71 lines
1.9 KiB
Markdown
71 lines
1.9 KiB
Markdown
# NEK-Lang
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## High level Components
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- [x] Lexer: Transforms text into Tokens
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- [x] Parser: Transforms Tokens into Abstract Syntax Tree
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- [x] Interpreter (tree-walk-interpreter): Walks the tree and evaluates the expressions / statements
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- [ ] Abstract Syntax Tree Optimizer
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## Language features
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- [x] General expressions
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- [x] Arithmetic operations
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- [x] Addition `X+Y`
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- [x] Subtraction `X-Y`
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- [x] Multiplication `X*Y`
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- [x] Division `X/Y`
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- [x] Modulo `X%Y`
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- [x] Unary operators
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- [x] Negate `-X`
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- [x] Parentheses `(X+Y)*Z`
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- [x] Logical boolean operators
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- [x] Equal `==`
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- [x] Not equal `!=`
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- [x] Greater than `>`
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- [x] Less than `<`
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- [x] Greater than or equal `>=`
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- [x] Less than or equal `<=`
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- [x] Bitwise operators
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- [x] Bitwise AND `X&Y`
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- [x] Bitwise OR `X|Y`
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- [x] Bitwise XOR `X^Y`
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- [x] Bitwise NOT `~X`
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- [x] Bitwise left shift `X<<Y`
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- [x] Bitwise right shift `X>>Y`
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- [x] Variables
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- [x] Declaration
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- [x] Assignment
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- [x] Statements with semicolon & Multiline programs
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- [ ] Control flow
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- [ ] While loop `while X { ... }`
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- [ ] If else statement `if X { ... } else { ... }`
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- [ ] If Statement
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- [ ] Else statement
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- [ ] Line comments `//`
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- [ ] Strings
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- [ ] IO Intrinsics
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- [ ] Print
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- [ ] ReadLine
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## Grammar
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### Expressions
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```
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expr_primary = LITERAL | IDENT | "(" expr ")" | "-" expr_primary | "~" expr_primary
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expr_mul = expr_primary (("*" | "/" | "%") expr_primary)*
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expr_add = expr_mul (("+" | "-") expr_mul)*
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expr_shift = expr_add ((">>" | "<<") expr_add)*
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expr_rel = expr_shift ((">" | ">=" | "<" | "<=") expr_shift)*
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expr_equ = expr_rel (("==" | "!=") expr_rel)*
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expr_band = expr_equ ("&" expr_equ)*
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expr_bxor = expr_band ("^" expr_band)*
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expr_bor = expr_bxor ("|" expr_bxor)*
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expr = expr_bor
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```
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### Statements
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```
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stmt_expr = expr ";"
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stmt = stmt_expr
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``` |