Open
Description
TypeScript Version: 2.4.0
Feature Request
signatureHelp current shows when a parameter is optional but does not include any information about that parameter's default value:
function foo(x = 10) { }
foo(|)Result of TSServer signatureHelp on foo
[Trace - 5:42:22 PM] Response received: signatureHelp (378). Request took 20 ms. Success: true
Result: {
"items": [
{
"isVariadic": false,
"prefixDisplayParts": [
{
"text": "foo",
"kind": "functionName"
},
{
"text": "(",
"kind": "punctuation"
}
],
"suffixDisplayParts": [
{
"text": ")",
"kind": "punctuation"
},
{
"text": ":",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "void",
"kind": "keyword"
}
],
"separatorDisplayParts": [
{
"text": ",",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
}
],
"parameters": [
{
"name": "x",
"documentation": [],
"displayParts": [
{
"text": "x",
"kind": "parameterName"
},
{
"text": "?",
"kind": "punctuation"
},
{
"text": ":",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "number",
"kind": "keyword"
}
],
"isOptional": true
}
],
"documentation": [],
"tags": []
}
],
"applicableSpan": {
"start": {
"line": 3,
"offset": 5
},
"end": {
"line": 3,
"offset": 5
}
},
"selectedItemIndex": 0,
"argumentIndex": 0,
"argumentCount": 0
}
When the default value is a simple literal type, it would be helpful to display this default value in the signature help. This information could be included in the displayParts response