An implementation of a simple language (with the goal of) using LLVM for code generation. Originally, I began this project as a quick way to learn the fundamentals of LLVM, but I became wrapped up in implementing the start of a module system, extensible error reporting, and the tokenization of numeric literals in binary, octal, decimal, and hexadecimal form.
I am unsure of the final shape that the language will take. In the frontend tutorial that inspired this project, Kaleidoscope has 64-bit floats as its sole datatype and therefore requires no type annotations. I would like to add support for integer and string types, but I am unsure if the language will be dynamically or statically typed. Additionally, I envision an OCaml-like module system for the language where each file is a module and each module has a signature that defines its public interface.
- Compiler that supports C++20
- fmt >= 8.1.1
- LLVM development libraries (not yet required to build)
<expression> ::= <add-expression>
<add-expression> ::= <multiply-expression> (("+" | "-") <multiply-expression)*
<multiply-expression> ::= <prefix-expression> (("*" | "/") <prefix-expression>)*
<prefix-expression> ::= ("-" | "!") <primary-expression>
<primary-expression> ::= <ident>
| <number>
| "(" <expression> ")"
<ident> ::= (<alpha> | "_") (<alpha> | "_" | <dec>)*
<alpha> ::= "a" .. "z" | "A" .. "Z"
<number> ::= <int-lit> | <float-lit>
<float-lit> ::= <dec-int> "." <dec-int> [("e" | "E") ["+" | "-"] <dec-int>]
| <hex-int> "." <hex> (["_"] hex)* [("p" | "P") ["+" | "-"] <dec-int>]
| <dec-int> ("e" | "E") ["+" | "-"] <dec-int>
| <hex-int> ("p" | "P") ["+" | "-"] <dec-int>
<int-lit> ::= <dec-int>
| <hex-int>
| <oct-int>
| <bin-int>
<dec-int> ::= <dec> (["_"] <dec>)*
<hex-int> ::= "0" ("x" | "X") (["_"] <hex>)+
<oct-int> ::= "0" ("o" | "O") (["_"] <oct>)+
<bin-int> ::= "0" ("b" | "B") (["_"] <bin>)+
<hex> ::= <dec> | "a" .. "f" | "A" .. "F"
<dec> ::= "0" .. "9"
<oct> ::= "0" .. "7"
<bin> ::= "0" | "1"
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