HeartScript

C-like IL compiled custom language

Functionality

• Control-flow (if-else, for loop, while loop, do while loop)
• Primtive types int, double, bool
• Arrays
• Methods, Method Overloading
• .NET Method injection
• Arithmetic Operators

Example

dotnet run --project ./src/HeartScript.Cli ./src/demo.hs

• Quicksort implementation demo.hs
• Grammar used to parse the language demo.hg

How it works

• Generate a Parse Tree using Heart.Parsing
• Rewrite Parse Tree into an Abstract Syntax Tree
• Emit IL while traversing Abstract Syntax Tree

Missing things

• User friendly error reporting, invalid operations will not provide the relevant location in the source file
• Definite assignment analysis No error checking for definite assignment, variables are initialized to their default value
• Data-flow analysis No error checking for returns values (returns default value of method return type)

Further Reading

• https://docs.microsoft.com/en-us/dotnet/framework/reflection-and-codedom/how-to-define-a-generic-type-with-reflection-emit
• https://docs.microsoft.com/en-us/dotnet/api/system.reflection.emit.opcodes