func (p *parser) readExtension(ext *ast.Extension) *parseError {
if err := p.readToken("extend"); err != nil {
return err
}
ext.Position = p.cur.astPosition()
tok := p.next()
if tok.err != nil {
return tok.err
}
ext.Extendee = tok.value // checked during resolution
if err := p.readToken("{"); err != nil {
return err
}
for !p.done {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value == "}" {
// end of extension
return nil
}
p.back()
field := new(ast.Field)
ext.Fields = append(ext.Fields, field)
field.Up = ext // p.readFile uses this
if err := p.readField(field); err != nil {
return err
}
}
return p.errorf("unexpected EOF while parsing extension")
}
