Compile-time

This hub captures the compile-time pipeline in modern C++. Use it to navigate template formation, constraint filtering, and constant evaluation before code generation. The focus is practical: which language/library entry points control each phase.

# Mental Model Diagram

Key idea: templates and constraints decide viable program forms, constant evaluation resolves values, and only then backend code emission starts.

# Constant Evaluation

• Constant expressions
• constexpr
• consteval
• constinit
• static_assert

# Templates and Instantiation

• Templates
• Template parameters
• Partial specialization
• SFINAE
• Fold expressions

# Constraints and Concepts

• Constraints
• Concepts library
• invocable
• predicate
• regular

# Type Traits and Compile-Time Values

• Type support (meta)
• integral_constant
• enable_if
• is_same
• conditional

# Fast Entry Points

• Pipeline overview: Templates
• Rule filtering: Constraints
• Evaluation semantics: constexpr
• Trait toolbox: Type support (meta)