mirror of
https://github.com/nim-lang/Nim.git
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555c5ed1a7
* better error messages for dot operators [backport] fixes #13063 * also fixes #7777 * fix #6981 and #9831 too * fix * minor improvement * sus test fixes * make test multiplatform lol * fix nimsuggest test, extra improvements
183 lines
4.7 KiB
Nim
183 lines
4.7 KiB
Nim
discard """
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cmd: "nim c --verbosity:0 --colors:off $file"
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nimout: '''
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texplain.nim(162, 10) Hint: Non-matching candidates for e(y)
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proc e(i: int): int
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first type mismatch at position: 1
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required type for i: int
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but expression 'y' is of type: MatchingType
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texplain.nim(165, 7) Hint: Non-matching candidates for e(10)
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proc e(o: ExplainedConcept): int
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first type mismatch at position: 1
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required type for o: ExplainedConcept
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but expression '10' is of type: int literal(10)
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texplain.nim(128, 6) ExplainedConcept: undeclared field: 'foo'
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texplain.nim(128, 5) ExplainedConcept: concept predicate failed
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texplain.nim(129, 6) ExplainedConcept: undeclared field: 'bar'
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texplain.nim(128, 5) ExplainedConcept: concept predicate failed
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texplain.nim(168, 10) Hint: Non-matching candidates for e(10)
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proc e(o: ExplainedConcept): int
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first type mismatch at position: 1
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required type for o: ExplainedConcept
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but expression '10' is of type: int literal(10)
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texplain.nim(128, 6) ExplainedConcept: undeclared field: 'foo'
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texplain.nim(128, 5) ExplainedConcept: concept predicate failed
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texplain.nim(129, 6) ExplainedConcept: undeclared field: 'bar'
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texplain.nim(128, 5) ExplainedConcept: concept predicate failed
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texplain.nim(172, 20) Error: type mismatch: got <NonMatchingType>
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but expected one of:
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proc e(i: int): int
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first type mismatch at position: 1
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required type for i: int
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but expression 'n' is of type: NonMatchingType
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proc e(o: ExplainedConcept): int
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first type mismatch at position: 1
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required type for o: ExplainedConcept
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but expression 'n' is of type: NonMatchingType
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texplain.nim(172, 9) template/generic instantiation of `assert` from here
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texplain.nim(128, 5) ExplainedConcept: concept predicate failed
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expression: e(n)
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texplain.nim(173, 20) Error: type mismatch: got <NonMatchingType>
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but expected one of:
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proc r(i: string): int
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first type mismatch at position: 1
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required type for i: string
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but expression 'n' is of type: NonMatchingType
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proc r(o: RegularConcept): int
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first type mismatch at position: 1
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required type for o: RegularConcept
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but expression 'n' is of type: NonMatchingType
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texplain.nim(173, 9) template/generic instantiation of `assert` from here
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texplain.nim(132, 5) RegularConcept: concept predicate failed
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proc r[T](a: SomeNumber; b: T; c: auto)
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first type mismatch at position: 1
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required type for a: SomeNumber
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but expression 'n' is of type: NonMatchingType
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expression: r(n)
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texplain.nim(174, 20) Hint: Non-matching candidates for r(y)
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proc r(i: string): int
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first type mismatch at position: 1
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required type for i: string
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but expression 'y' is of type: MatchingType
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proc r[T](a: SomeNumber; b: T; c: auto)
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first type mismatch at position: 1
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required type for a: SomeNumber
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but expression 'y' is of type: MatchingType
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texplain.nim(182, 2) Error: type mismatch: got <MatchingType>
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but expected one of:
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proc f(o: NestedConcept)
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first type mismatch at position: 1
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required type for o: NestedConcept
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but expression 'y' is of type: MatchingType
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texplain.nim(132, 6) RegularConcept: undeclared field: 'foo'
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texplain.nim(132, 5) RegularConcept: concept predicate failed
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texplain.nim(133, 6) RegularConcept: undeclared field: 'bar'
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texplain.nim(132, 5) RegularConcept: concept predicate failed
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texplain.nim(136, 5) NestedConcept: concept predicate failed
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expression: f(y)'''
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errormsg: "type mismatch: got <MatchingType>"
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"""
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# proc r[T](a: SomeNumber; b: T; c: auto)
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# proc r(i: string): int
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# proc r(o: RegularConcept): int
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# line 124 HERE
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type
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ExplainedConcept {.explain.} = concept o
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o.foo is int
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o.bar is string
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RegularConcept = concept o
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o.foo is int
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o.bar is string
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NestedConcept = concept o
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o.foo is RegularConcept
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NonMatchingType = object
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foo: int
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bar: int
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MatchingType = object
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foo: int
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bar: string
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proc e(o: ExplainedConcept): int = 1
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proc e(i: int): int = i
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proc r[T](a: SomeNumber, b: T, c: auto) = discard
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proc r(o: RegularConcept): int = 1
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proc r(i: string): int = 1
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proc f(o: NestedConcept) = discard
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var n = NonMatchingType(foo: 10, bar: 20)
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var y = MatchingType(foo: 10, bar: "bar")
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# no diagnostic here:
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discard e(y)
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# explain that e(int) doesn't match
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discard e(y) {.explain.}
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# explain that e(ExplainedConcept) doesn't match
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echo(e(10) {.explain.}, 20)
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# explain that e(ExplainedConcept) doesn't again
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discard e(10)
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static:
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# provide diagnostics why the compile block failed
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assert(compiles(e(n)) {.explain.} == false)
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assert(compiles(r(n)) {.explain.} == false)
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assert(compiles(r(y)) {.explain.} == true)
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# these should not produce any output
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assert(compiles(r(10)) == false)
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assert(compiles(e(10)) == true)
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# finally, provide multiple nested explanations for failed matching
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# of regular concepts, even when the explain pragma is not used
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f(y)
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