From efcc4cfbe121203443d146961f5fce2c9d117a69 Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Thu, 28 Nov 2024 14:42:37 -0500
Subject: [PATCH] add is_str

---
 crates/ruff_python_semantic/src/analyze/typing.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/crates/ruff_python_semantic/src/analyze/typing.rs b/crates/ruff_python_semantic/src/analyze/typing.rs
index 9cf8888b72f7db..6a07feeb147f1f 100644
--- a/crates/ruff_python_semantic/src/analyze/typing.rs
+++ b/crates/ruff_python_semantic/src/analyze/typing.rs
@@ -665,6 +665,14 @@ impl BuiltinTypeChecker for IntChecker {
     const EXPR_TYPE: PythonType = PythonType::Number(NumberLike::Integer);
 }
 
+struct StrChecker;
+
+impl BuiltinTypeChecker for StrChecker {
+    const BUILTIN_TYPE_NAME: &'static str = "str";
+    const TYPING_NAME: Option<&'static str> = None;
+    const EXPR_TYPE: PythonType = PythonType::String;
+}
+
 pub struct IoBaseChecker;
 
 impl TypeChecker for IoBaseChecker {
@@ -779,6 +787,11 @@ pub fn is_int(binding: &Binding, semantic: &SemanticModel) -> bool {
     check_type::<IntChecker>(binding, semantic)
 }
 
+/// Test whether the given binding can be considered a string.
+pub fn is_str(binding: &Binding, semantic: &SemanticModel) -> bool {
+    check_type::<StrChecker>(binding, semantic)
+}
+
 /// Test whether the given binding can be considered a set.
 ///
 /// For this, we check what value might be associated with it through it's initialization and