File: isbra.doc

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\DOC isbra

\TYPE {isbra : string -> bool}

\SYNOPSIS
Tests if a one-character string is some kind of bracket.

\DESCRIBE
The call {isbra s} tests whether the first character of string {s} (normally 
it is the only character) is a bracket, meaning an opening or closing 
parenthesis, square bracket or curly brace.

\FAILURE
Fails if the string is empty.            

\SEEALSO
isalnum, isalpha, isnum, issep, isspace, issymb.

\ENDDOC