# Parser.Char

Consumes one exact leading character.

## Signatures

```ts
interface Char<C extends string> extends TypeFunction<string, Result<C, string>> {
    readonly return: InputOf<this> extends `${C}${infer Rest}` ? readonly [
        C,
        Rest
    ] : never;
}
```

## Why

Atomic character matching builds route punctuation parsers without widening input.

## Ownership and lifetime

TypeScript instantiates `Char` while parsing a string-literal input; partial results and unconsumed text exist only in the resulting type.

## Property: return

Computes this type lambda's parse result for its current input.

## Property: return: Why

The local type-function protocol evaluates each parser combinator through this member without a parallel runtime object.

## Property: return: Ownership and lifetime

TypeScript evaluates `Char.return` when the surrounding parser is applied; the associated result is erased and retains no input at runtime.