Parsing

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(read-case-sensitive [on?]) gets or sets a Boolean value that controls parsing input symbols. When this parameter's value is #f, the reader always returns downcased symbols (e.g., hi when the input is any one of hi, Hi, HI, or hI).
(read-square-bracket-as-paren [on?]) gets or sets a Boolean value that controls whether square brackets (``['' and ``]'') are treated as parentheses. See section 14.3 for more information.
(read-curly-brace-as-paren [on?]) gets or sets a Boolean value that controls whether curly braces (``{'' and ``}'') are treated as parentheses. See section 14.3 for more information.
(read-accept-box [on?]) gets or sets a Boolean value that controls parsing #& input. See section 14.3 for more information.
(read-accept-compiled [on?]) gets or sets a Boolean value that controls parsing pre-compiled input. See section 14.3 for more information.
(read-accept-bar-quote [on?]) gets or sets a Boolean value that controls parsing and printing a vertical bar ( ) in symbols. See section 14.3 and section 14.4 for more information.
(read-accept-graph [on?]) gets or sets a Boolean value that controls parsing input S-expressions with sharing. See section 14.5 for more information.
(read-decimal-as-inexact [on?]) gets or sets a Boolean value that controls parsing input numbers with a decimal point or exponent (but no explicit exactness tag). See section 14.5 for more information.