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67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
#include <Core/Core.h>
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static bool sMatchOr(CParser& p, const Index<String>& flag);
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static bool sMatchFlag(CParser& p, const Index<String>& flag)
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{
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if(p.Char('!'))
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return !sMatchFlag(p, flag);
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if(p.Char('(')) {
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bool b = sMatchOr(p, flag);
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p.PassChar(')');
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return b;
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}
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if(p.IsEof())
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return true;
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return flag.Find(p.ReadId()) >= 0;
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}
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static bool sMatchAnd(CParser& p, const Index<String>& flag)
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{
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bool b = sMatchFlag(p, flag);
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while(p.IsId() || p.IsChar('!') || p.IsChar('(') || p.Char2('&', '&') || p.Char('&'))
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b = sMatchFlag(p, flag) && b;
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return b;
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}
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static bool sMatchOr(CParser& p, const Index<String>& flag)
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{
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bool b = sMatchAnd(p, flag);
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while(p.Char2('|', '|') || p.Char('|'))
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b = sMatchFlag(p, flag) || b;
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return b;
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}
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bool MatchExp(const char *exp, const Index<String>& flag)
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{
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CParser p(exp);
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try {
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return sMatchOr(p, flag);
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}
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catch(CParser::Error e) {
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LOG("Invalid When expression: " << exp);
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return false;
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}
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}
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CONSOLE_APP_MAIN
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{
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Index<String> flag;
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flag.Add("A");
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flag.Add("B");
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DUMP(MatchExp("", flag));
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DUMP(MatchExp("A", flag));
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DUMP(MatchExp("A B", flag));
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DUMP(MatchExp("A !B", flag));
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DUMP(MatchExp("A C", flag));
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DUMP(MatchExp("A !C", flag));
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DUMP(MatchExp("A !(C)", flag));
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DUMP(MatchExp("A !(C || D)", flag));
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DUMP(MatchExp("A !(A & B)", flag));
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DUMP(MatchExp("A !(C || B)", flag));
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DUMP(MatchExp("D | (A & B)", flag));
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DUMP(MatchExp("D | (A & C)", flag));
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DUMP(MatchExp("D | (A | C)", flag));
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DUMP(MatchExp("D & !(A & C)", flag));
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DUMP(MatchExp("D & !(A &)", flag));
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}
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