Category talk:Wren-pattern: Difference between revisions

Line 515:

// Private worker method.

// Looks for a pattern match ~~for~~ ~~the~~ ~~string~~ 's' starting from ~~codepoint~~ index 'start'.

// Looks for a pattern match from a list of codepoints, 'codes', starting from index 'start'.

// 'sc' is the number of codepoints in 'codes'.

// Returns a Match object if a match is found or null otherwise.

match_(s, start) {

match_(codes, start, sc) {

var tokens = _tokens.toList // use a copy as we might change it

var tc = tokens.count // tokens length

var ti = 0 // tokens index

var t = tokens[ti] // current token

⚫

var codes = s.codePoints.toList ~~// string codepoints~~

var sc = s.count // string codepoints count

var si = start // string codepoints index

var c = -1 // string current codepoint

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Line 843:

find(s) {

if (!(s is String)) Fiber.abort("Argument must be a string.")

var sc = s.~~count~~

var codes = s.codePoints.toList

⚫

var sc = codes.count

if (sc < _minLen) return null

if (_type == Pattern.within) {

var maxStart = sc - _minLen

for (start in 0..maxStart) {

var m = match_(s, start)

var m = match_(codes, start, sc)

if (m) return m

}

return null

}

if (_type == Pattern.start) return match_(s, 0)

if (_type == Pattern.start) return match_(codes, 0, sc)

if (_type == Pattern.end) {

var maxStart = sc - _minLen

for (start in 0..maxStart) {

var m = match_(s, start)

var m = match_(codes, start, sc)

if (m && ((start + m.length) == sc)) return m

}

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}

if (_type == Pattern.whole) {

var m = match_(s, 0)

var m = match_(codes, 0, sc)

if (!m || m.length < sc) return null

return m

Line 880:

}

if (!m) return []

⚫

var sc = s.count

var matches = [m]

if (m.length == 0) return matches

⚫

var codes = s.codePoints.toList

var sc = codes.count

var start = m.index + m.length

while (start + _minLen <= sc) {

m = match_(s, start)

m = match_(codes, start, sc)

if (m) {

matches.add(m)