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Parse 'var', '_', and 'is' pattern forms at the top level of a matching pattern context. Keep track of VarPatternDepth in the parser state and raise an error if 'var' appears in a 'var'. Swift SVN r5839
31 lines
451 B
Swift
31 lines
451 B
Swift
// RUN: %swift -dump-parse -verify %s
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var x:Int
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func square(x:Int) -> Int { return x*x }
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struct A<B> {
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struct C<D> { }
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}
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switch x {
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// Expressions as patterns.
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case 0:
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case 1 + 2:
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case square(9):
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// 'var' pattern.
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case var a:
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case var var a: // expected-error{{'var' cannot appear nested inside another 'var' pattern}}
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// 'Any' pattern.
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case _:
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// 'is' pattern.
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case is A<B>:
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case is A<B>.C<D>:
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case is (Int, Int):
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case is (a:Int, b:Int):
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}
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