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7d6cbf290a
* Error -> Defect for defects The distinction between Error and Defect is subjective, context-dependent and somewhat arbitrary, so when looking at an exception, it's hard to guess what it is - this happens often when looking at a `raises` list _without_ opening the corresponding definition and digging through layers of inheritance. With the help of a little consistency in naming, it's at least possible to start disentangling the two error types and the standard lib can set a good example here.
112 lines
2.6 KiB
Nim
112 lines
2.6 KiB
Nim
discard """
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output: '''
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`false` first assertion from bar
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`false` second assertion from bar
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-1
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'''
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"""
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from strutils import endsWith
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type
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TLineInfo = tuple[filename: string, line: int, column: int]
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TMyError = object of Exception
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lineinfo: TLineInfo
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EMyError = ref TMyError
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# NOTE: when entering newlines, adjust `expectedEnd` outputs
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try:
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doAssert(false, "msg1") # doAssert test
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except AssertionDefect as e:
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assert e.msg.endsWith "tassert2.nim(20, 11) `false` msg1"
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try:
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assert false # assert test with no msg
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except AssertionDefect as e:
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assert e.msg.endsWith "tassert2.nim(25, 10) `false` "
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try:
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let a = 1
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doAssert(a+a==1) # assert test with Ast expression
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# BUG: const folding would make "1+1==1" appear as `false` in
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# assert message
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except AssertionDefect as e:
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assert e.msg.endsWith "`a + a == 1` "
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try:
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let a = 1
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doAssert a+a==1 # ditto with `doAssert` and no parens
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except AssertionDefect as e:
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assert e.msg.endsWith "`a + a == 1` "
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proc fooStatic() =
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# protect against https://github.com/nim-lang/Nim/issues/8758
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static: doAssert(true)
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fooStatic()
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block:
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# scope-wide policy to change the failed assert
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# exception type in order to include a lineinfo
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onFailedAssert(msg):
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var e = new(TMyError)
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e.msg = msg
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e.lineinfo = instantiationInfo(-2)
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raise e
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proc foo =
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assert(false, "assertion from foo")
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proc bar: int =
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# local overrides that are active only in this proc
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onFailedAssert(msg):
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echo msg[^32..^1]
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assert(false, "first assertion from bar")
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onFailedAssert(msg):
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echo msg[^33..^1]
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return -1
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assert(false, "second assertion from bar")
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return 10
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echo(bar())
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try:
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foo()
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except:
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let e = EMyError(getCurrentException())
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assert e.msg.endsWith "tassert2.nim(62, 11) `false` assertion from foo"
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block: ## checks for issue https://github.com/nim-lang/Nim/issues/8518
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template fun(a: string): string =
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const pattern = a & a
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pattern
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try:
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doAssert fun("foo1") == fun("foo2"), "mymsg"
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except AssertionDefect as e:
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# used to expand out the template instantiaiton, sometimes filling hundreds of lines
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assert e.msg.endsWith ""
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block: ## checks for issue https://github.com/nim-lang/Nim/issues/9301
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try:
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doAssert 1 + 1 == 3
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except AssertionDefect as e:
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# used to const fold as false
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assert e.msg.endsWith "tassert2.nim(100, 14) `1 + 1 == 3` "
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block: ## checks AST isn't transformed as it used to
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let a = 1
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try:
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doAssert a > 1
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except AssertionDefect as e:
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# used to rewrite as `1 < a`
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assert e.msg.endsWith "tassert2.nim(108, 14) `a > 1` "
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