Open source Star Ruler 2 source code!

2018-07-17 14:15:37 +02:00
commit cc307720ff
4342 changed files with 2365070 additions and 0 deletions
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+#pragma once
+#include <string>
+
+typedef double varInterpreter(void*,const std::string*);
+typedef double varIndexInterpreter(void*,int);
+typedef int varIndexConverter(const std::string*);
+double nullConverter(void*,const std::string*);
+
+struct FormulaError {
+	std::string msg;
+	FormulaError(const char* message) : msg(message) {}
+	FormulaError(std::string message) : msg(message) {}
+};
+
+class Formula {
+public:
+	//Evaluates the formula
+	//Variables in the formula will be passed to <VarConverter>, which receives
+	//the name of the variable, and the <UserPointer> passed to evaluate
+	virtual double evaluate(varInterpreter VarConverter = nullConverter, void* UserPointer = nullptr, varIndexInterpreter VarIndexConverter = 0) = 0;
+	virtual ~Formula() {}
+
+	//Creates a formula from infix notation
+	//Can throw FormulaError if there is an error in the expression
+	static Formula* fromInfix(const char* expression, varIndexConverter VarConverter = 0, bool catchErrors = true);
+};
+;