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Fix default argument value type checking (#10460)

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# Description
Fix type checking in arguments default values not adhering to subtyping
rules
Currently following examples produce a parse error:
```nu
def test [ --qwe: record<a: int> = {a: 1 b: 1} ] { }
def test [ --qwe: list<any> = [ 1 2 3 ] ] { }
```
despite types matching. Type equality check is replaced with subtyping
check and everything parses fine:
# User-Facing Changes
Default values of flag arguments type checking behavior is in line with
`let` statements
This commit is contained in:
Artemiy 2023-09-24 12:30:58 +03:00 committed by GitHub
parent 65e2733571
commit e96039fb1b
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 7 additions and 1 deletions
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2
crates/nu-parser/src/parser.rs
View File

@ -3838,7 +3838,7 @@ pub fn parse_signature_helper(working_set: &mut StateWorkingSet, span: Span) ->
}
}
t => {
if t != &expression_ty {
if !type_compatible(t, &expression_ty) {
working_set.error(
ParseError::AssignmentMismatch(
"Default value is the wrong type"

6
tests/parsing/mod.rs
View File

@ -247,6 +247,12 @@ fn parse_long_duration() {
}
#[rstest]
#[case("def test [ --a: any = 32 ] {}")]
#[case("def test [ --a: number = 32 ] {}")]
#[case("def test [ --a: number = 32.0 ] {}")]
#[case("def test [ --a: list<any> = [ 1 2 3 ] ] {}")]
#[case("def test [ --a: record<a: int b: string> = { a: 32 b: 'qwe' c: 'wqe' } ] {}")]
#[case("def test [ --a: record<a: any b: any> = { a: 32 b: 'qwe'} ] {}")]
#[case("def test []: int -> int { 1 }")]
#[case("def test []: string -> string { 'qwe' }")]
#[case("def test []: nothing -> nothing { null }")]