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Type equality modulo type distinction
Type equality modulo type distinction Type equality modulo type distinction The following algorithm (in pseudo-code) determines whether two types are equal with no respect to ... -
ALTER TYPE
ALTER TYPE 功能描述 注意事项 语法格式 参数说明 示例 相关链接 ALTER TYPE 功能描述 修改一个类型的定义。 注意事项 类型的所有者或者被授予了类型ALTER权限的用户或者被授予了ALTER ANY TYPE权限的用户可以执行ALTER TYPE命令，系统管理员默认拥有此权限。但要修改类型的所有者或者修改类型的模... -
Type inference
Type inference With type restrictions Without type restrictions 1. Assigning a literal value 2. Assigning the result of invoking the class method new 3. Assigning a variable th... -
ENUM Type
The ENUM Type Syntax Explanations Example Explanation Insert ENUM values Features that are different from MySQL Constraints The ENUM Type “ENUM” is a list of strings used ... -
Type restrictions
Type restrictions Restrictions from instance variables self restriction Classes as restrictions Type restrictions in splats Free variables Type restrictions Type restrictio... -
Type autocasting
Type autocasting Number autocasting Symbol autocasting Type autocasting Crystal transparently casts elements of certain types when there is no ambiguity. Number autocasting ... -
Type reflection
Type reflection Type reflection Crystal provides basic methods to do type reflection, casting and introspection. -
Type grammar
Type grammar Paths and generics Union Nilable Pointer StaticArray Tuple NamedTuple Proc self class Underscore typeof Type grammar When: specifying type restriction... -
Type inference
Type inference With type restrictions Without type restrictions 1. Assigning a literal value 2. Assigning the result of invoking the class method new 3. Assigning a variable th... -
Type grammar
Type grammar Paths and generics Union Nilable Pointer StaticArray Tuple NamedTuple Proc self class Underscore typeof Type grammar When: specifying type restriction...