diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 11 |
1 files changed, 8 insertions, 3 deletions
@@ -12689,9 +12689,14 @@ style parameter list <macro-style-params>. If the object produced by <expr> matches <macro-style-params>, then the parameters are bound, becoming local variables, and the <form>-s, if any, are -evaluated in order in the environment in which those variables are visible. The -evaluation of tree-case then ends, returning the value of the last <form>, or -else nil if there are no forms. +evaluated in order in the environment in which those variables are visible. + +If there are forms, the value of the last <form> becomes the result value of +the case, otherwise the result value of the case is nil. + +If the result value of a case is the object : (the colon symbol), then +processing continues with the next case. Otherwise the evaluation of tree-case +terminates, returning the result value. If the value of <expr> does not match the <macro-style-params> parameter list, then the usual exception is thrown; instead, processing continues |