# Parser.UppercaseAlphabet

The uppercase ASCII character union.

## Signatures

```ts
type UppercaseAlphabet = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z";
```

## Why

The parser avoids widening literal route names to arbitrary strings.

## Ownership and lifetime

`UppercaseAlphabet` is a string-literal union used only during compiler evaluation and is erased from emitted JavaScript.