Compiler/AST interpreter: Difference between revisions
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case class LeafNode(name: String, value: String) extends Node |
case class LeafNode(name: String, value: String) extends Node |
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case object TerminalNode extends Node |
case object TerminalNode extends Node |
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} |
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</lang> |
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The above code depends on the function <tt>unescape()</tt> to perform string escape sequence translation. That function is defined in the following separate source file. |
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<lang scala> |
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package xyz.hyperreal |
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import java.io.ByteArrayOutputStream |
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package object rosettacodeCompiler { |
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val escapes = "\\\\b|\\\\f|\\\\t|\\\\r|\\\\n|\\\\\\\\|\\\\\"" r |
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def unescape(s: String) = |
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escapes.replaceAllIn(s, _.matched match { |
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case "\\b" => "\b" |
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case "\\f" => "\f" |
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case "\\t" => "\t" |
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case "\\r" => "\r" |
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case "\\n" => "\n" |
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case "\\\\" => "\\" |
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case "\\\"" => "\"" |
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}) |
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def capture(thunk: => Unit) = { |
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val buf = new ByteArrayOutputStream |
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Console.withOut(buf)(thunk) |
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buf.toString |
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} |
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} |
} |
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