我试图用下面的EBNF传递一个nuke脚本(foundry.nk文件),但是我似乎在“content”文本中捕获了太多内容。我也很确定我在格式上犯了一些重大的错误。有人能帮我吗?
EBNF:

file           := header, content
header         := shebang, version
shebang        := '#!', ts, word, ('-',[a-zA-Z0-9]+)?,'\n'
version        := 'version', ts, [0-9], '.', [0-9], ts, 'v', [0-9], '\n'
content        := node*
node           := word, ts, '{\n', nodecontent*, '}\n'
nodecontent    := ts, knobname, ts, knobvalue, '\n'
knobname       := word
knobvalue      := word / string / multiknobgroup / knobgroup
knobgroup      := '{', (word / string, ts)*, '}'
multiknobgroup := '{\n', (ts, knobgroup, '\n')*, ts, '}\n'
string         := '"', word*, '"'
word           := ([a-zA-Z0-9-_()/\~.<>?;:])+,ts
ts             := [ \t]*

纽克脚本:
#! /opt/foundry/Nuke/6.3v7-x64/Nuke6.3 -nx
version 6.3 v7
Root {
 inputs 0
 name /path/to/file_name.nk
 first_frame 0
 last_frame 100
 lock_range true
 format "2048 1556 0 0 2048 1556 1 2K_Super_35(full-ap)"
 proxy_type scale
 proxy_format "1024 778 0 0 1024 778 1 1K_Super_35(full-ap)"
 addUserKnob {20 custom l Custom}
 addUserKnob {1 scene l Scene}
 views {
  {left ""}
  {right ""}
 }
}

当前的EBNF阻塞了“views”knobvalue。通过从节点中删除它,我的代码可以按预期工作。我的完整代码在这里:http://pastebin.com/z01RWpqW
谢谢

最佳答案

这是固定声明:

declaration = """
file           := header, content
header         := shebang, version
shebang        := '#!', ts, word, ('-',[a-zA-Z0-9]+)?,'\n'
version        := 'version', ts, [0-9], '.', [0-9], ts, 'v', [0-9], '\n'

content        := node*
node           := word, ts, '{\n', nodecontent*, ts, '}', '\n'*
nodecontent    := ts, knobname, ts, knobvalue, '\n'
knobname       := word
knobvalue      := word / string / multiknobgroup / knobgroup
knobgroup      := '{', (word / string)*, ts, '}'
multiknobgroup :=  '{\n', (ts, knobgroup, '\n')*, ts, '}'
string         := '"', word*, '"'
word           := ([a-zA-Z0-9-_()/\~.<>?;:])+,ts
ts             := [ \t]*
"""

节点可能以结束,所以这就是为什么需要将'\n'*附加到节点定义
不允许multiknobgroup定义以}结尾,因为\n由nodecontent定义(键值)附加,这将导致multiknobgroup与nodecontent不匹配

10-06 04:25