Narrow type
A narrow type is a C integer or character type whose values undergo integer promotion before arithmetic evaluation.
Modern C
A narrow type is a C integer or character type whose values undergo integer promotion before arithmetic evaluation.
- How it is used
- Deploys narrow types for character data, Boolean values, byte inspection, and memory-efficient storage rather than arithmetic.
- How deep it goes
- Defines promotion, range variation, and practical restrictions, but defers detailed operator conversion rules.
- Examples
- Uses `short`, `char`, `bool`, `unsigned char`, oversized assignments, and byte-wise inspection of an unsigned integer.
- What you can do after
- Evaluate narrow-type choices and avoid unintended arithmetic or information loss from promotion and narrowing conversions.
Modern C, Third Edition
A narrow type is a C integer type that undergoes integer promotion before being used in an arithmetic expression.
- How it is used
- Explains why certain C integer types are converted before arithmetic expressions are considered.
- How deep it goes
- Defines promotion behavior and implementation variation, but does not provide a worked expression or compiler output.
- Examples
- Uses char and bool as prominent narrow types and Table 5.1 as a classification reference.
- What you can do after
- Evaluate arithmetic involving char, bool, and other narrow integers by accounting for promotion to signed int.
Related concepts
- integer promotionproduces · Integer promotion is the implicit conversion of certain narrow integer operands to int or another suitable integer type before specified operations.
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