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string: add is_upper/is_lower and fix parser.match_expr error

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* string: add is_upper/is_lower and fix parser.match_expr error

* to_capital => capitalize, to_title => title

* is_titled => is_title, is_capitalized => is_capital
This commit is contained in:
yuyi
2020-04-12 18:09:05 +08:00
committed by GitHub
parent db2c656da8
commit 0ced7116b6
3 changed files with 100 additions and 37 deletions
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40
vlib/builtin/string.v
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@ -744,6 +744,15 @@ pub fn (s string) to_lower() string {
return tos(b, s.len)
}
pub fn (s string) is_lower() bool {
for i in 0..s.len {
if s[i] >= `A` && s[i] <= `Z` {
return false
}
}
return true
}
pub fn (s string) to_upper() string {
mut b := malloc(s.len + 1)
for i in 0..s.len {
@ -752,6 +761,15 @@ pub fn (s string) to_upper() string {
return tos(b, s.len)
}
pub fn (s string) is_upper() bool {
for i in 0..s.len {
if s[i] >= `a` && s[i] <= `z` {
return false
}
}
return true
}
pub fn (s string) capitalize() string {
if s.len == 0 {
return ''
@ -761,6 +779,18 @@ pub fn (s string) capitalize() string {
return cap
}
pub fn (s string) is_capital() bool {
if s.len == 0 || !(s[0] >= `A` && s[0] <= `Z`) {
return false
}
for i in 1..s.len {
if s[i] >= `A` && s[i] <= `Z` {
return false
}
}
return true
}
pub fn (s string) title() string {
words := s.split(' ')
mut tit := []string
@ -771,6 +801,16 @@ pub fn (s string) title() string {
return title
}
pub fn (s string) is_title() bool {
words := s.split(' ')
for word in words {
if !word.is_capital() {
return false
}
}
return true
}
// 'hey [man] how you doin'
// find_between('[', ']') == 'man'
pub fn (s string) find_between(start, end string) string {