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tokenizers.Chars: remove unused methods #3331

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Sep 11, 2023
Merged

tokenizers.Chars: remove unused methods #3331

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48 changes: 0 additions & 48 deletions scalameta/tokenizers/shared/src/main/scala/scala/meta/internal/tokenizers/Chars.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@ package internal
package tokenizers

import scala.annotation.switch
import java.lang.{Character => JCharacter}
import scala.language.postfixOps

/** Contains constants and classifier methods for characters */
Expand Down Expand Up @@ -33,36 +32,6 @@ object Chars {
if (0 <= num && num < base) num else -1
}

/** Buffer for creating '\ u XXXX' strings. */
private[this] val char2uescapeArray = Array[Char]('\\', 'u', 0, 0, 0, 0)

/** Convert a character to a backslash-u escape */
def char2uescape(c: Char): String = {
@inline def hexChar(ch: Int): Char =
(if (ch < 10) '0' else 'A' - 10) + ch toChar

char2uescapeArray(2) = hexChar((c >> 12))
char2uescapeArray(3) = hexChar((c >> 8) % 16)
char2uescapeArray(4) = hexChar((c >> 4) % 16)
char2uescapeArray(5) = hexChar((c) % 16)

new String(char2uescapeArray)
}

/** Is character a line break? */
def isLineBreakChar(c: Char) = (c: @switch) match {
case LF | FF | CR | SU => true
case _ => false
}

/** Is character a whitespace character (but not a new line)? */
def isWhitespace(c: Char) =
c == ' ' || c == '\t' || c == CR

/** Can character form part of a doc comment variable xxx? */
def isVarPart(c: Char) =
'0' <= c && c <= '9' || 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z'

/** Can character start an alphanumeric Scala identifier? */
@inline def isIdentifierStart(c: Char): Boolean =
(c == '_') || isIdentifierPart(c)
Expand All @@ -81,13 +50,6 @@ object Chars {
chtp == Character.MATH_SYMBOL.toInt || chtp == Character.OTHER_SYMBOL.toInt
}

private final val otherLetters = Set[Char]('\u0024', '\u005F') // '$' and '_'
private final val letterGroups = {
import JCharacter._
Set[Byte](LOWERCASE_LETTER, UPPERCASE_LETTER, OTHER_LETTER, TITLECASE_LETTER, LETTER_NUMBER)
}
def isScalaLetter(ch: Char) = letterGroups(JCharacter.getType(ch).toByte) || otherLetters(ch)

/** Can character form part of a Scala operator name? */
def isOperatorPart(c: Char): Boolean = (c: @switch) match {
case '~' | '!' | '@' | '#' | '%' | '^' | '*' | '+' | '-' | '<' | '>' | '?' | ':' | '=' | '&' |
Expand All @@ -96,16 +58,6 @@ object Chars {
case c => isSpecial(c)
}

/**
* {{{
* (#x20 | #x9 | #xD | #xA)
* }}}
*/
final def isSpace(ch: Char): Boolean = ch match {
case '\u0009' | '\u000A' | '\u000D' | '\u0020' => true
case _ => false
}

/**
* {{{
* NameChar ::= Letter | Digit | '.' | '-' | '_' | ':'
Expand Down