func()

in syntax/parse.go [316:379]

• 55 lines of code
• 11 McCabe index (conditional complexity)

func (p *parser) parseLoadStmt() *LoadStmt {
	loadPos := p.nextToken() // consume LOAD
	lparen := p.consume(LPAREN)

	if p.tok != STRING {
		p.in.errorf(p.in.pos, "first operand of load statement must be a string literal")
	}
	module := p.parsePrimary().(*Literal)

	var from, to []*Ident
	for p.tok != RPAREN && p.tok != EOF {
		p.consume(COMMA)
		if p.tok == RPAREN {
			break // allow trailing comma
		}
		switch p.tok {
		case STRING:
			// load("module", "id")
			// To name is same as original.
			lit := p.parsePrimary().(*Literal)
			id := &Ident{
				NamePos: lit.TokenPos.add(`"`),
				Name:    lit.Value.(string),
			}
			to = append(to, id)
			from = append(from, id)

		case IDENT:
			// load("module", to="from")
			id := p.parseIdent()
			to = append(to, id)
			if p.tok != EQ {
				p.in.errorf(p.in.pos, `load operand must be "%[1]s" or %[1]s="originalname" (want '=' after %[1]s)`, id.Name)
			}
			p.consume(EQ)
			if p.tok != STRING {
				p.in.errorf(p.in.pos, `original name of loaded symbol must be quoted: %s="originalname"`, id.Name)
			}
			lit := p.parsePrimary().(*Literal)
			from = append(from, &Ident{
				NamePos: lit.TokenPos.add(`"`),
				Name:    lit.Value.(string),
			})

		case RPAREN:
			p.in.errorf(p.in.pos, "trailing comma in load statement")

		default:
			p.in.errorf(p.in.pos, `load operand must be "name" or localname="name" (got %#v)`, p.tok)
		}
	}
	rparen := p.consume(RPAREN)

	if len(to) == 0 {
		p.in.errorf(lparen, "load statement must import at least 1 symbol")
	}
	return &LoadStmt{
		Load:   loadPos,
		Module: module,
		To:     to,
		From:   from,
		Rparen: rparen,
	}
}