public void One_Of_Works()
{
IRuleParser AlphabetParser()
{
return(Starts
.With
(
The.Word("a"),
The.Word("b"),
The.Word("c"),
The.Word("d")
)
.ReturnsNode("abcd"));
}
IRuleParser AberahamParser()
{
return(Starts
.With
(
The.Word("a"),
The.Word("b"),
The.Word("e"),
The.Word("raham") // laziness
)
.ReturnsNode("aberaham"));
}
var node = new TestNode();
var oneOfParser = Starts
.With
(
One.Of
(
A.Rule <string>(AlphabetParser, t => node.name = t),
A.Rule <string>(AberahamParser, t => node.name = t)
)
)
.ReturnsNode(node);
string src = "a b e raham";
var tokens = new Lexer().ToTokens(src);
var result = oneOfParser.FeedAll(tokens);
var resultNode = result.AssertComplete <TestNode>();
Assert.Equal(node, resultNode);
Assert.Equal("aberaham", resultNode.name);
}