1. rcrnstn/cxx-str
  2. tests
  3. str.cpp
Browse code

Add implementation

Robert Cranston authored on 18/05/2020 13:08:47
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tests/str.cpp
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+#include <str.hpp>
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+
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+#include <iostream>
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+#include <string>
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+#include <unordered_map>
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+#include <vector>
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+
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+
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+auto constexpr first  = 1;
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+auto constexpr second = 2;
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+auto constexpr third  = 3;
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+
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+std::string static str_case_(int value)
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+{
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+    switch(value)
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+    {
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+        STR_CASE(first)
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+        STR_CASE(second)
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+        STR_CASE(third)
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+        default:
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+            return "unknown";
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+    }
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+}
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+
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+std::string static str_cond_(int value)
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+{
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+    return
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+        STR_COND(value, first)
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+        STR_COND(value, second)
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+        STR_COND(value, third)
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+        "unknown";
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+}
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+
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+std::string static str_init_(int value)
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+{
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+    auto str = std::unordered_map<int, std::string>{
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+        STR_INIT(first)
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+        STR_INIT(second)
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+        STR_INIT(third)
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+    }[value];
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+    if (str.empty())
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+        return "unknown";
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+    return str;
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+}
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+
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+
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+void static func_inner_()
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+{
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+    try
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+    {
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+        STR_THROW(
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+            "Expected " << "this" << ", " <<
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+            "got "      << "that" << "."
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+        );
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+    }
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+    catch (...)
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+    {
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+        STR_NESTED_THROW("Failed to do " << "inner" << ":");
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+    }
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+}
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+
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+void static func_outer_()
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+{
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+    try
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+    {
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+        func_inner_();
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+    }
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+    catch (...)
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+    {
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+        STR_NESTED_THROW("Failed to do " << "outer" << ":");
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+    }
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+}
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+
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+
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+int main()
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+{
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+    auto const value  = 0x03;
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+    auto const values = std::vector<std::string>{"first", "", "third"};
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+    std::cout << STR(     std::hex << std::showbase << value)   << std::endl;
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+    std::cout << STR_FUNC(std::hex << std::showbase << value)() << std::endl;
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+    std::cout << STR_JOIN(", ", it, "\"" << it << "\"", values) << std::endl;
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+    std::cout << STR_JOIN_INIT(", ", it, it, int, {1, 2, 3}) << std::endl;
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+    std::cout << STR_JOIN_INITSTR(", ", it, it, {
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+        std::string{"first"},
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+        "",
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+        "third",
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+    }) << std::endl;
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+
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+    std::cout << std::endl;
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+
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+    std::cout << str_case_(1) << std::endl; // Uses `STR_CASE`.
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+    std::cout << str_cond_(0) << std::endl; // Uses `STR_COND`.
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+    std::cout << str_init_(3) << std::endl; // Uses `STR_INIT`.
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+
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+    std::cout << std::endl;
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+
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+    std::cout << STR_HERE("Hello from " << "here") << std::endl;
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+
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+    std::cout << std::endl;
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+
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+    try
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+    {
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+        STR_THROW_ERRNO();
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+    }
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+    catch (std::exception const & exception)
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+    {
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+        std::cout << exception.what() << std::endl;
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+    }
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+
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+    try
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+    {
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+        func_outer_();
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+    }
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+    catch (std::exception const & exception)
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+    {
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+        // TODO(rcrnstn): There may be a bug in `clang-tidy` 13, check if
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+        // `STR_NESTED_WHAT` passes with a newer version.
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+        // NOLINTNEXTLINE
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+        std::cout << STR_NESTED_WHAT("\n", exception) << std::endl;
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+    }
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+}