/*
- * Copyright 2012 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* limitations under the License.
*/
-#include "folly/Format.h"
+#include <folly/Format.h>
-#include <glog/logging.h>
-#include <gflags/gflags.h>
-#include <gtest/gtest.h>
+#include <folly/portability/GTest.h>
-#include "folly/FBVector.h"
-#include "folly/dynamic.h"
-#include "folly/json.h"
+#include <string>
using namespace folly;
-template <class... Args>
-std::string fstr(StringPiece fmt, Args&&... args) {
- return format(fmt, std::forward<Args>(args)...).str();
-}
-
-template <class C>
-std::string vstr(StringPiece fmt, const C& c) {
- return vformat(fmt, c).str();
-}
-
template <class Uint>
void compareOctal(Uint u) {
char buf1[detail::kMaxOctalLength + 1];
char* p = buf1 + detail::uintToOctal(buf1, detail::kMaxOctalLength, u);
char buf2[detail::kMaxOctalLength + 1];
- sprintf(buf2, "%jo", static_cast<uintmax_t>(u));
+ EXPECT_LT(snprintf(buf2, sizeof(buf2), "%jo", static_cast<uintmax_t>(u)),
+ sizeof(buf2));
EXPECT_EQ(std::string(buf2), std::string(p));
}
char* p = buf1 + detail::uintToHexLower(buf1, detail::kMaxHexLength, u);
char buf2[detail::kMaxHexLength + 1];
- sprintf(buf2, "%jx", static_cast<uintmax_t>(u));
+ EXPECT_LT(snprintf(buf2, sizeof(buf2), "%jx", static_cast<uintmax_t>(u)),
+ sizeof(buf2));
EXPECT_EQ(std::string(buf2), std::string(p));
}
}
TEST(Format, Simple) {
- EXPECT_EQ("hello", fstr("hello"));
- EXPECT_EQ("42", fstr("{}", 42));
- EXPECT_EQ("42 42", fstr("{0} {0}", 42));
- EXPECT_EQ("00042 23 42", fstr("{0:05} {1:3} {0:4}", 42, 23));
+ EXPECT_EQ("hello", sformat("hello"));
+ EXPECT_EQ("42", sformat("{}", 42));
+ EXPECT_EQ("42 42", sformat("{0} {0}", 42));
+ EXPECT_EQ("00042 23 42", sformat("{0:05} {1:3} {0:4}", 42, 23));
EXPECT_EQ("hello world hello 42",
- fstr("{0} {1} {0} {2}", "hello", "world", 42));
- EXPECT_EQ("XXhelloXX", fstr("{:X^9}", "hello"));
- EXPECT_EQ("XXX42XXXX", fstr("{:X^9}", 42));
- EXPECT_EQ("-0xYYYY2a", fstr("{:Y=#9x}", -42));
- EXPECT_EQ("*", fstr("{}", '*'));
- EXPECT_EQ("42", fstr("{}", 42));
- EXPECT_EQ("0042", fstr("{:04}", 42));
-
- EXPECT_EQ("hello ", fstr("{:7}", "hello"));
- EXPECT_EQ("hello ", fstr("{:<7}", "hello"));
- EXPECT_EQ(" hello", fstr("{:>7}", "hello"));
+ sformat("{0} {1} {0} {2}", "hello", "world", 42));
+ EXPECT_EQ("XXhelloXX", sformat("{:X^9}", "hello"));
+ EXPECT_EQ("XXX42XXXX", sformat("{:X^9}", 42));
+ EXPECT_EQ("-0xYYYY2a", sformat("{:Y=#9x}", -42));
+ EXPECT_EQ("*", sformat("{}", '*'));
+ EXPECT_EQ("42", sformat("{}", 42));
+ EXPECT_EQ("0042", sformat("{:04}", 42));
+
+ EXPECT_EQ("hello ", sformat("{:7}", "hello"));
+ EXPECT_EQ("hello ", sformat("{:<7}", "hello"));
+ EXPECT_EQ(" hello", sformat("{:>7}", "hello"));
+
+ EXPECT_EQ(" hi", sformat("{:>*}", 4, "hi"));
+ EXPECT_EQ(" hi!", sformat("{:*}{}", 3, "", "hi!"));
+ EXPECT_EQ(" 123", sformat("{:*}", 7, 123));
+ EXPECT_EQ("123 ", sformat("{:<*}", 7, 123));
+ EXPECT_EQ("----<=>----", sformat("{:-^*}", 11, "<=>"));
+ EXPECT_EQ("+++456+++", sformat("{2:+^*0}", 9, "unused", 456));
std::vector<int> v1 {10, 20, 30};
- EXPECT_EQ("0020", fstr("{0[1]:04}", v1));
- EXPECT_EQ("0020", vstr("{1:04}", v1));
- EXPECT_EQ("10 20", vstr("{} {}", v1));
+ EXPECT_EQ("0020", sformat("{0[1]:04}", v1));
+ EXPECT_EQ("0020", svformat("{1:04}", v1));
+ EXPECT_EQ("10 20", svformat("{} {}", v1));
const std::vector<int> v2 = v1;
- EXPECT_EQ("0020", fstr("{0[1]:04}", v2));
- EXPECT_EQ("0020", vstr("{1:04}", v2));
-
- const int p[] = {10, 20, 30};
- const int* q = p;
- EXPECT_EQ("0020", fstr("{0[1]:04}", p));
- EXPECT_EQ("0020", vstr("{1:04}", p));
- EXPECT_EQ("0020", fstr("{0[1]:04}", q));
- EXPECT_EQ("0020", vstr("{1:04}", q));
-
- EXPECT_EQ("0x", fstr("{}", p).substr(0, 2));
- EXPECT_EQ("10", vstr("{}", p));
- EXPECT_EQ("0x", fstr("{}", q).substr(0, 2));
- EXPECT_EQ("10", vstr("{}", q));
- q = nullptr;
- EXPECT_EQ("(null)", fstr("{}", q));
+ EXPECT_EQ("0020", sformat("{0[1]:04}", v2));
+ EXPECT_EQ("0020", svformat("{1:04}", v2));
+ EXPECT_THROW(sformat("{0[3]:04}", v2), std::out_of_range);
+ EXPECT_THROW(svformat("{3:04}", v2), std::out_of_range);
+ EXPECT_EQ("0020", sformat("{0[1]:04}", defaulted(v2, 42)));
+ EXPECT_EQ("0020", svformat("{1:04}", defaulted(v2, 42)));
+ EXPECT_EQ("0042", sformat("{0[3]:04}", defaulted(v2, 42)));
+ EXPECT_EQ("0042", svformat("{3:04}", defaulted(v2, 42)));
+
+ {
+ const int p[] = { 10, 20, 30 };
+ const int* q = p;
+ EXPECT_EQ("0020", sformat("{0[1]:04}", p));
+ EXPECT_EQ("0020", svformat("{1:04}", p));
+ EXPECT_EQ("0020", sformat("{0[1]:04}", q));
+ EXPECT_EQ("0020", svformat("{1:04}", q));
+ EXPECT_NE("", sformat("{}", q));
+
+ EXPECT_EQ("0x", sformat("{}", p).substr(0, 2));
+ EXPECT_EQ("10", svformat("{}", p));
+ EXPECT_EQ("0x", sformat("{}", q).substr(0, 2));
+ EXPECT_EQ("10", svformat("{}", q));
+ q = nullptr;
+ EXPECT_EQ("(null)", sformat("{}", q));
+ }
std::map<int, std::string> m { {10, "hello"}, {20, "world"} };
- EXPECT_EQ("worldXX", fstr("{[20]:X<7}", m));
- EXPECT_EQ("worldXX", vstr("{20:X<7}", m));
+ EXPECT_EQ("worldXX", sformat("{[20]:X<7}", m));
+ EXPECT_EQ("worldXX", svformat("{20:X<7}", m));
+ EXPECT_THROW(sformat("{[42]:X<7}", m), std::out_of_range);
+ EXPECT_THROW(svformat("{42:X<7}", m), std::out_of_range);
+ EXPECT_EQ("worldXX", sformat("{[20]:X<7}", defaulted(m, "meow")));
+ EXPECT_EQ("worldXX", svformat("{20:X<7}", defaulted(m, "meow")));
+ EXPECT_EQ("meowXXX", sformat("{[42]:X<7}", defaulted(m, "meow")));
+ EXPECT_EQ("meowXXX", svformat("{42:X<7}", defaulted(m, "meow")));
std::map<std::string, std::string> m2 { {"hello", "world"} };
- EXPECT_EQ("worldXX", fstr("{[hello]:X<7}", m2));
- EXPECT_EQ("worldXX", vstr("{hello:X<7}", m2));
+ EXPECT_EQ("worldXX", sformat("{[hello]:X<7}", m2));
+ EXPECT_EQ("worldXX", svformat("{hello:X<7}", m2));
+ EXPECT_THROW(sformat("{[none]:X<7}", m2), std::out_of_range);
+ EXPECT_THROW(svformat("{none:X<7}", m2), std::out_of_range);
+ EXPECT_EQ("worldXX", sformat("{[hello]:X<7}", defaulted(m2, "meow")));
+ EXPECT_EQ("worldXX", svformat("{hello:X<7}", defaulted(m2, "meow")));
+ EXPECT_EQ("meowXXX", sformat("{[none]:X<7}", defaulted(m2, "meow")));
+ EXPECT_EQ("meowXXX", svformat("{none:X<7}", defaulted(m2, "meow")));
// Test indexing in strings
- EXPECT_EQ("61 62", fstr("{0[0]:x} {0[1]:x}", "abcde"));
- EXPECT_EQ("61 62", vstr("{0:x} {1:x}", "abcde"));
- EXPECT_EQ("61 62", fstr("{0[0]:x} {0[1]:x}", std::string("abcde")));
- EXPECT_EQ("61 62", vstr("{0:x} {1:x}", std::string("abcde")));
+ EXPECT_EQ("61 62", sformat("{0[0]:x} {0[1]:x}", "abcde"));
+ EXPECT_EQ("61 62", svformat("{0:x} {1:x}", "abcde"));
+ EXPECT_EQ("61 62", sformat("{0[0]:x} {0[1]:x}", std::string("abcde")));
+ EXPECT_EQ("61 62", svformat("{0:x} {1:x}", std::string("abcde")));
// Test booleans
- EXPECT_EQ("true", fstr("{}", true));
- EXPECT_EQ("1", fstr("{:d}", true));
- EXPECT_EQ("false", fstr("{}", false));
- EXPECT_EQ("0", fstr("{:d}", false));
+ EXPECT_EQ("true", sformat("{}", true));
+ EXPECT_EQ("1", sformat("{:d}", true));
+ EXPECT_EQ("false", sformat("{}", false));
+ EXPECT_EQ("0", sformat("{:d}", false));
// Test pairs
{
std::pair<int, std::string> p {42, "hello"};
- EXPECT_EQ(" 42 hello ", fstr("{0[0]:6} {0[1]:6}", p));
- EXPECT_EQ(" 42 hello ", vstr("{:6} {:6}", p));
+ EXPECT_EQ(" 42 hello ", sformat("{0[0]:6} {0[1]:6}", p));
+ EXPECT_EQ(" 42 hello ", svformat("{:6} {:6}", p));
}
// Test tuples
{
std::tuple<int, std::string, int> t { 42, "hello", 23 };
- EXPECT_EQ(" 42 hello 23", fstr("{0[0]:6} {0[1]:6} {0[2]:6}", t));
- EXPECT_EQ(" 42 hello 23", vstr("{:6} {:6} {:6}", t));
+ EXPECT_EQ(" 42 hello 23", sformat("{0[0]:6} {0[1]:6} {0[2]:6}", t));
+ EXPECT_EQ(" 42 hello 23", svformat("{:6} {:6} {:6}", t));
}
// Test writing to stream
EXPECT_EQ("42 23 hello worldXX", s);
}
-namespace {
-void testFloat(const char* fmt, double val) {
- char buf[100];
- sprintf(buf, to<std::string>("%", fmt).c_str(), val);
-
- EXPECT_EQ(buf, fstr(to<std::string>("{:", fmt, "}"), val));
-}
-} // namespace
-
TEST(Format, Float) {
- double d = 1;
- EXPECT_EQ("1", fstr("{}", 1.0));
- EXPECT_EQ("0.1", fstr("{}", 0.1));
- EXPECT_EQ("0.01", fstr("{}", 0.01));
- EXPECT_EQ("0.001", fstr("{}", 0.001));
- EXPECT_EQ("0.0001", fstr("{}", 0.0001));
- EXPECT_EQ("1e-5", fstr("{}", 0.00001));
- EXPECT_EQ("1e-6", fstr("{}", 0.000001));
-
- EXPECT_EQ("10", fstr("{}", 10.0));
- EXPECT_EQ("100", fstr("{}", 100.0));
- EXPECT_EQ("1000", fstr("{}", 1000.0));
- EXPECT_EQ("10000", fstr("{}", 10000.0));
- EXPECT_EQ("100000", fstr("{}", 100000.0));
- EXPECT_EQ("1e+6", fstr("{}", 1000000.0));
- EXPECT_EQ("1e+7", fstr("{}", 10000000.0));
-
- EXPECT_EQ("1.00", fstr("{:.2f}", 1.0));
- EXPECT_EQ("0.10", fstr("{:.2f}", 0.1));
- EXPECT_EQ("0.01", fstr("{:.2f}", 0.01));
- EXPECT_EQ("0.00", fstr("{:.2f}", 0.001));
+ EXPECT_EQ("1", sformat("{}", 1.0));
+ EXPECT_EQ("0.1", sformat("{}", 0.1));
+ EXPECT_EQ("0.01", sformat("{}", 0.01));
+ EXPECT_EQ("0.001", sformat("{}", 0.001));
+ EXPECT_EQ("0.0001", sformat("{}", 0.0001));
+ EXPECT_EQ("1e-5", sformat("{}", 0.00001));
+ EXPECT_EQ("1e-6", sformat("{}", 0.000001));
+
+ EXPECT_EQ("10", sformat("{}", 10.0));
+ EXPECT_EQ("100", sformat("{}", 100.0));
+ EXPECT_EQ("1000", sformat("{}", 1000.0));
+ EXPECT_EQ("10000", sformat("{}", 10000.0));
+ EXPECT_EQ("100000", sformat("{}", 100000.0));
+ EXPECT_EQ("1e+6", sformat("{}", 1000000.0));
+ EXPECT_EQ("1e+7", sformat("{}", 10000000.0));
+
+ EXPECT_EQ("1.00", sformat("{:.2f}", 1.0));
+ EXPECT_EQ("0.10", sformat("{:.2f}", 0.1));
+ EXPECT_EQ("0.01", sformat("{:.2f}", 0.01));
+ EXPECT_EQ("0.00", sformat("{:.2f}", 0.001));
+
+ EXPECT_EQ("100000. !== 100000", sformat("{:.} !== {:.}", 100000.0, 100000));
+ EXPECT_EQ("100000.", sformat("{:.}", 100000.0));
+ EXPECT_EQ("1e+6", sformat("{:.}", 1000000.0));
+ EXPECT_EQ(" 100000.", sformat("{:8.}", 100000.0));
+ EXPECT_EQ("100000.", sformat("{:4.}", 100000.0));
+ EXPECT_EQ(" 100000", sformat("{:8.8}", 100000.0));
+ EXPECT_EQ(" 100000.", sformat("{:8.8.}", 100000.0));
}
TEST(Format, MultiLevel) {
},
};
- EXPECT_EQ("world", fstr("{[0.hello]}", v));
+ EXPECT_EQ("world", sformat("{[0.hello]}", v));
+}
+
+TEST(Format, separatorDecimalInteger) {
+ EXPECT_EQ("0", sformat("{:,d}", 0));
+ EXPECT_EQ("1", sformat("{:d}", 1));
+ EXPECT_EQ("1", sformat("{:,d}", 1));
+ EXPECT_EQ("1", sformat("{:,}", 1));
+ EXPECT_EQ("123", sformat("{:d}", 123));
+ EXPECT_EQ("123", sformat("{:,d}", 123));
+ EXPECT_EQ("123", sformat("{:,}", 123));
+ EXPECT_EQ("1234", sformat("{:d}", 1234));
+ EXPECT_EQ("1,234", sformat("{:,d}", 1234));
+ EXPECT_EQ("1,234", sformat("{:,}", 1234));
+ EXPECT_EQ("12345678", sformat("{:d}", 12345678));
+ EXPECT_EQ("12,345,678", sformat("{:,d}", 12345678));
+ EXPECT_EQ("12,345,678", sformat("{:,}", 12345678));
+ EXPECT_EQ("-1234", sformat("{:d}", -1234));
+ EXPECT_EQ("-1,234", sformat("{:,d}", -1234));
+ EXPECT_EQ("-1,234", sformat("{:,}", -1234));
+
+ int64_t max_int64_t = std::numeric_limits<int64_t>::max();
+ int64_t min_int64_t = std::numeric_limits<int64_t>::min();
+ uint64_t max_uint64_t = std::numeric_limits<uint64_t>::max();
+ EXPECT_EQ("9223372036854775807", sformat("{:d}", max_int64_t));
+ EXPECT_EQ("9,223,372,036,854,775,807", sformat("{:,d}", max_int64_t));
+ EXPECT_EQ("9,223,372,036,854,775,807", sformat("{:,}", max_int64_t));
+ EXPECT_EQ("-9223372036854775808", sformat("{:d}", min_int64_t));
+ EXPECT_EQ("-9,223,372,036,854,775,808", sformat("{:,d}", min_int64_t));
+ EXPECT_EQ("-9,223,372,036,854,775,808", sformat("{:,}", min_int64_t));
+ EXPECT_EQ("18446744073709551615", sformat("{:d}", max_uint64_t));
+ EXPECT_EQ("18,446,744,073,709,551,615", sformat("{:,d}", max_uint64_t));
+ EXPECT_EQ("18,446,744,073,709,551,615", sformat("{:,}", max_uint64_t));
+
+ EXPECT_EQ(" -1,234", sformat("{: 8,}", -1234));
+ EXPECT_EQ("-001,234", sformat("{:08,d}", -1234));
+ EXPECT_EQ("-00001,234", sformat("{:010,d}", -1234));
+ EXPECT_EQ(" -1,234 ", sformat("{:^ 8,d}", -1234));
}
-TEST(Format, dynamic) {
- auto dyn = parseJson(
- "{\n"
- " \"hello\": \"world\",\n"
- " \"x\": [20, 30],\n"
- " \"y\": {\"a\" : 42}\n"
- "}");
+// Note that sformat("{:n}", ...) uses the current locale setting to insert the
+// appropriate number separator characters.
+TEST(Format, separatorNumber) {
+ EXPECT_EQ("0", sformat("{:n}", 0));
+ EXPECT_EQ("1", sformat("{:n}", 1));
+ EXPECT_EQ("123", sformat("{:n}", 123));
+ EXPECT_EQ("1234", sformat("{:n}", 1234));
+ EXPECT_EQ("12345678", sformat("{:n}", 12345678));
+ EXPECT_EQ("-1234", sformat("{:n}", -1234));
+
+ int64_t max_int64_t = std::numeric_limits<int64_t>::max();
+ int64_t min_int64_t = std::numeric_limits<int64_t>::min();
+ uint64_t max_uint64_t = std::numeric_limits<uint64_t>::max();
+ EXPECT_EQ("9223372036854775807", sformat("{:n}", max_int64_t));
+ EXPECT_EQ("-9223372036854775808", sformat("{:n}", min_int64_t));
+ EXPECT_EQ("18446744073709551615", sformat("{:n}", max_uint64_t));
+
+ EXPECT_EQ(" -1234", sformat("{: 8n}", -1234));
+ EXPECT_EQ("-0001234", sformat("{:08n}", -1234));
+ EXPECT_EQ("-000001234", sformat("{:010n}", -1234));
+ EXPECT_EQ(" -1234 ", sformat("{:^ 8n}", -1234));
+}
- EXPECT_EQ("world", fstr("{0[hello]}", dyn));
- EXPECT_EQ("20", fstr("{0[x.0]}", dyn));
- EXPECT_EQ("42", fstr("{0[y.a]}", dyn));
+// insertThousandsGroupingUnsafe requires non-const params
+static void testGrouping(const char* a_str, const char* expected) {
+ char str[256];
+ char* end_ptr = str + snprintf(str, sizeof(str), "%s", a_str);
+ ASSERT_LT(end_ptr, str + sizeof(str));
+ folly::detail::insertThousandsGroupingUnsafe(str, &end_ptr);
+ ASSERT_STREQ(expected, str);
+}
- EXPECT_EQ("(null)", fstr("{}", dynamic(nullptr)));
+TEST(Format, separatorUnit) {
+ testGrouping("0", "0");
+ testGrouping("1", "1");
+ testGrouping("12", "12");
+ testGrouping("123", "123");
+ testGrouping("1234", "1,234");
+ testGrouping("12345", "12,345");
+ testGrouping("123456", "123,456");
+ testGrouping("1234567", "1,234,567");
+ testGrouping("1234567890", "1,234,567,890");
+ testGrouping("9223372036854775807", "9,223,372,036,854,775,807");
+ testGrouping("18446744073709551615", "18,446,744,073,709,551,615");
}
+
namespace {
struct KeyValue {
TEST(Format, Custom) {
KeyValue kv { "hello", 42 };
- EXPECT_EQ("<key=hello, value=42>", fstr("{}", kv));
- EXPECT_EQ("<key=hello, value=42>", fstr("{:10}", kv));
- EXPECT_EQ("<key=hello", fstr("{:.10}", kv));
- EXPECT_EQ("<key=hello, value=42>XX", fstr("{:X<23}", kv));
- EXPECT_EQ("XX<key=hello, value=42>", fstr("{:X>23}", kv));
+ EXPECT_EQ("<key=hello, value=42>", sformat("{}", kv));
+ EXPECT_EQ("<key=hello, value=42>", sformat("{:10}", kv));
+ EXPECT_EQ("<key=hello", sformat("{:.10}", kv));
+ EXPECT_EQ("<key=hello, value=42>XX", sformat("{:X<23}", kv));
+ EXPECT_EQ("XX<key=hello, value=42>", sformat("{:X>23}", kv));
+ EXPECT_EQ("<key=hello, value=42>", sformat("{0[0]}", &kv));
+ EXPECT_NE("", sformat("{}", &kv));
+}
+
+namespace {
+
+struct Opaque {
+ int k;
+};
+
+} // namespace
+
+#define EXPECT_THROW_STR(code, type, str) \
+ do { \
+ bool caught = false; \
+ try { \
+ code; \
+ } catch (const type& e) { \
+ caught = true; \
+ EXPECT_TRUE(strstr(e.what(), (str)) != nullptr) << \
+ "Expected message [" << (str) << "], actual message [" << \
+ e.what(); \
+ } catch (const std::exception& e) { \
+ caught = true; \
+ ADD_FAILURE() << "Caught different exception type; expected " #type \
+ ", caught " << folly::demangle(typeid(e)); \
+ } catch (...) { \
+ caught = true; \
+ ADD_FAILURE() << "Caught unknown exception type; expected " #type; \
+ } \
+ if (!caught) { \
+ ADD_FAILURE() << "Expected exception " #type ", caught nothing"; \
+ } \
+ } while (false)
+
+#define EXPECT_FORMAT_ERROR(code, str) \
+ EXPECT_THROW_STR(code, folly::BadFormatArg, (str))
+
+TEST(Format, Unformatted) {
+ Opaque o;
+ EXPECT_NE("", sformat("{}", &o));
+ EXPECT_FORMAT_ERROR(sformat("{0[0]}", &o),
+ "No formatter available for this type");
+}
+
+TEST(Format, Nested) {
+ EXPECT_EQ("1 2 3 4", sformat("{} {} {}", 1, 2, format("{} {}", 3, 4)));
+ //
+ // not copyable, must hold temporary in scope instead.
+ auto&& saved = format("{} {}", 3, 4);
+ EXPECT_EQ("1 2 3 4", sformat("{} {} {}", 1, 2, saved));
+}
+
+TEST(Format, OutOfBounds) {
+ std::vector<int> ints{1, 2, 3, 4, 5};
+ EXPECT_EQ("1 3 5", sformat("{0[0]} {0[2]} {0[4]}", ints));
+ EXPECT_THROW(sformat("{[5]}", ints), std::out_of_range);
+
+ std::map<std::string, int> map{{"hello", 0}, {"world", 1}};
+ EXPECT_EQ("hello = 0", sformat("hello = {[hello]}", map));
+ EXPECT_THROW(sformat("{[nope]}", map), std::out_of_range);
+ EXPECT_THROW(svformat("{nope}", map), std::out_of_range);
+}
+
+TEST(Format, BogusFormatString) {
+ EXPECT_FORMAT_ERROR(sformat("}"), "single '}' in format string");
+ EXPECT_FORMAT_ERROR(sformat("foo}bar"), "single '}' in format string");
+ EXPECT_FORMAT_ERROR(sformat("foo{bar"), "missing ending '}'");
+ EXPECT_FORMAT_ERROR(sformat("{[test]"), "missing ending '}'");
+ EXPECT_FORMAT_ERROR(sformat("{-1.3}"), "argument index must be non-negative");
+ EXPECT_FORMAT_ERROR(sformat("{1.3}", 0, 1, 2), "index not allowed");
+ EXPECT_FORMAT_ERROR(sformat("{0} {} {1}", 0, 1, 2),
+ "may not have both default and explicit arg indexes");
+ EXPECT_FORMAT_ERROR(sformat("{:*}", 1.2),
+ "dynamic field width argument must be integral");
+ EXPECT_FORMAT_ERROR(sformat("{} {:*}", "hi"),
+ "argument index out of range, max=1");
+ EXPECT_FORMAT_ERROR(
+ sformat("{:*0}", 12, "ok"),
+ "cannot provide width arg index without value arg index"
+ );
+ EXPECT_FORMAT_ERROR(
+ sformat("{0:*}", 12, "ok"),
+ "cannot provide value arg index without width arg index"
+ );
+
+ std::vector<int> v{1, 2, 3};
+ EXPECT_FORMAT_ERROR(svformat("{:*}", v),
+ "dynamic field width not supported in vformat()");
+
+ // This one fails in detail::enforceWhitespace(), which throws
+ // std::range_error
+ EXPECT_THROW_STR(sformat("{0[test}"), std::range_error, "Non-whitespace");
}
-int main(int argc, char *argv[]) {
- testing::InitGoogleTest(&argc, argv);
- google::ParseCommandLineFlags(&argc, &argv, true);
- return RUN_ALL_TESTS();
+template <bool containerMode, class... Args>
+class TestExtendingFormatter;
+
+template <bool containerMode, class... Args>
+class TestExtendingFormatter
+ : public BaseFormatter<TestExtendingFormatter<containerMode, Args...>,
+ containerMode,
+ Args...> {
+ private:
+ explicit TestExtendingFormatter(StringPiece& str, Args&&... args)
+ : BaseFormatter<TestExtendingFormatter<containerMode, Args...>,
+ containerMode,
+ Args...>(str, std::forward<Args>(args)...) {}
+
+ template <size_t K, class Callback>
+ void doFormatArg(FormatArg& arg, Callback& cb) const {
+ std::string result;
+ auto appender = [&result](StringPiece s) {
+ result.append(s.data(), s.size());
+ };
+ std::get<K>(this->values_).format(arg, appender);
+ result = sformat("{{{}}}", result);
+ cb(StringPiece(result));
+ }
+
+ friend class BaseFormatter<TestExtendingFormatter<containerMode, Args...>,
+ containerMode,
+ Args...>;
+
+ template <class... A>
+ friend std::string texsformat(StringPiece fmt, A&&... arg);
+};
+
+template <class... Args>
+std::string texsformat(StringPiece fmt, Args&&... args) {
+ return TestExtendingFormatter<false, Args...>(
+ fmt, std::forward<Args>(args)...).str();
}
+TEST(Format, Extending) {
+ EXPECT_EQ(texsformat("I {} brackets", "love"), "I {love} brackets");
+ EXPECT_EQ(texsformat("I {} nesting", sformat("really {}", "love")),
+ "I {really love} nesting");
+ EXPECT_EQ(
+ sformat("I also {} nesting", texsformat("have an {} for", "affinity")),
+ "I also have an {affinity} for nesting");
+ EXPECT_EQ(texsformat("Extending {} in {}",
+ texsformat("a {}", "formatter"),
+ "another formatter"),
+ "Extending {a {formatter}} in {another formatter}");
+}
projects / folly.git / blobdiff