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52 lines
1.3 KiB
52 lines
1.3 KiB
// Symbols.
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#ifndef _CL_SYMBOL_H
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#define _CL_SYMBOL_H
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#include "cln/string.h"
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namespace cln {
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// Symbols are just strings, uniquified through a global hash table.
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#if (defined(__alpha__) && !defined(__GNUC__))
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struct hashuniq;
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#endif
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struct cl_symbol : public cl_rcpointer {
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public:
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// Conversion to string.
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operator cl_string () const;
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// Constructors.
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cl_symbol (const cl_string&); // create or lookup a symbol from its name
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cl_symbol (const cl_symbol&);
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// Assignment operators.
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cl_symbol& operator= (const cl_symbol&);
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// Private pointer manipulations.
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cl_symbol (cl_private_thing p) : cl_rcpointer (p) {}
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public: /* ugh */
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// Create a new symbol given its name.
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cl_symbol (struct hashuniq * null, const cl_string& s);
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};
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CL_DEFINE_COPY_CONSTRUCTOR2(cl_symbol,cl_rcpointer)
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CL_DEFINE_ASSIGNMENT_OPERATOR(cl_symbol,cl_symbol)
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// A symbol points to a string, so to convert cl_symbol -> cl_string, we just
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// take the pointer and put it into a cl_string.
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inline cl_symbol::operator cl_string () const
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{
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return cl_string(_as_cl_private_thing());
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}
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// Comparison.
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inline bool equal (const cl_symbol& s1, const cl_symbol& s2)
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{
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return (s1.pointer == s2.pointer);
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}
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// Hash code.
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extern unsigned long hashcode (const cl_symbol& s);
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} // namespace cln
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#endif /* _CL_SYMBOL_H */
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