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6851d40 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | // RUN: %verify "%s"
/*******************************************************************************
* Copyright by the contributors to the Dafny Project
* SPDX-License-Identifier: MIT
*******************************************************************************/
include "../../src/Unicode/Utf16EncodingForm.dfy"
module Utf16EncodingFormExamples {
import Unicode
import opened Utf16EncodingForm
const TEST_SCALAR_VALUES: seq<(Unicode.ScalarValue, WellFormedCodeUnitSeq)> := [
// One code unit: dollar sign
(0x0024, [0x0024]),
// Two code units: money bag emoji
(0x1F4B0, [0xD83D, 0xDCB0])
]
lemma TestEncodeScalarValue()
ensures forall pair | pair in TEST_SCALAR_VALUES
:: EncodeScalarValue(pair.0) == pair.1
{}
// Because surrogate code points are not Unicode scalar values, isolated UTF-16 code units in the range
// D800_16 .. DFFF_16 are ill-formed. (Section 3.9 D91)
const TEST_ILL_FORMED_SEQUENCES: seq<CodeUnitSeq> := [
[0xD800],
[0xDABC],
[0xDFFF]
]
lemma TestDecodeIllFormedSequence()
ensures forall s | s in TEST_ILL_FORMED_SEQUENCES
:: DecodeCodeUnitSequenceChecked(s).None?
{}
}
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