Struct rubble_templates::evaluator::functions::SimpleFunction [−][src]
Expand description
A wrapper for a Fn(&[String]) -> String
, to be used in Evaluator.
Example:
use rubble_templates::evaluator::{Evaluator, Function, SyntaxError}; use rubble_templates::evaluator::ast::SyntaxNode; use std::collections::HashMap; use rubble_templates::template::Template; use rubble_templates::compile_template_from_string; use rubble_templates::evaluator::functions::SimpleFunction; fn plus_function(parameters: &[String]) -> String { 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(), SimpleFunction::new(plus_function)); // will be treated as Box<dyn Function> let variables: HashMap<String, String> = HashMap::new(); let result = compile_template_from_string("2 + 2 = {{ plus 2 2 }}".to_string(), variables, functions); assert_eq!(result.ok(), Some("2 + 2 = 4".to_string()));
Implementations
Trait Implementations
Auto Trait Implementations
impl<F> RefUnwindSafe for SimpleFunction<F> where
F: RefUnwindSafe,
impl<F> Send for SimpleFunction<F> where
F: Send,
impl<F> Sync for SimpleFunction<F> where
F: Sync,
impl<F> Unpin for SimpleFunction<F> where
F: Unpin,
impl<F> UnwindSafe for SimpleFunction<F> where
F: UnwindSafe,