public void Array(string input, int arrayDimension, DescriptorTokenKind tokenKind)
{
var lexer = new DescriptorLexer(input.AsMemory());
var tokens = Utils.GetAllTokens(lexer.Lex());
Assert.Equal(2 + arrayDimension, tokens.Count);
Assert.Equal(tokenKind, tokens[arrayDimension].Kind);
}
private static void Commence(string input, DescriptorTokenKind tokenKind)
{
var lexer = new DescriptorLexer(input.AsMemory());
var tokens = Utils.GetAllTokens(lexer.Lex());
Assert.Equal(2, tokens.Count);
Assert.True(tokens[0].Kind == tokenKind, $"Expected <{tokenKind}>, but got <{tokens[0].Kind}>.");
}
private static void Commence(string input, DescriptorTokenKind tokenKind, int tokenKindCount)
{
var lexer = new DescriptorLexer(input.AsMemory());
var tokens = Utils.GetAllTokens(lexer.Lex());
Assert.Equal(1 + tokenKindCount, tokens.Count);
Assert.All(tokens, token =>
{
var type = token.Kind;
Assert.True(type == tokenKind || type == DescriptorTokenKind.EndOfFile);
});
}
/// <summary>
/// Creates a new <see cref="DescriptorToken"/>.
/// </summary>
/// <param name="span">The <see cref="TextSpan"/> indicating the start and the end positions.</param>
/// <param name="kind">The type of the token.</param>
/// <param name="value">The raw text.</param>
public DescriptorToken(TextSpan span, DescriptorTokenKind kind, ReadOnlyMemory <char> value)
{
Span = span;
Kind = kind;
Value = value;
}
/// <summary>
/// Throws a <see cref="DescriptorParserException"/> with an unexpected token message.
/// </summary>
/// <param name="token">The <see cref="DescriptorToken"/> that wasn't expected.</param>
/// <param name="expected">The token that was expected.</param>
public static void ThrowUnexpectedToken(DescriptorToken token, DescriptorTokenKind expected) =>
throw new DescriptorParserException($"Unexpected token <{token.Kind}>, expected <{expected}>.");