ktlint_standard_string-template-indent incompatbile with multi-dollar interpolation

[mgroth0]

It is a bit difficult to create a reproducer because the latest release of ktlint uses an embedded kotlin version that throws errors when it encounters $$ before a string. But if you use an embedded kotlin compiler version of 2.1.0 with ktlint 1.4.1 and run it on this

fun main() {
    $$"""
        hello world
    """.trimIndent()
}

You end up with

fun main() {
    $$
    """
        hello world
    """.trimIndent()
}

Which is a syntax error.

Disabling ktlint_standard_string-template-indent is preventing this.

[mgroth0]

I don't know why originally it was another rule that seemed to be the cause, but I must have made some mistake. The cause is ktlint_standard_string-template-indent.

[paul-dingemans]

Tnx for reporting.

[paul-dingemans]

As documented on https://kotlinlang.org/docs/strings.html#multi-dollar-string-interpolation the number of $ before the multiline string can vary. Using $$ means that single $ can be used in the string without it being used for interpolation. Using $$$ means that both $ and $$ can be used in the string. The multidollar prefix can be recorgnized in the AST as shown below:

Note that compiler flag -Xmulti-dollar-interpolation needs to be enabled in order to use this feature.