Handling "remainder" in a search term like query

[callumj]

Hello,

Thank you so much for this project. I've read the examples and docs but I seem to be tripping up when I want to parse strings like this:

• key:value another:value some remaining search text
• key:value another:value "quoted text"

Where I want the non key values to be an array of strings (or in the case of the quoted string just one item).

I've been using this syntax:

type FullTextField struct {
	Fields  []*Field `@@*`
	Strings []*Value `@@*`
}

type Field struct {
	Key    string  `@Ident ":"`
	Values []Value `@@ ( "," @@ )*`
}

type Value struct {
	Str string `@Ident`
}

But I seem to be able to trip it up when a quote is used, as it doesn't seem to generate an invalid symbol.

[alecthomas]

I would probably structure this like so:

type Search struct {
  Entry []*Entry `@@*`
}

type Entry struct {
  Field *Field `  @@`
  String *string `| @String`
  Value *string `| @Ident`
}

[alecthomas]

I just noticed that you will need a bit of lookahead to resolve this though because Field and Value both start with an @Ident and Participle will need to backtrack at that point.

[callumj]

That is exactly the pointer I needed, thanks @alecthomas!

[alecthomas]

You're welcome :)