From 7b320119ba532fd409ec7dade7ad02011c309599 Mon Sep 17 00:00:00 2001 From: Niall Sheridan Date: Wed, 18 Oct 2017 13:15:14 +0100 Subject: Update dependencies --- vendor/github.com/pelletier/go-toml/queryparser.go | 275 --------------------- 1 file changed, 275 deletions(-) delete mode 100644 vendor/github.com/pelletier/go-toml/queryparser.go (limited to 'vendor/github.com/pelletier/go-toml/queryparser.go') diff --git a/vendor/github.com/pelletier/go-toml/queryparser.go b/vendor/github.com/pelletier/go-toml/queryparser.go deleted file mode 100644 index 1cbfc83..0000000 --- a/vendor/github.com/pelletier/go-toml/queryparser.go +++ /dev/null @@ -1,275 +0,0 @@ -/* - Based on the "jsonpath" spec/concept. - - http://goessner.net/articles/JsonPath/ - https://code.google.com/p/json-path/ -*/ - -package toml - -import ( - "fmt" -) - -const maxInt = int(^uint(0) >> 1) - -type queryParser struct { - flow chan token - tokensBuffer []token - query *Query - union []pathFn - err error -} - -type queryParserStateFn func() queryParserStateFn - -// Formats and panics an error message based on a token -func (p *queryParser) parseError(tok *token, msg string, args ...interface{}) queryParserStateFn { - p.err = fmt.Errorf(tok.Position.String()+": "+msg, args...) - return nil // trigger parse to end -} - -func (p *queryParser) run() { - for state := p.parseStart; state != nil; { - state = state() - } -} - -func (p *queryParser) backup(tok *token) { - p.tokensBuffer = append(p.tokensBuffer, *tok) -} - -func (p *queryParser) peek() *token { - if len(p.tokensBuffer) != 0 { - return &(p.tokensBuffer[0]) - } - - tok, ok := <-p.flow - if !ok { - return nil - } - p.backup(&tok) - return &tok -} - -func (p *queryParser) lookahead(types ...tokenType) bool { - result := true - buffer := []token{} - - for _, typ := range types { - tok := p.getToken() - if tok == nil { - result = false - break - } - buffer = append(buffer, *tok) - if tok.typ != typ { - result = false - break - } - } - // add the tokens back to the buffer, and return - p.tokensBuffer = append(p.tokensBuffer, buffer...) - return result -} - -func (p *queryParser) getToken() *token { - if len(p.tokensBuffer) != 0 { - tok := p.tokensBuffer[0] - p.tokensBuffer = p.tokensBuffer[1:] - return &tok - } - tok, ok := <-p.flow - if !ok { - return nil - } - return &tok -} - -func (p *queryParser) parseStart() queryParserStateFn { - tok := p.getToken() - - if tok == nil || tok.typ == tokenEOF { - return nil - } - - if tok.typ != tokenDollar { - return p.parseError(tok, "Expected '$' at start of expression") - } - - return p.parseMatchExpr -} - -// handle '.' prefix, '[]', and '..' -func (p *queryParser) parseMatchExpr() queryParserStateFn { - tok := p.getToken() - switch tok.typ { - case tokenDotDot: - p.query.appendPath(&matchRecursiveFn{}) - // nested parse for '..' - tok := p.getToken() - switch tok.typ { - case tokenKey: - p.query.appendPath(newMatchKeyFn(tok.val)) - return p.parseMatchExpr - case tokenLeftBracket: - return p.parseBracketExpr - case tokenStar: - // do nothing - the recursive predicate is enough - return p.parseMatchExpr - } - - case tokenDot: - // nested parse for '.' - tok := p.getToken() - switch tok.typ { - case tokenKey: - p.query.appendPath(newMatchKeyFn(tok.val)) - return p.parseMatchExpr - case tokenStar: - p.query.appendPath(&matchAnyFn{}) - return p.parseMatchExpr - } - - case tokenLeftBracket: - return p.parseBracketExpr - - case tokenEOF: - return nil // allow EOF at this stage - } - return p.parseError(tok, "expected match expression") -} - -func (p *queryParser) parseBracketExpr() queryParserStateFn { - if p.lookahead(tokenInteger, tokenColon) { - return p.parseSliceExpr - } - if p.peek().typ == tokenColon { - return p.parseSliceExpr - } - return p.parseUnionExpr -} - -func (p *queryParser) parseUnionExpr() queryParserStateFn { - var tok *token - - // this state can be traversed after some sub-expressions - // so be careful when setting up state in the parser - if p.union == nil { - p.union = []pathFn{} - } - -loop: // labeled loop for easy breaking - for { - if len(p.union) > 0 { - // parse delimiter or terminator - tok = p.getToken() - switch tok.typ { - case tokenComma: - // do nothing - case tokenRightBracket: - break loop - default: - return p.parseError(tok, "expected ',' or ']', not '%s'", tok.val) - } - } - - // parse sub expression - tok = p.getToken() - switch tok.typ { - case tokenInteger: - p.union = append(p.union, newMatchIndexFn(tok.Int())) - case tokenKey: - p.union = append(p.union, newMatchKeyFn(tok.val)) - case tokenString: - p.union = append(p.union, newMatchKeyFn(tok.val)) - case tokenQuestion: - return p.parseFilterExpr - default: - return p.parseError(tok, "expected union sub expression, not '%s', %d", tok.val, len(p.union)) - } - } - - // if there is only one sub-expression, use that instead - if len(p.union) == 1 { - p.query.appendPath(p.union[0]) - } else { - p.query.appendPath(&matchUnionFn{p.union}) - } - - p.union = nil // clear out state - return p.parseMatchExpr -} - -func (p *queryParser) parseSliceExpr() queryParserStateFn { - // init slice to grab all elements - start, end, step := 0, maxInt, 1 - - // parse optional start - tok := p.getToken() - if tok.typ == tokenInteger { - start = tok.Int() - tok = p.getToken() - } - if tok.typ != tokenColon { - return p.parseError(tok, "expected ':'") - } - - // parse optional end - tok = p.getToken() - if tok.typ == tokenInteger { - end = tok.Int() - tok = p.getToken() - } - if tok.typ == tokenRightBracket { - p.query.appendPath(newMatchSliceFn(start, end, step)) - return p.parseMatchExpr - } - if tok.typ != tokenColon { - return p.parseError(tok, "expected ']' or ':'") - } - - // parse optional step - tok = p.getToken() - if tok.typ == tokenInteger { - step = tok.Int() - if step < 0 { - return p.parseError(tok, "step must be a positive value") - } - tok = p.getToken() - } - if tok.typ != tokenRightBracket { - return p.parseError(tok, "expected ']'") - } - - p.query.appendPath(newMatchSliceFn(start, end, step)) - return p.parseMatchExpr -} - -func (p *queryParser) parseFilterExpr() queryParserStateFn { - tok := p.getToken() - if tok.typ != tokenLeftParen { - return p.parseError(tok, "expected left-parenthesis for filter expression") - } - tok = p.getToken() - if tok.typ != tokenKey && tok.typ != tokenString { - return p.parseError(tok, "expected key or string for filter funciton name") - } - name := tok.val - tok = p.getToken() - if tok.typ != tokenRightParen { - return p.parseError(tok, "expected right-parenthesis for filter expression") - } - p.union = append(p.union, newMatchFilterFn(name, tok.Position)) - return p.parseUnionExpr -} - -func parseQuery(flow chan token) (*Query, error) { - parser := &queryParser{ - flow: flow, - tokensBuffer: []token{}, - query: newQuery(), - } - parser.run() - return parser.query, parser.err -} -- cgit v1.2.3