Moved new implementation out of test/ folder

1 files changed, 58 insertions, 0 deletions

diff --git a/scalatexApi/src/main/scala/torimatomeru/syntax/Literals.scala b/scalatexApi/src/main/scala/torimatomeru/syntax/Literals.scala
new file mode 100644
index 0000000..be6f171
--- /dev/null
+++ b/scalatexApi/src/main/scala/torimatomeru/syntax/Literals.scala
@@ -0,0 +1,58 @@
+package torimatomeru
+package syntax
+
+import org.parboiled2._
+
+trait Literals extends StringLiterals { self: ScalaSyntax =>
+
+  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(!NewlineS ~ ANY) ~ (NewlineS | EOI)
+  }
+
+  def Literal = rule {
+    (capture(optional("-")) ~ (FloatingPointLiteral | IntegerLiteral) ~> ((sign: String, number) => sign + number)) |
+      BooleanLiteral |
+      CharacterLiteral |
+      StringLiteral |
+      SymbolLiteral |
+      capture("null")
+  }
+}
+
+/**
+ * Placed the string defintions in this trait to isolate them, because they are overly complex.
+ */
+private[syntax] trait StringLiterals { self: Literals with ScalaSyntax =>
+
+  def EscapedChars = rule { '\\' ~ anyOf("rnt\\\"") }
+
+  def SymbolLiteral = rule { ''' ~ capture(PlainId) }
+
+  def CharacterLiteral = rule { ''' ~ capture(UnicodeExcape | EscapedChars | !'\\' ~ CharPredicate.from(isPrintableChar)) ~ ''' }
+
+  def MultiLineChars = rule { zeroOrMore(optional('"') ~ optional('"') ~ noneOf("\"")) }
+  def StringLiteral = rule {
+    ("\"\"\"" ~ capture(MultiLineChars) ~ capture("\"\"\"" ~ zeroOrMore('"')) ~> ((multilineChars: String, quotes) => multilineChars + quotes.dropRight(3))) |
+      ('"' ~ 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
+  }
+}