add warning

Author: SteveL-MSFT

dsc_lib/locales/en-us.toml

@@ -201,6 +201,7 @@ notFound = "Environment variable not found"
 conditionNotBoolean = "Condition is not a boolean"
 
 [functions.format]
+experimental = "`format()` function is experimental"
 formatInvalid = "First `format()` argument must be a string"
 numberTooLarge = "Number is too large"
 invalidArgType = "Unsupported argument type"

dsc_lib/src/functions/format.rs

@@ -7,6 +7,7 @@ use crate::functions::{AcceptedArgKind, Function};
 use rt_format::{Format as RtFormat, FormatArgument, ParsedFormat, argument::NoNamedArguments};
 use rust_i18n::t;
 use serde_json::Value;
+use tracing::warn;
 
 #[derive(Debug, PartialEq)]
 enum Variant {
@@ -95,6 +96,7 @@ impl Function for Format {
     }
 
     fn invoke(&self, args: &[Value], _context: &Context) -> Result<Value, DscError> {
+        warn!("{}", t!("functions.format.experimental"));
         let Some(format_string) = args[0].as_str() else {
             return Err(DscError::Parser(t!("functions.format.formatInvalid").to_string()));
         };