32 lines
830 B
Rust
32 lines
830 B
Rust
use std::ops::RangeBounds;
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pub fn is_lnspace(ch: char) -> bool {
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ch == '\t' || ch == ' ' || ch == '\r'
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}
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pub fn is_whitespace(ch: char) -> bool {
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is_lnspace(ch) || ch == '\n'
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}
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pub fn is_digit(ch: char) -> bool {
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('0'..='9').contains(&ch)
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}
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pub fn is_normal_word_constituent(ch: char) -> bool {
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('0'..='9').contains(&ch) || ('a'..='z').contains(&ch) || ('A'..='Z').contains(&ch)
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|| "<>=-_+/|&~!^*".contains(ch)
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}
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pub fn is_normal_word(s: &str) -> bool {
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s.chars().all( is_normal_word_constituent)
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}
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pub fn escape_for_html(s: &str) -> String {
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s.replace("&", "&amd;").replace("<", "<").replace(">", ">")
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.replace("'", "'").replace("\"", """)
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}
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pub fn is_special_name(s: &str) -> bool {
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s.chars().any(|ch| "+'/|&~!^%*".contains(ch)) || s.ends_with("-") || s == "this"
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}
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