如何查找与Rebol中的模式匹配的所有子字符串

Question

在这里,我试图在字符串中找到模式的所有匹配项:

theString: "There is a blue truck and a red car next to an orange building."
thePattern: [["blue" | "red" | "orange"] ["truck" | "car" | "building"]]
print parse thePattern theString

["red truck" "blue car" "orange building"]该parse函数返回而不是返回false.

Rebol是否有任何函数可用于查找字符串中模式的所有匹配,类似于其他编程语言的正则表达式匹配函数？

Answer 1

你可以试试这个:

string: "There is a blue truck and a red car next to an orange building."
pattern: [
    ["blue" | "red" | "orange"] 
    space
    ["truck" | "car" | "building"]
]

parse string [
    some [
        copy value pattern (print value)
    |   skip    
    ]
]

打印:

blue truck
red car
orange building

skip用于在模式不匹配时移动到下一个字符.此外,还会在模式中添加空间,因为它不是"bluetruck"或"redcar".

括号用于在解析规则中执行Rebol代码,因此您可以替换print其他内容(如append block value等)