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Fixes nested array indexing #824

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This commit is contained in:
Mike Farah 2021-05-21 14:18:24 +10:00
parent 77edbb9f5c
commit d18a6963f6
4 changed files with 47 additions and 3 deletions
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8
pkg/yqlib/expression_postfix.go
View File

@ -54,7 +54,7 @@ func (p *expressionPostFixerImpl) ConvertToPostfix(infixTokens []*token) ([]*Ope
opStack = opStack[0 : len(opStack)-1]
log.Debugf("deleteing open bracket from opstack")
//and append a collect to the opStack
//and append a collect to the result
// hack - see if there's the optional traverse flag
// on the close op - move it to the collect op.
// allows for .["cat"]?
@ -68,6 +68,12 @@ func (p *expressionPostFixerImpl) ConvertToPostfix(infixTokens []*token) ([]*Ope
result = append(result, &Operation{OperationType: shortPipeOpType})
log.Debugf("put shortpipe onto the result")
//traverseArrayCollect is a sneaky op that needs to be included too
//when closing a []
if len(opStack) > 0 && opStack[len(opStack)-1].Operation != nil && opStack[len(opStack)-1].Operation.OperationType == traverseArrayOpType {
opStack, result = popOpToResult(opStack, result)
}
case closeBracket:
for len(opStack) > 0 && opStack[len(opStack)-1].TokenType != openBracket {
opStack, result = popOpToResult(opStack, result)

10
pkg/yqlib/expression_processing_test.go
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@ -12,6 +12,16 @@ var pathTests = []struct {
expectedTokens []interface{}
expectedPostFix []interface{}
}{
{
`.[0]`,
append(make([]interface{}, 0), "SELF", "TRAVERSE_ARRAY", "[", "0 (int64)", "]"),
append(make([]interface{}, 0), "SELF", "0 (int64)", "COLLECT", "SHORT_PIPE", "TRAVERSE_ARRAY"),
},
{
`.[0][1]`,
append(make([]interface{}, 0), "SELF", "TRAVERSE_ARRAY", "[", "0 (int64)", "]", "TRAVERSE_ARRAY", "[", "1 (int64)", "]"),
append(make([]interface{}, 0), "SELF", "0 (int64)", "COLLECT", "SHORT_PIPE", "TRAVERSE_ARRAY", "1 (int64)", "COLLECT", "SHORT_PIPE", "TRAVERSE_ARRAY"),
},
{
`"\""`,
append(make([]interface{}, 0), "\" (string)"),

16
pkg/yqlib/expression_tokeniser.go
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@ -411,16 +411,19 @@ func (p *expressionTokeniserImpl) handleToken(tokens []*token, index int, postPr
skipNextToken = false
currentToken := tokens[index]
log.Debug("processing %v", currentToken.toString(true))
if currentToken.TokenType == traverseArrayCollect {
//need to put a traverse array then a collect currentToken
// do this by adding traverse then converting currentToken to collect
if index == 0 || tokens[index-1].TokenType != operationToken ||
tokens[index-1].Operation.OperationType != traversePathOpType {
log.Debug(" adding self")
op := &Operation{OperationType: selfReferenceOpType, StringValue: "SELF"}
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: op})
}
log.Debug(" adding traverse array")
op := &Operation{OperationType: traverseArrayOpType, StringValue: "TRAVERSE_ARRAY"}
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: op})
@ -431,17 +434,19 @@ func (p *expressionTokeniserImpl) handleToken(tokens []*token, index int, postPr
if index != len(tokens)-1 && currentToken.AssignOperation != nil &&
tokens[index+1].TokenType == operationToken &&
tokens[index+1].Operation.OperationType == assignOpType {
log.Debug(" its an update assign")
currentToken.Operation = currentToken.AssignOperation
currentToken.Operation.UpdateAssign = tokens[index+1].Operation.UpdateAssign
skipNextToken = true
}
log.Debug(" adding token to the fixed list")
postProcessedTokens = append(postProcessedTokens, currentToken)
if index != len(tokens)-1 &&
((currentToken.TokenType == openCollect && tokens[index+1].TokenType == closeCollect) ||
(currentToken.TokenType == openCollectObject && tokens[index+1].TokenType == closeCollectObject)) {
log.Debug(" adding empty")
op := &Operation{OperationType: emptyOpType, StringValue: "EMPTY"}
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: op})
}
@ -449,12 +454,19 @@ func (p *expressionTokeniserImpl) handleToken(tokens []*token, index int, postPr
if index != len(tokens)-1 && currentToken.CheckForPostTraverse &&
tokens[index+1].TokenType == operationToken &&
tokens[index+1].Operation.OperationType == traversePathOpType {
log.Debug(" adding pipe because the next thing is traverse")
op := &Operation{OperationType: shortPipeOpType, Value: "PIPE"}
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: op})
}
if index != len(tokens)-1 && currentToken.CheckForPostTraverse &&
tokens[index+1].TokenType == openCollect {
// if tokens[index].TokenType == closeCollect {
// log.Debug(" adding pipe because next is opencollect")
// op := &Operation{OperationType: shortPipeOpType, Value: "PIPE"}
// postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: op})
// }
log.Debug(" adding traverArray because next is opencollect")
op := &Operation{OperationType: traverseArrayOpType}
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: op})
}

16
pkg/yqlib/operator_traverse_path_test.go
View File

@ -27,6 +27,22 @@ foobar:
`
var traversePathOperatorScenarios = []expressionScenario{
{
skipDoc: true,
document: `[[1]]`,
expression: `.[0][0]`,
expected: []string{
"D0, P[0 0], (!!int)::1\n",
},
},
{
skipDoc: true,
document: `[[[1]]]`,
expression: `.[0][0][0]`,
expected: []string{
"D0, P[0 0 0], (!!int)::1\n",
},
},
{
description: "Simple map navigation",
document: `{a: {b: apple}}`,