Standard conversion sequences

Standard conversion sequences are categorized in one of three ranks. The ranks are listed in order from best to worst:

• Exact match: This rank includes the following conversions:
  • Identity conversions
  • Lvalue-to-rvalue conversions
  • Array-to-pointer conversions
  • Qualification conversions
• Promotion: This rank includes integral and floating point promotions.
• Conversion: This rank includes the following conversions:
  • Integral and floating-point conversions
  • Floating-integral conversions
  • Pointer conversions
  • Pointer-to-member conversions
  • Boolean conversions

The compiler ranks a standard conversion sequence by its worst-ranked standard conversion. For example, if a standard conversion sequence has a floating-point conversion, then that sequence has conversion rank.

Related information

• Lvalue-to-rvalue conversions
• Pointer conversions
• Qualification conversions (C++ only)
• Integral conversions
• Floating-point conversions
• Boolean conversions