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Diffstat (limited to 'Doc/Zsh/builtins.yo')
| -rw-r--r-- | Doc/Zsh/builtins.yo | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Doc/Zsh/builtins.yo b/Doc/Zsh/builtins.yo index 204b29cf7..169f4f881 100644 --- a/Doc/Zsh/builtins.yo +++ b/Doc/Zsh/builtins.yo @@ -1235,7 +1235,15 @@ tt(test) and tt([) builtins are: these commands are not handled syntactically, so for example an empty variable expansion may cause an argument to be omitted; syntax errors cause status 2 to be returned instead of a shell error; and arithmetic operators expect integer arguments rather -than arithemetic expressions. +than arithmetic expressions. + +The command attempts to implement POSIX and its extensions where these +are specified. Unfortunately there are intrinsic ambiguities in +the syntax; in particular there is no distinction between test operators +and strings that resemble them. The standard attempts to resolve these +for small numbers of arguments (up to four); for five or more arguments +compatibility cannot be relied on. Users are urged wherever possible to +use the `tt([[)' test syntax which does not have these ambiguities. ) findex(times) cindex(shell, timing) |