private SyntaxNode ReadParenthesizedExpression()
{
tokens.AssertCanRead();
tokens.AssertNextIsTypeOf(TokenType.LeftParentheses);
SyntaxNode expression = ReadExpression();
tokens.AssertCanRead();
tokens.AssertNextIsTypeOf(TokenType.RightParentheses);
return(new ParenthesesNode(expression));
}
public void AssertNextIsTypeOf_AdditionToken_ThrowsException()
{
Tokens tokens = new Tokens(new List <Token> {
new Token(TokenType.Addition)
});
Assert.Throws <UnexpectedTokenException>(() => tokens.AssertNextIsTypeOf(TokenType.Subtraction));
}
