mash-py

Prototype interpreter for Mash language.

Be warned that the interpreter is quite slow and poorly optimized, it was created mostly to test the language make the final interpreter build on this.

Mash language

Dynamically typed language (with some optional typing features) for easy prototyping, writing one liners, but also bigger size scripts and programs.

Mash aims to be consistent and friendly to begginers, but at the same time allow for some higher lever techniques.

Syntax

Examples of mash the code can be seen in the examples folder.

In Mash semicolons work just like new lines and vice versa, meaning that when you're writing one liners, you can replace new lines with semicolons and in case of writing multiline code, you can omit semicolons.

Mash uses brackets ({ and }) for code structuring and not indentations.

Mash has support for object oriented programming (OOP) and offers namespaces as well for the ease of code organization.

Even though Mash is dynamically typed language, implicit conversions are quite strict to help quickly discover incorrect code and to help with the readability of the code.

Operators

Operator	Description	Associativity
::	Scope resolution (class or space element selection)	Left
()	Function call	Left
[]	List Selection	Left
.	Objecy element selection	Left
+, -	Unary + and -	Right
^	Exponentiation	Right
*, /, //, %	Multiplication, Division, Floor division, Modulo	Left
+, -	Addition, Subtraction	Left
++	Concatenation	Left
..	List range constructor	Left
in	Membership	Left
<=, >=, >, <	Comparisons	Left
==, !=	Equals, Not equals	Left
!, not	Logical not	Right
&&, and	Short-circuit type checked/not checked logical and	Left
||, or	Short-circuit type checked/not checked logical or	Left
?:	Ternary if	Right
=, +=, -=, *=, /=, //=, %=, ^=, ++=	Assignment, Operation and assignment	Right
~	Silence operator	Right

Keywords

Keyword	Description
if, elif, else	If statement
break, continue	Flow controls
do, while, for	Loops
import, as	Module import
return	Function return
raise	Exception generation
try, catch, finally	Exception handeling
nil	No value type
true, false	Boolean values
fun	Function
class	Class
space	Namespace
internal	Internal implementation

Types and values

• 42, 0x2A, 0x2a - Positive integers
• -42, -0xFfa - Negative integers
• 10_000 - Integer with formatting (10000)
• 3.14159, .001, 3e-8, 0.33E+8 - Floats
• true, false - Booleans
• nil - No value
• "text", f"text {foo}", r"new line: \n" - String

Strings

Escape characters start with \ can be one of the following:

• \\ - Backslash (\).
• \" - Double quote (").
• \a - Alarm/Bell character.
• \b - Backspace character.
• \f - Form feed (new page).
• \n - Mew line (line feed).
• \r - Carriage return.
• \t - Horizontal tab.
• \v - Vertical tab.