기본 식

기본 식은 단항 식과 이항 식의 피연산자다.

PrimaryExpr =
    Operand |
    Conversion |
    PrimaryExpr Selector |
    PrimaryExpr Index |
    PrimaryExpr Slice |
    PrimaryExpr TypeAssertion |
    PrimaryExpr Arguments .

Selector       = "." identifier .
Index          = "[" Expression "]" .
Slice          = "[" [ Expression ] ":" [ Expression ] "]" |
                 "[" [ Expression ] ":" Expression ":" Expression "]" .
TypeAssertion  = "." "(" Type ")" .
Arguments      = "(" [ ( ExpressionList | Type [ "," ExpressionList ] ) [ "..." ] [ "," ] ] ")" .

x
2
(s + ".txt")
f(3.1415, true)
Point{1, 2}
m["foo"]
s[i : j + 1]
obj.color
f.p[i].x()