Writing an Interpreter just for fun
const (
ILLEGAL = "ILLEGAL"
EOF = "EOF"
// Keywords
LET = "LET"
FUNCTION = "FUNCTION"
TRUE = "TRUE"
FALSE = "FALSE"
IF = "IF"
ELSE = "ELSE"
RETURN = "RETURN"
// Identifiers & literals
IDENT = "IDENTIFIER"
INT = "INTEGER"
// Operators
ASSIGN = "="
PLUS = "+"
MINUS = "-"
ASTERISK = "*"
SLASH = "/"
NOT = "!"
LT = "<"
GT = ">"
EQ = "=="
NOT_EQ = "!="
// Delimiters
LPAREN = "("
RPAREN = ")"
LBRACE = "{"
RBRACE = "}"
COMMA = ","
SEMICOLON = ";"
);
var keywords = map[string] TokenType{
"fn": FUNCTION,
"let": LET,
"true": TRUE,
"false": FALSE,
"if": IF,
"else": ELSE,
"return": RETURN,
}let a = 2;
let b = 32;
let add = fn(a, b) {
a + b;
};
let result = add(a, b);
if (a < b) {
return true;
} else {
return false;
}
10 == 10;
10 != 9;