Vee lang

The Vee programming language

Playground

Usage

• <input_file>
• -t Print tokens
• -a Print AST
• -e Evaluate AST
• -c <output_runtime_script_file> Compile to Runtime Script

Example:

python3 main.py sample.vee -e -c out.runtime

AST

Node Definition

Node = Object{
    type: NodeType
    token: Object{
        value: string
        type: TokenType
        line: integer
        column: integer
    }
    children: Node[]
}

Node Types

Node Name	Meaning
IMPORT	import statement
EXPR_LIST	expression list
STMT_LIST	statement list
OPERATOR	operator
IDENT	identifier
VALUE	value
FUNC_CALL	function call
FUNC_DEF	function definition
ARG_LIST	argument list
FOR	for loop
WHILE	while loop
IF	if expression
RETURN	return statement
CLASS	class definition

Token Types

TypeType = Enum{
    KEY: keyword
    IDN: identifier
    NUM: number
    STR: string
    NEL: newline
    SYM: symbol
    EOF: end of file
}

Examples

Operator

Node{
    type: OPERATOR
    token: Token{
        value: '+'
        type: SYM
    }
    children: [
        Node{<operand>},
        Node{<operand>}
    ]
}

Identifier

Node{
    type: IDENT
    token: Token{
        value: 'my_var'
        type: IDN
    }
    children: []
}

Value

Node{
    type: VALUE
    token: Token{
        value: 24
        type: NUM
    }
    children: []
}