diff options
Diffstat (limited to 'scalatexApi/src/main/scala/scalaparser/syntax/Literals.scala')
-rw-r--r-- | scalatexApi/src/main/scala/scalaparser/syntax/Literals.scala | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/scalatexApi/src/main/scala/scalaparser/syntax/Literals.scala b/scalatexApi/src/main/scala/scalaparser/syntax/Literals.scala new file mode 100644 index 0000000..11eb943 --- /dev/null +++ b/scalatexApi/src/main/scala/scalaparser/syntax/Literals.scala @@ -0,0 +1,56 @@ +package scalaparser +package syntax +import acyclic.file +import org.parboiled2._ + +trait Literals { self: Parser with Basic with Identifiers => + object Literals{ + import Basic._ + def FloatingPointLiteral = rule { + capture( + "." ~ oneOrMore(Digit) ~ optional(ExponentPart) ~ optional(FloatType) | + oneOrMore(Digit) ~ ( + "." ~ oneOrMore(Digit) ~ optional(ExponentPart) ~ optional(FloatType) | + ExponentPart ~ optional(FloatType) | + optional(ExponentPart) ~ FloatType)) + } + + def IntegerLiteral = rule { capture((DecimalNumeral | HexNumeral) ~ optional(anyOf("Ll"))) } + + def BooleanLiteral = rule { capture("true" | "false") } + + def MultilineComment: Rule0 = rule { "/*" ~ zeroOrMore(MultilineComment | !"*/" ~ ANY) ~ "*/" } + def Comment: Rule0 = rule { + MultilineComment | + "//" ~ zeroOrMore(!Basic.Newline ~ ANY) ~ (Basic.Newline | EOI) + } + + def Literal = rule { + (capture(optional("-")) ~ (FloatingPointLiteral | IntegerLiteral) ~> ((sign: String, number) => sign + number)) | + BooleanLiteral | + CharacterLiteral | + StringLiteral | + SymbolLiteral | + capture("null") + } + + + def EscapedChars = rule { '\\' ~ anyOf("rnt\\\"") } + + def SymbolLiteral = rule { ''' ~ capture(Identifiers.PlainId) } + + def CharacterLiteral = rule { ''' ~ capture(UnicodeExcape | EscapedChars | !'\\' ~ CharPredicate.from(isPrintableChar)) ~ ''' } + + def MultiLineChars = rule { zeroOrMore(optional('"') ~ optional('"') ~ noneOf("\"")) } + def StringLiteral = rule { + (optional(Identifiers.Id) ~ "\"\"\"" ~ capture(MultiLineChars) ~ capture("\"\"\"" ~ zeroOrMore('"')) ~> ((multilineChars: String, quotes) => multilineChars + quotes.dropRight(3))) | + (optional(Identifiers.Id) ~ '"' ~ capture(zeroOrMore("\\\"" | noneOf("\n\""))) ~ '"') + } + + def isPrintableChar(c: Char): Boolean = { + val block = Character.UnicodeBlock.of(c) + !Character.isISOControl(c) && !Character.isSurrogate(c) && block != null && block != Character.UnicodeBlock.SPECIALS + } + } +} + |