func()

in syntax/parse.go [779:836]

• 52 lines of code
• 12 McCabe index (conditional complexity)

func (p *parser) parsePrimary() Expr {
	switch p.tok {
	case IDENT:
		return p.parseIdent()

	case INT, FLOAT, STRING, BYTES:
		var val interface{}
		tok := p.tok
		switch tok {
		case INT:
			if p.tokval.bigInt != nil {
				val = p.tokval.bigInt
			} else {
				val = p.tokval.int
			}
		case FLOAT:
			val = p.tokval.float
		case STRING, BYTES:
			val = p.tokval.string
		}
		raw := p.tokval.raw
		pos := p.nextToken()
		return &Literal{Token: tok, TokenPos: pos, Raw: raw, Value: val}

	case LBRACK:
		return p.parseList()

	case LBRACE:
		return p.parseDict()

	case LPAREN:
		lparen := p.nextToken()
		if p.tok == RPAREN {
			// empty tuple
			rparen := p.nextToken()
			return &TupleExpr{Lparen: lparen, Rparen: rparen}
		}
		e := p.parseExpr(true) // allow trailing comma
		rparen := p.consume(RPAREN)
		return &ParenExpr{
			Lparen: lparen,
			X:      e,
			Rparen: rparen,
		}

	case MINUS, PLUS, TILDE: // unary
		tok := p.tok
		pos := p.nextToken()
		x := p.parsePrimaryWithSuffix()
		return &UnaryExpr{
			OpPos: pos,
			Op:    tok,
			X:     x,
		}
	}
	p.in.errorf(p.in.pos, "got %#v, want primary expression", p.tok)
	panic("unreachable")
}