binding in string literal

// Test 225b: Binding name appears in string literal but is not used as a variable
//
// Regression: continuationUsesBinding had a false positive when the binding
// name appeared as a whole word inside a string literal. This caused the
// emitter to skip the `_ = &binding;` suppressor, resulting in a Zig
// "unused local constant" error.
//
// The binding `name` is never referenced as a variable in the continuation
// body — it only appears inside the string literal "no name given".

~import std/io

~event greet { id: u32 }
| ok []const u8

~proc greet|zig {
    return .{ .ok = "Alice" };
}

// Binding is `name` — NOT used as a variable.
// But the word "name" appears in the string "no name given".
// Bug: containsIdentifier matches "name" inside the string literal
//      → continuationUsesBinding returns true (false positive)
//      → emitter skips `_ = &name;` suppressor
//      → Zig: "unused local constant 'name'"
~greet(id: 1)
| ok name |> std/io:print.ln("no name given")