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| -rw-r--r-- | txr.1 | 9 |
1 files changed, 4 insertions, 5 deletions
@@ -46703,11 +46703,10 @@ cannot express the idea of matching a list whose first element is the symbol and whose third element is .codn 42 . Moreover, every position in the tree pattern much specify a variable -which captures the corresponding element of the structure. For instance, -a pattern which matches a three-element list must specify three variables, -one for each list position. This is because macro-style parameter lists are -oriented toward writing macros, and macros usually make use of every parameter -position. +which captures the corresponding element of the structure or else the symbol +.code t +to indicate that no variable is to be captured. There are no other +pattern matching operators. .NP* User-Defined Patterns |