54 lines
1.2 KiB
Rust
Executable File
54 lines
1.2 KiB
Rust
Executable File
/// Whether `c` is between `0-9`
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pub fn is_digit(c: char) -> bool {
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'0' <= c && c <= '9'
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}
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/// Whether `c` is between `a-fA-F`
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pub fn is_hex_digit(c: char) -> bool {
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is_digit(c) || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F'
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}
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/// Joins a String and a char
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pub fn str_append(current: String, c: char) -> String {
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format!("{}{}", current, c)
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}
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/// Whether `c` is an operator char.
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pub fn is_operator(c: char) -> bool {
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c == '+'
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|| c == '-'
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|| c == '='
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|| c == '*'
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|| c == '!'
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|| c == '\\'
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|| c == '/'
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|| c == '|'
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|| c == '@'
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|| c == '#'
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|| c == '$'
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|| c == '~'
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|| c == '%'
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|| c == '&'
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|| c == '?'
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|| c == '<'
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|| c == '>'
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|| c == '^'
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|| c == '.'
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|| c == ':'
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}
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/// Whether `c` is between `a-z`
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pub fn is_lowercase(c: char) -> bool {
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c >= 'a' && c <= 'z'
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}
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/// Whether `c` is between `A-Z`
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pub fn is_uppercase(c: char) -> bool {
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c >= 'A' && c <= 'Z'
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}
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/// Whether `c` is between `a-zA-Z_0-9`
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pub fn is_identifier_char(c: char) -> bool {
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is_lowercase(c) || is_uppercase(c) || c == '_' || is_digit(c)
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}
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