63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
#pragma once
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#include <string>
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#include <iostream>
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#include "lib_begin.h"
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namespace cgv {
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namespace utils {
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/** representation of a token in a text by two pointers begin and end, that
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point to the first character of the token and behind the last character
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of the token. In this way the two pointers form a range of characters that
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can be used with stl functions. */
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struct CGV_API token
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{
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/// pointers that define the range of characters
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const char* begin, *end;
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/// construct with both pointers set to 0
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token();
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/// construct from character range
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token(const char* _b, const char* _e);
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/// construct from string
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token(const std::string& s);
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/// return the length of the token in number of characters
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size_t get_length() const;
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/// return the length of the token in number of characters
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size_t size() const;
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/// return whether the token is empty
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bool empty() const;
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/// set begin by skipping all instances of the given character set
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void skip(const std::string& skip_chars);
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/// set end by skipping all instances of the given character set
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void reverse_skip(const std::string& skip_chars);
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/// return the i-th character of the token
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char operator [] (unsigned int i) const;
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/// compare to const char*
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bool operator == (const char* s) const;
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/// compare to string
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bool operator == (const std::string& s) const;
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/// compare to const char*
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bool operator != (const char* s) const;
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/// compare to string
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bool operator != (const std::string& s) const;
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};
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/// return the length of the token in number of characters
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inline size_t token::get_length() const { return end-begin; }
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/// return the length of the token in number of characters
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inline size_t token::size() const { return end-begin; }
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/// return whether the token is empty
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inline bool token::empty() const { return begin == end; }
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/// return the i-th character of the token
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inline char token::operator [] (unsigned int i) const { return begin[i]; }
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/// convert to string
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inline std::string to_string(const token& t) { return t.empty()?std::string():std::string(t.begin, t.get_length()); }
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/// stream out operator
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inline std::ostream& operator << (std::ostream& os, const token& t) { if (!t.empty()) os << std::string(t.begin, t.get_length()); return os; }
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}
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}
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#include <cgv/config/lib_end.h> |