Type expression
A type expression is syntactic notation that specifies the type of a value, expression, or component.
Learn Haskell by Example
A type expression is syntactic notation that describes the type of a value or expression, including the element type of a list or the component types of a tuple.
- How it is used
- Documents top-level definitions and guides type inference while building cipher and graph functions.
- How deep it goes
- Explains atomic, list, tuple, function, and parametric forms, then defers restricted type variables to type classes.
- Examples
- Uses numeric prefixes, typed lists and tuples, `transform`, and an associative-list `member` function.
- What you can do after
- Evaluate/understand signatures for concrete collections, tuple components, polymorphic functions, and comparison-related compiler errors.
Read how Learn Haskell by Example explains type expression →
Modern C
A type expression is a type specification appearing as an alternative association in a _Generic expression.
- How it is used
- Selects type-specific expressions inside type-generic macros.
- How deep it goes
- Defines syntax and restrictions, then explains qualifier removal and array and function conversions.
- Examples
- Demonstrates integer alternatives in MAXVAL and floating-point alternatives in a type-generic min macro.
- What you can do after
- Build type-generic macros by matching normalized expression types with appropriate alternatives.
Related concepts
- expressioncontrasts with · An expression is a syntactic construct in a programming language that evaluates to a value or designates an object, and may also cause side effects.
- identifierconfigures · An identifier is a name or value that denotes or distinguishes an entity or program element within a system.
- integerincludes · An integer is a whole-number value with no fractional part, including negative numbers, zero, and positive numbers.
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