R4d (Rad)

R4d is a text oriented macro prosessor made with rust.

R4d is in very early stage, so there might be lots of undetected bugs.

Syntax

Macro definition

Definition is also a macro. However it requires specifid form not like other macros

// Define with simple form // First argument is macro name // Second argument is whitespace separated macro's argument list // Third argument is body to be substituted // Body can express argument usage with macro usage $define(name,arg1 arg2, $arg1() $arg2())

Macro inovokation

Prefix is a dollar sign($) $define(macro_name,a1 a2, $a1() $a2()) $macro_name(arg1, arg2) Macro can be invoked anywhere

My name is $macro_name(Simon, Creek). converts to My name is Simon Creek.

Goal

R4d aims to be a modern m4 alternative, which means

• No trivial quotes for macro definition
• Explicit rule for macro definition and usage so that de facto underscore rule is not necessary
• Easier binding with other programming languages
• Enable combination of file stream and stdout
• As expressive as current m4 macro processor

In-built macros(WIP)

• define
• undefine
• include
• repeat
• for each
• for loop
• if else
• system command
• regex sub and del
• evaluation
• trim, chomp, compress
• placeholder(lipsum)
• time, date
• ifdefine