Which @angular/* package(s) are the source of the bug?

compiler

Is this a regression?

No

Description

No correct start location when there is no expression

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

import { Lexer, Parser } from '@angular/compiler';

const parse = (text) => {
  const lexer = new Lexer();
  const parser = new Parser(lexer);

  return parser.parseBinding(text, '', 0);
};

console.log(parse('`abc`').ast)

ASTWithSource {
  span: ParseSpan { start: 0, end: 6 },
  sourceSpan: AbsoluteSourceSpan { start: 0, end: 6 },
  ast: TemplateLiteral {
    span: ParseSpan { start: 6, end: 6 },
    sourceSpan: AbsoluteSourceSpan { start: 6, end: 6 },
    elements: [ [TemplateLiteralElement] ],
    expressions: []
  },
  source: '`abcd`',
  location: '',
  errors: []
}

There is no clue where it starts, since characters can be encoded, I can't use the cooked text value to locate.

Please provide the environment you discovered this bug in (run ng version)

@angular/compiler 19.2.1

Anything else?

I'm trying to add support in Prettier. prettier/prettier#17238

Related issue #60320