mirror of
https://github.com/nim-lang/Nim.git
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97 lines
3.2 KiB
Nim
97 lines
3.2 KiB
Nim
discard """
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action: "run"
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"""
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import strformat
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type Obj = object
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proc `$`(o: Obj): string = "foobar"
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# for custom types, formatValue needs to be overloaded.
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template formatValue(result: var string; value: Obj; specifier: string) =
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result.formatValue($value, specifier)
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var o: Obj
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doAssert fmt"{o}" == "foobar"
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doAssert fmt"{o:10}" == "foobar "
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# see issue #7933
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var str = "abc"
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doAssert fmt">7.1 :: {str:>7.1}" == ">7.1 :: a"
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doAssert fmt">7.2 :: {str:>7.2}" == ">7.2 :: ab"
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doAssert fmt">7.3 :: {str:>7.3}" == ">7.3 :: abc"
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doAssert fmt">7.9 :: {str:>7.9}" == ">7.9 :: abc"
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doAssert fmt">7.0 :: {str:>7.0}" == ">7.0 :: "
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doAssert fmt" 7.1 :: {str:7.1}" == " 7.1 :: a "
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doAssert fmt" 7.2 :: {str:7.2}" == " 7.2 :: ab "
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doAssert fmt" 7.3 :: {str:7.3}" == " 7.3 :: abc "
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doAssert fmt" 7.9 :: {str:7.9}" == " 7.9 :: abc "
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doAssert fmt" 7.0 :: {str:7.0}" == " 7.0 :: "
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doAssert fmt"^7.1 :: {str:^7.1}" == "^7.1 :: a "
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doAssert fmt"^7.2 :: {str:^7.2}" == "^7.2 :: ab "
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doAssert fmt"^7.3 :: {str:^7.3}" == "^7.3 :: abc "
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doAssert fmt"^7.9 :: {str:^7.9}" == "^7.9 :: abc "
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doAssert fmt"^7.0 :: {str:^7.0}" == "^7.0 :: "
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str = "äöüe\u0309\u0319o\u0307\u0359"
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doAssert fmt"^7.1 :: {str:^7.1}" == "^7.1 :: ä "
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doAssert fmt"^7.2 :: {str:^7.2}" == "^7.2 :: äö "
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doAssert fmt"^7.3 :: {str:^7.3}" == "^7.3 :: äöü "
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doAssert fmt"^7.0 :: {str:^7.0}" == "^7.0 :: "
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# this is actually wrong, but the unicode module has no support for graphemes
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doAssert fmt"^7.4 :: {str:^7.4}" == "^7.4 :: äöüe "
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doAssert fmt"^7.9 :: {str:^7.9}" == "^7.9 :: äöüe\u0309\u0319o\u0307\u0359"
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# see issue #7932
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doAssert fmt"{15:08}" == "00000015" # int, works
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doAssert fmt"{1.5:08}" == "000001.5" # float, works
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doAssert fmt"{1.5:0>8}" == "000001.5" # workaround using fill char works for positive floats
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doAssert fmt"{-1.5:0>8}" == "0000-1.5" # even that does not work for negative floats
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doAssert fmt"{-1.5:08}" == "-00001.5" # works
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doAssert fmt"{1.5:+08}" == "+00001.5" # works
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doAssert fmt"{1.5: 08}" == " 00001.5" # works
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# only add explicitly requested sign if value != -0.0 (neg zero)
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doAssert fmt"{-0.0:g}" == "-0"
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doassert fmt"{-0.0:+g}" == "-0"
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doassert fmt"{-0.0: g}" == "-0"
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doAssert fmt"{0.0:g}" == "0"
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doAssert fmt"{0.0:+g}" == "+0"
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doAssert fmt"{0.0: g}" == " 0"
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# seq format
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let data1 = [1'i64, 10000'i64, 10000000'i64]
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let data2 = [10000000'i64, 100'i64, 1'i64]
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doAssert fmt"data1: {data1:8} ∨" == "data1: [ 1, 10000, 10000000] ∨"
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doAssert fmt"data2: {data2:8} ∧" == "data2: [10000000, 100, 1] ∧"
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# custom format Value
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type
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Vec2[T] = object
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x,y: T
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Vec2f = Vec2[float32]
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Vec2i = Vec2[int32]
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proc formatValue[T](result: var string; value: Vec2[T]; specifier: string) =
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result.add '['
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result.formatValue value.x, specifier
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result.add ", "
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result.formatValue value.y, specifier
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result.add "]"
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let v1 = Vec2f(x:1.0, y: 2.0)
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let v2 = Vec2i(x:1, y: 1337)
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doAssert fmt"v1: {v1:+08} v2: {v2:>4}" == "v1: [+0000001, +0000002] v2: [ 1, 1337]"
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# issue #7632
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import genericstrformat
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doAssert works(5) == "formatted 5"
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doAssert fails0(6) == "formatted 6"
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doAssert fails(7) == "formatted 7"
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doAssert fails2[0](8) == "formatted 8"
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