context receivers cause unexpected formatting of the function signature

[david-kubecka]

Expected Behavior

Take the following function:

fun someFunction(longParam: String, longParam2: String, longParam3: String, longParam4: String) = 1

The formatting is accepted by ktlint (see config below). Adding a context receiver, I would expect no change in the formatting of the function signature:

context(String, Int, Long)
fun someFunction(longParam: String, longParam2: String, longParam3: String, longParam4: String) = 1

Observed Behavior

ktlint formats as follows:

context(String, Int, Long)
fun someFunction(
    longParam: String,
    longParam2: String,
    longParam3: String,
    longParam4: String,
) = 1

I believe ktlint wrongly treats the context as part of the signature when calculating its length because a slightly shorter version (fitting on a line including the context directive) is accepted:

context(String, Int)
fun someFunction(longParam: String, longParam2: String, longParam3: String, longParam4: String) = 1

Your Environment

• ktlint version: 1.3.1
• editorconfig

[*]
charset = utf-8
indent_style = space
indent_size = 4
insert_final_newline = true
max_line_length = 120
trim_trailing_whitespace = true

[*.{kt,kts}]
ktlint_code_style = ktlint_official
ktlint_function_signature_rule_force_multiline_when_parameter_count_greater_or_equal_than = unset

[paul-dingemans]

I believe ktlint wrongly treats the context as part of the signature when calculating its length because a slightly shorter version (fitting on a line including the context directive) is accepted:

Your analysis is correct. Tnx for reporting.