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author | lihaoyi <haoyi.sg@gmail.com> | 2014-11-24 02:48:13 -0800 |
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committer | lihaoyi <haoyi.sg@gmail.com> | 2014-11-24 02:48:13 -0800 |
commit | 6829fb683e1e0ab3a14272a756af63a1a40ebfd7 (patch) | |
tree | b716835039cf23356d083fb4a97ca4475afe1a90 /scalaParser/src/main/scala/scalaParser/syntax/Basic.scala | |
parent | c6e266f8d0f8d8ce948ddf6b8539e28606e9b009 (diff) | |
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finish move
Diffstat (limited to 'scalaParser/src/main/scala/scalaParser/syntax/Basic.scala')
-rw-r--r-- | scalaParser/src/main/scala/scalaParser/syntax/Basic.scala | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/scalaParser/src/main/scala/scalaParser/syntax/Basic.scala b/scalaParser/src/main/scala/scalaParser/syntax/Basic.scala new file mode 100644 index 0000000..8d3232a --- /dev/null +++ b/scalaParser/src/main/scala/scalaParser/syntax/Basic.scala @@ -0,0 +1,51 @@ +package scalaParser +package syntax +import acyclic.file +import org.parboiled2._ + +trait Basic { self: Parser => + object Basic{ + def UnicodeExcape = rule { "\\u" ~ 4.times(HexDigit) } + + + //Numbers and digits + def HexDigit = rule { Digit | "a" - "f" | "A" - "Z" } + def Digit = rule { "0" | NonZeroDigit } + def NonZeroDigit = rule { "1" - "9" } + def HexNumeral = rule { "0x" ~ oneOrMore(HexDigit) } + def DecimalNumeral = rule(oneOrMore(Digit)) + def ExponentPart = rule { anyOf("Ee") ~ optional(anyOf("+-")) ~ oneOrMore(Digit) } + def FloatType = rule { anyOf("FfDd") } + + def Parentheses = rule { "(" | ")" | "[" | "]" | "{" | "}" } + def DelimiterChar = rule { "'" | "\"" | "." | ";" | "," } + + def WhitespaceChar = rule { "\u0020" | "\u0009" } + def Newline = rule { "\r\n" | "\n" } + def Semi = rule { ';' | oneOrMore(Newline) } + def OperatorChar = rule { + anyOf("""!#$%&*+-/:<=>?@\^|~""") | + CharPredicate.from(_.getType match { + case Character.OTHER_SYMBOL | Character.MATH_SYMBOL => true; case _ => false + }) + } + def Letter = rule { Upper | Lower | CharPredicate.from(c => c.isLetter | c.isDigit) } + def Lower = rule { "a" - "z" | "$" | "_" | CharPredicate.from(_.isLower) } + def Upper = rule { "A" - "Z" | CharPredicate.from(_.isUpper) } + } + /** + * Most keywords don't just require the correct characters to match, + * they have to ensure that subsequent characters *don't* match in + * order for it to be a keyword. This enforces that rule for key-words + * (W) and key-operators (O) which have different non-match criteria. + */ + object Key { + def W(s: String) = rule { + str(s) ~ !(Basic.Letter | Basic.Digit) + } + + def O(s: String) = rule { + str(s) ~ !Basic.OperatorChar + } + } +} |