Try to re-apply #1039

crates/nu-protocol/src/call_info.rs

@@ -1,7 +1,7 @@
-use nu_errors::ShellError;
 use crate::value::Value;
 use derive_new::new;
 use indexmap::IndexMap;
+use nu_errors::ShellError;
 use nu_source::Tag;
 use serde::{Deserialize, Serialize};
 

crates/nu-protocol/src/return_value.rs

@@ -1,5 +1,5 @@
-use nu_errors::ShellError;
 use crate::value::Value;
+use nu_errors::ShellError;
 use nu_source::{b, DebugDocBuilder, PrettyDebug};
 use serde::{Deserialize, Serialize};
 

crates/nu-protocol/src/value.rs

@@ -139,6 +139,13 @@ impl Value {
         }
     }
 
+    pub fn as_forgiving_string(&self) -> Result<&str, ShellError> {
+        match &self.value {
+            UntaggedValue::Primitive(Primitive::String(string)) => Ok(&string[..]),
+            _ => Err(ShellError::type_error("string", self.spanned_type_name())),
+        }
+    }
+
     pub fn as_path(&self) -> Result<PathBuf, ShellError> {
         match &self.value {
             UntaggedValue::Primitive(Primitive::Path(path)) => Ok(path.clone()),

crates/nu-protocol/src/value/convert.rs

@@ -1,8 +1,8 @@
-use nu_errors::{CoerceInto, ShellError};
 use crate::type_name::SpannedTypeName;
 use crate::value::dict::Dictionary;
 use crate::value::primitive::Primitive;
 use crate::value::{UntaggedValue, Value};
+use nu_errors::{CoerceInto, ShellError};
 use nu_source::TaggedItem;
 
 impl std::convert::TryFrom<&Value> for i64 {