/* * Arduino JSON library * Benoit Blanchon 2014 - MIT License */ #pragma once #include "EscapedString.h" #include "Printable.h" #include "StringBuilder.h" namespace ArduinoJson { namespace Generator { class JsonValue { public: void operator=(bool value) { printToImpl = &printBoolTo; content.asBool = value; } void operator=(long value) { printToImpl = &printLongTo; content.asLong = value; } void operator=(int value) { printToImpl = &printLongTo; content.asLong = value; } void operator=(const Printable& value) { printToImpl = &printPrintableTo; content.asPrintable = &value; } void operator=(const char* value) { printToImpl = &printStringTo; content.asString = value; } void operator=(double value) { set<2>(value); } template void set(double value) { printToImpl = &printDoubleTo < DIGITS > ; content.asDouble = value; } operator bool() { return content.asBool; } operator const char*() { return content.asString; } operator double() { return content.asDouble; } operator float() { return (float)content.asDouble; } operator int() { return content.asLong; } operator long() { return content.asLong; } operator const Printable&() { return *content.asPrintable; } size_t printTo(Print& p) const { // handmade polymorphism return printToImpl(content, p); } void reset() { content.asDouble = 0; printToImpl = printStringTo; } private: union Content { bool asBool; double asDouble; long asLong; const Printable* asPrintable; const char* asString; }; Content content; size_t(*printToImpl)(const Content&, Print&); static size_t printBoolTo(const Content&, Print&); static size_t printLongTo(const Content&, Print&); static size_t printPrintableTo(const Content&, Print&); static size_t printStringTo(const Content&, Print&); template static size_t printDoubleTo(const Content& c, Print& p) { return p.print(c.asDouble, DIGITS); } }; } }