Method ParseMatchExpr

pkg/matchparser/match_parser.go:29–68

ParseMatchExpr parses a complete match expression Grammar: 'match' scrutinee '{' arm* '}'

()

// ParseMatchExpr parses a complete match expression
// Grammar: 'match' scrutinee '{' arm* '}'
func (p *MatchParser) ParseMatchExpr() (*ast.MatchExpr, error) {
	matchTok, err := p.tok.Expect(tokenizer.MATCH)
	if err != nil {
		return nil, err
	}

	// Parse scrutinee expression (everything until '{')
	scrutinee, err := p.parseScrutinee()
	if err != nil {
		return nil, err
	}

	openBrace, err := p.tok.Expect(tokenizer.LBRACE)
	if err != nil {
		return nil, err
	}

	// Parse arms
	arms, comments, err := p.parseArms()
	if err != nil {
		return nil, err
	}

	closeBrace, err := p.tok.Expect(tokenizer.RBRACE)
	if err != nil {
		return nil, err
	}

	p.matchIDGen++

	return &ast.MatchExpr{
		Match:      matchTok.Pos,
		Scrutinee:  scrutinee,
		OpenBrace:  openBrace.Pos,
		Arms:       arms,
		CloseBrace: closeBrace.Pos,
		MatchID:    p.matchIDGen,
		Comments:   comments,
	}, nil
}

// parseScrutinee parses the expression being matched
func (p *MatchParser) parseScrutinee() (ast.Expr, error) {