Keywords — Maple v0.0.10beta Documentation

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# Keywords

This page lists all of the C++ keywords, and either links to a reference page explaining their use, or provides a brief description.

## List of Keywords

The C++ keywords are:

`and`, `and_eq`, `asm`, `auto`, `bitand`, `bitor`, `bool`, `break`, `case`, `catch`, `char`, `class`, `compl`, `const`, `const_cast`, `continue`, `default`, `delete`, `do`, `double`, `dynamic_cast`, `else`, `enum`, `explicit`, `export`, `extern`, `false`, `float`, `for`, `friend`, `goto`, `if`, `inline`, `int`, `long`, `mutable`, `namespace`, `new`, `not`, `not_eq`, `operator`, `or`, `or_eq`, `private`, `protected`, `public`, `register`, `reinterpret_cast`, `return`, `short`, `signed`, `sizeof`, `static`, `static_cast`, `struct`, `switch`, `template`, `this`, `throw`, `true`, `try`, `typedef`, `typeid`, `typename`, `union`, `unsigned`, `using`, `virtual`, `void`, `volatile`, `wchar_t`, `while`, `xor`, `xor_eq`

## Boolean Operator Synonyms

- `and` is a synonym for &&.
- `not` is a synonym for !.
- `not_eq` is a synonym for !=.
- `or` is a synonym for ||.

## Bitwise Operator Synonyms

- `and_eq` is a synonym for &=.
- `bitand` is a synonym for (bitwise) &.
- `bitor` is a synonym for |.
- `compl` is a synonym for ~.
- `or_eq` is a synonym for |=.
- `xor` is a synonym for ^.
- `xor_eq` is a synonym for ^=.

## Constants

- `true` and `false` are the boolean constants.

## Control Flow

- `break` can exit out of a switch statement or a for, do, or while loop.
- `case` defines alternatives in a switch statement.
- `continue` will move control flow to the next iteration of the enclosing for, do, or while loop.
- `default` defines the default alternative in a switch statement.
- `do` introduces a do loop.
- `else` is used in if statements.
- `for` introduces a for loop.
- `goto` jumps to a label.
- `if` introduces an if statement.
- `return` transfers flow to a function’s caller.
- `switch` introduces a switch statement.
- `while` introduces a while loop.

## Types

The following keywords are used for built-in types.

- bool
- char
- double
- float
- int
- long
- short
- void (not really a type, but used in the absence of one)

The following keywords are used to introduce new types.

- enum

## Qualifiers

- static can be used to declare persistent local variables; it has other uses not documented here.
- `unsigned` is used to specify an unsigned integral type. Examples: unsigned int, unsigned char.
- volatile is useful when declaring variables that may be modified by external interrupts.
- const is used to define constants.

## Other

These keywords are not described in the Maple documentation. For more information, consult a C++ reference.

- `asm` is used to insert literal assembly language.
- `auto` is used to declare that a variable has automatic storage.
- `catch` is used in exception handling. Note that the default flags we pass to GCC include `-fno-exceptions`.
- `class` is used to define classes.
- `const_cast` is used in typecasting.
- `delete` is used to free `new`-allocated storage. Note that dynamic memory allocation is not available by default on the Maple, so you’ll have to bring your own `new` and `delete` if you want this.
- `dynamic_cast` is used in typecasting.
- `explicit` is used to declare constructors that can be called only explicitly.
- `export` declares a template definition accessible to other compilation units.
- `extern` can mark a declaration as a declaration and not a definition, and also grant external linkage to a `const` or `typedef`.
- `friend` is used to declare that certain functions have access to a class’s private variables.
- `inline` is a compiler hint to inline a function.
- `mutable` specifies that a member can be updated, even when a member of a `const` object.
- `namespace` declares a new namespace.
- `new` dynamically allocates space for a value. Note that dynamic memory allocation is not available by default on the Maple, so you’ll have to bring your own `new` and `delete` if you want this.
- `operator` is used to define type-specific operator overrides.
- `private` declares a private class member.
- `protected` declares a protected class member.
- `public` declares a public class member.
- `register` is a compiler hint to store a variable in a register.
- `reinterpret_cast` is used in typecasting.
- `signed` is the opposite of `unsigned`.
- `static_cast` is used in typecasting.
- `struct` declares a new struct.
- `template` introduces a template class, function, etc.
- `this` is a pointer to the receiver object.
- `throw` is used in exception handling. Note that the default flags we pass to GCC include `-fno-exceptions`.
- `try` is used in exception handling. Note that the default flags we pass to GCC include `-fno-exceptions`.
- `typedef` defines a type synonym.
- `union` defines an untagged union.
- `using` is a directive related to namespaces.
- `virtual` declares a method which may be overridden.
- `wchar_t` is the wide character type.

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