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/*
* ExpressionParser.h
*
* Created on: 6 Mar 2020
* Author: David
*/
#ifndef SRC_GCODES_GCODEBUFFER_EXPRESSIONPARSER_H_
#define SRC_GCODES_GCODEBUFFER_EXPRESSIONPARSER_H_
#include <RepRapFirmware.h>
#include <General/StringBuffer.h>
#include <ObjectModel/ObjectModel.h>
#include <GCodes/GCodeException.h>
class ExpressionParser
{
public:
ExpressionParser(const GCodeBuffer& p_gb, const char *text, const char *textLimit, int p_column = -1) noexcept;
ExpressionValue Parse(bool evaluate = true) THROWS(GCodeException);
bool ParseBoolean() THROWS(GCodeException);
float ParseFloat() THROWS(GCodeException);
int32_t ParseInteger() THROWS(GCodeException);
uint32_t ParseUnsigned() THROWS(GCodeException);
void SkipWhiteSpace() noexcept;
void CheckForExtraCharacters() THROWS(GCodeException);
const char *GetEndptr() const noexcept { return currentp; }
private:
GCodeException ConstructParseException(const char *str) const noexcept;
GCodeException ConstructParseException(const char *str, const char *param) const noexcept;
GCodeException ConstructParseException(const char *str, uint32_t param) const noexcept;
ExpressionValue ParseInternal(bool evaluate = true, uint8_t priority = 0) THROWS(GCodeException);
ExpressionValue ParseExpectKet(bool evaluate, char expectedKet) THROWS(GCodeException);
ExpressionValue ParseNumber() noexcept
pre(readPointer >= 0; isdigit(gb.buffer[readPointer]));
ExpressionValue ParseIdentifierExpression(bool evaluate, bool applyLengthOperator) THROWS(GCodeException)
pre(readPointer >= 0; isalpha(gb.buffer[readPointer]));
void ParseQuotedString(const StringRef& str) THROWS(GCodeException);
void ConvertToFloat(ExpressionValue& val, bool evaluate) const THROWS(GCodeException);
void ConvertToBool(ExpressionValue& val, bool evaluate) const THROWS(GCodeException);
void ConvertToString(ExpressionValue& val, bool evaluate) THROWS(GCodeException);
void BalanceNumericTypes(ExpressionValue& val1, ExpressionValue& val2, bool evaluate) const THROWS(GCodeException);
void BalanceTypes(ExpressionValue& val1, ExpressionValue& val2, bool evaluate) THROWS(GCodeException);
void EnsureNumeric(ExpressionValue& val, bool evaluate) const THROWS(GCodeException);
static bool TypeHasNoLiterals(TypeCode t) noexcept;
const char *GetAndFix() THROWS(GCodeException);
int GetColumn() const noexcept;
char CurrentCharacter() const noexcept;
void AdvancePointer() noexcept { ++currentp; } // could check that we havebn't reached endp but we should stop before that happens
const char *currentp;
const char * const startp;
const char * const endp;
const GCodeBuffer& gb;
int column;
char stringBufferStorage[StringBufferLength];
StringBuffer stringBuffer;
String<MaxVariableNameLength> obsoleteField;
};
#endif /* SRC_GCODES_GCODEBUFFER_EXPRESSIONPARSER_H_ */
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