Vix Template Engine Vix Template Engine is a minimal, deterministic and high-performance C++ template rendering engine built for real systems. Designed for predictability, performance, and clarity.

The Vix template engine removes complexity found in traditional template systems.

No magic. No hidden state. Just a clean pipeline:

Loader → Lexer → Parser → AST → Template → Renderer

Hello {{ name }}
{% if user %}Welcome{% endif %}

#include <vix/template/Engine.hpp>

using namespace vix::template_;

int main() {
  Engine engine;

  Context ctx;
  ctx.set("name", "Alice");
  ctx.set("user", true);

  auto result = engine.render_string(
    "Hello {{ name }} {% if user %}Welcome{% endif %}",
    ctx
  );

  std::cout << result.output;
}

Hello Alice Welcome

• Variable interpolation
• If conditions
• For loops
• HTML escaping (automatic)
• AST-based rendering
• Deterministic execution
• Optional caching

{{ name }}

{% if user %}
Hello
{% endif %}

{% for item in items %}
{{ item }}
{% endfor %}

Same input → same output No hidden behavior

Only essential features No over-engineering

• AST reused across renders
• no dynamic parsing at runtime
• low allocations

No runtime dependency Full control over memory and performance

cmake --preset dev-ninja
cmake --build --preset build-ninja

./build-ninja/template_basic_render
./build-ninja/template_loops_and_conditions

./build-ninja/template_render_bench
./build-ninja/template_parse_bench
./build-ninja/template_cache_bench

The engine is built on a clean separation of concerns:

• Loader → source retrieval
• Lexer → tokenization
• Parser → AST creation
• Template → compiled structure
• Renderer → execution

This makes the system:

• easy to understand
• easy to extend
• easy to optimize

Upcoming features:

• Filters ({{ name | upper }})
• Includes
• Layout inheritance
• Expression system
• Compiler optimizations

The goal is not to be complex first.

The goal is to be:

• correct
• fast
• extensible

Contributions are welcome.

If you care about modern C++, performance, and real-world systems, this project is for you.

⭐ Star the project if you like the direction.

MIT License