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November 12, 2025 22:37
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MessageFormat example with ICU 78
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| #define U_DISABLE_RENAMING 1 | |
| #include <unicode/messageformat2.h> | |
| #include <iostream> | |
| #include <unicode/unistr.h> | |
| #include <unicode/ustream.h> | |
| using namespace std; | |
| using namespace icu; | |
| using namespace message2; | |
| bool testMessageFormat() { | |
| UErrorCode errorCode = U_ZERO_ERROR; | |
| UParseError parseError; | |
| MessageFormatter::Builder builder(errorCode); | |
| MessageFormatter mf = builder.setPattern(u".input {$userNumber :number} .match $userNumber * {{Hello, {$userNumber}!}}", parseError, errorCode) | |
| .build(errorCode); | |
| if (U_FAILURE(errorCode)) { | |
| cout << "Syntax failed: "; | |
| cout << u_errorName(errorCode); | |
| } | |
| std::map<UnicodeString, message2::Formattable> argMap; | |
| argMap["userNumber"] = message2::Formattable(42.0); | |
| MessageArguments args(argMap, errorCode); | |
| if (U_FAILURE(errorCode)) { | |
| cout << "Constructing args map failed: "; | |
| cout << u_errorName(errorCode); | |
| } | |
| UnicodeString result = mf.formatToString(args, errorCode); | |
| if (U_FAILURE(errorCode)) { | |
| cout << "Formatting failed: "; | |
| cout << u_errorName(errorCode); | |
| } | |
| UnicodeString expected("Hello, 42!"); | |
| u16string_view expectedS(expected); | |
| u16string_view resultS(result); | |
| if (result != expected) { | |
| cout << "Wrong result! Expected: "; | |
| cout << expected; | |
| cout << "Got: "; | |
| cout << result; | |
| } | |
| return (result == expected); | |
| } | |
| int main() { | |
| return testMessageFormat() ? 0 : 1; | |
| } |
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