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java.lang.ObjectJFlex.SemCheck
public final class SemCheck
Performs simple semantic analysis on regular expressions.
Constructor Summary | |
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SemCheck()
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Method Summary | |
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static void |
check(RegExps rs,
Macros m,
java.io.File f)
Performs semantic analysis for all expressions. |
static boolean |
isFiniteChoice(RegExp re)
Returns true iff the expression is a finite choice of fixed length expressions. |
static int |
length(RegExp re)
Returns length if expression has fixed length, -1 otherwise. |
static boolean |
maybeEmtpy(RegExp re)
Checks if the expression potentially matches the empty string. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public SemCheck()
Method Detail |
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public static void check(RegExps rs, Macros m, java.io.File f)
rs
- the reg exps to be checkedm
- the macro table (in expanded form)f
- the spec file containing the rulespublic static boolean maybeEmtpy(RegExp re)
public static int length(RegExp re)
public static boolean isFiniteChoice(RegExp re)
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