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b687c3ce9c
Add new builtins(by generalizing, renaming, and extending the builtins used for compile time integer literal checking). These new builtins truncate integers and check for overflow/truncation errors at runtime. Use these for FixedPoint conversion constructors. Fix a routine in stdlib's String implementation and a test that relied on bitwise behavior of the constructors (and triggered overflows). TODO: - Teach CCP about these to get static checking. - Add special builtins for same size signed <-> unsigned conversions. Swift SVN r10432
31 lines
663 B
Swift
31 lines
663 B
Swift
// RUN: %swift -i %s
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// REQUIRES: swift_interpreter
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// Unsigned to signed truncation.
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var maxInt8_u16 : UInt16 = 127
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Int8(maxInt8_u16)
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var maxInt8_u64 : UInt64 = 127
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Int8(maxInt8_u64)
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var zero_u16 : UInt16 = 0
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Int8(zero_u16)
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// Unsigned to unsigned truncation.
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var maxUInt16_u32 : UInt32 = 0xFFFF
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var small_u32 : UInt32 = 0xF
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UInt16(maxUInt16_u32)
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UInt16(zero_u16)
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UInt16(small_u32)
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// Signed to unsigned truncation.
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var maxUInt16_i64 : Int64 = 0xFFFF
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UInt16(maxUInt16_i64)
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var small_u16 : Int16 = 0xF
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UInt8(small_u16)
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// Signed to signed truncation.
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var minInt8_i64 : Int64 = -128
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Int8(minInt8_i64)
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Int16(minInt8_i64)
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var zero_i64 : Int64 = 0
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Int8(zero_i64)
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