Struct StrictFormatter 

pub struct StrictFormatter;

A strict formatter that checks for extra keys and requires all arguments as keyword arguments.

This formatter is based on Python’s string formatting but enforces stricter rules:

• All arguments must be provided as keyword arguments
• All placeholders in the format string must be used

Implementations

impl StrictFormatter

pub fn new() -> Self

Create a new StrictFormatter.

pub fn format( &self, format_string: &str, kwargs: &HashMap<String, String>, ) -> Result<String, FormattingError>

Format a string with keyword arguments.

Arguments

• format_string - The format string with placeholders like {name}.
• kwargs - The keyword arguments to substitute.

Returns

The formatted string, or an error if formatting fails.

Example

use std::collections::HashMap;
use agent_chain_core::utils::formatting::StrictFormatter;

let formatter = StrictFormatter::new();
let mut kwargs = HashMap::new();
kwargs.insert("name".to_string(), "World".to_string());

let result = formatter.format("Hello, {name}!", &kwargs).unwrap();
assert_eq!(result, "Hello, World!");

pub fn validate_input_variables( &self, format_string: &str, input_variables: &[String], ) -> Result<(), FormattingError>

Validate that input variables can be used with the format string.

Arguments

• format_string - The format string to validate.
• input_variables - The input variables that will be provided.

Returns

Ok(()) if validation passes, or an error if any input variables are not used.

Example

use agent_chain_core::utils::formatting::StrictFormatter;

let formatter = StrictFormatter::new();
let result = formatter.validate_input_variables("Hello, {name}!", &["name".to_string()]);
assert!(result.is_ok());

pub fn extract_placeholders(&self, format_string: &str) -> HashSet<String>

Extract placeholders from a format string.

Arguments

• format_string - The format string to extract placeholders from.

Returns

A set of placeholder names found in the format string.

Trait Implementations

impl Clone for StrictFormatter

fn clone(&self) -> StrictFormatter

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StrictFormatter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StrictFormatter

fn default() -> StrictFormatter

Returns the “default value” for a type.