Added lookaround-related fields to postfixNode struct
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@@ -15,15 +15,23 @@ const (
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RPAREN
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)
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// Helper constants for lookarounds
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const POSITIVE = 1
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const NEGATIVE = -1
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const LOOKAHEAD = 1
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const LOOKBEHIND = -1
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var INFINITE_REPS int = -1 // Represents infinite reps eg. the end range in {5,}
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// This represents a node in the postfix representation of the expression
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type postfixNode struct {
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nodetype NodeType
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contents []rune // Contents of the node - the length of this would only be >1 if the node represents a character class
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startReps int // Minimum number of times the node should be repeated - used with numeric specifiers
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endReps int // Maximum number of times the node should be repeated - used with numeric specifiers
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allChars bool // Whether or not the current node represents all characters (eg. dot metacharacter)
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except []rune // For inverted character classes, we match every unicode character _except_ a few. In this case, allChars is true and the exceptions are placed here.
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nodetype NodeType
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contents []rune // Contents of the node
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startReps int // Minimum number of times the node should be repeated - used with numeric specifiers
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endReps int // Maximum number of times the node should be repeated - used with numeric specifiers
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allChars bool // Whether or not the current node represents all characters (eg. dot metacharacter)
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except []rune // For inverted character classes, we match every unicode character _except_ a few. In this case, allChars is true and the exceptions are placed here.
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lookaroundSign int // ONLY USED WHEN nodetype == ASSERTION. Whether we have a positive or negative lookaround.
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lookaroundDir int // Lookbehind or lookahead
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}
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// Creates a new escaped node - the given character is assumed to have been preceded by a backslash
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