lambda.h

Provides functions and preprocessor definitions for lambdas (anonymous functions).

• Author: Edward Jones
• Date: 2021-09-17

Source file

func_sig

A named function signature.

• Param r: Return type of the lambda, cannot be void
• Param n: Expression of the body of the lambda, must have non-void type
• Param ps: Parameters of the lambda

Returns: The signature of a function-pointer of name n which takes ps and returns r

#define func_sig(r, n, ps) r(fun n) ps

func_type

A function type.

• Param r: Return type of the function signature
• Param ps: Parameters of the function

Returns: The type of a function-pointer which takes ps and returns r

#define func_type(r, ps) r(fun) ps

ilambda

Create an impure anonymous function.

• Param r: Return type of the lambda expression
• Param ps: Paramters of the lambda expression
• Param b: Body of the lambda expression, must be surrounded by curly braces

Returns: A pointer to an anonymous function with parameters ps, return-type r and body b

#	define ilambda(r, ps, b)                                                                                          \

lambda

Create a pure anonymous function.

• Param r: Return type of the lambda, cannot be void
• Param ps: Parameters of the lambda
• Param e: Expression of the body of the lambda, must have non-void type

Returns: A pointer to an anonymous function which takes ps and returns the value of e of type r

#	define lambda(r, ps, e)                                                                                           \

void

Lambda-friendly implementation of free.

• Param p: Pointer to memory to free

extern void(fun freel)(void* p);