<F> FunctionWithContext<F>
pub fn new(function: F) -> Box<FunctionWithContext<F>>
Trait Implementations§
Source§impl<F> Function for FunctionWithContext<F>
impl<F> Function for FunctionWithContext<F>
fn evaluate( &self, evaluator: &dyn Evaluator, parameters: &[SyntaxNode], context: &mut Context, ) -> Result<String, SyntaxError>
Auto Trait Implementations§
impl<F> Freeze for FunctionWithContext<F>where
F: Freeze,
impl<F> RefUnwindSafe for FunctionWithContext<F>where
F: RefUnwindSafe,
impl<F> Send for FunctionWithContext<F>where
F: Send,
impl<F> Sync for FunctionWithContext<F>where
F: Sync,
impl<F> Unpin for FunctionWithContext<F>where
F: Unpin,
impl<F> UnwindSafe for FunctionWithContext<F>where
F: UnwindSafe,
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more