我正在尝试使用 treetop 编写一个解析器来将一些乳胶命令解析为 HTML 标记。通过以下内容,我在生成的代码中得到了一个死角。我已经构建了源代码tt
并逐步完成,但它并没有真正阐明根本问题是什么(它只是在_nt_paragraph中旋转)
Test input: "\emph{hey} and some more text."
grammar Latex
rule document
(paragraph)* {
def content
[:document, elements.map { |e| e.content }]
end
}
end
# Example: There aren't the \emph{droids you're looking for} \n\n.
rule paragraph
( text / tag )* eop {
def content
[:paragraph, elements.map { |e| e.content } ]
end
}
end
rule text
( !( tag_start / eop) . )* {
def content
[:text, text_value ]
end
}
end
# Example: \tag{inner_text}
rule tag
"\\emph{" inner_text '}' {
def content
[:tag, inner_text.content]
end
}
end
# Example: \emph{inner_text}
rule inner_text
( !'}' . )* {
def content
[:inner_text, text_value]
end
}
end
# End of paragraph.
rule eop
newline 2.. {
def content
[:newline, text_value]
end
}
end
rule newline
"\n"
end
# You know, what starts a tag
rule tag_start
"\\"
end
end