| 58 | } |
| 59 | |
| 60 | func (p *Parser) Parse(input string, config *conf.Config) (*Tree, error) { |
| 61 | if p.lexer == nil { |
| 62 | p.lexer = New() |
| 63 | } |
| 64 | p.config = config |
| 65 | // propagate config flags to lexer |
| 66 | if p.lexer != nil { |
| 67 | if config != nil { |
| 68 | p.lexer.DisableIfOperator = config.DisableIfOperator |
| 69 | } else { |
| 70 | p.lexer.DisableIfOperator = false |
| 71 | } |
| 72 | } |
| 73 | source := file.NewSource(input) |
| 74 | p.lexer.Reset(source) |
| 75 | p.next() |
| 76 | node := p.parseSequenceExpression() |
| 77 | |
| 78 | if !p.current.Is(EOF) { |
| 79 | p.error("unexpected token %v", p.current) |
| 80 | } |
| 81 | |
| 82 | tree := &Tree{ |
| 83 | Node: node, |
| 84 | Source: source, |
| 85 | } |
| 86 | err := p.err |
| 87 | |
| 88 | // cleanup non-reusable pointer values and reset state |
| 89 | p.err = nil |
| 90 | p.config = nil |
| 91 | p.lexer.Reset(file.Source{}) |
| 92 | |
| 93 | if err != nil { |
| 94 | return tree, err.Bind(source) |
| 95 | } |
| 96 | |
| 97 | return tree, nil |
| 98 | } |
| 99 | |
| 100 | func (p *Parser) checkNodeLimit() error { |
| 101 | p.nodeCount++ |