const DefaultProgramName … const ProgramInitSize … const MinTokenIndex … type RewriteOperation … type BaseRewriteOperation … func (op *BaseRewriteOperation) GetInstructionIndex() int { … } func (op *BaseRewriteOperation) GetIndex() int { … } func (op *BaseRewriteOperation) GetText() string { … } func (op *BaseRewriteOperation) GetOpName() string { … } func (op *BaseRewriteOperation) GetTokens() TokenStream { … } func (op *BaseRewriteOperation) SetInstructionIndex(val int) { … } func (op *BaseRewriteOperation) SetIndex(val int) { … } func (op *BaseRewriteOperation) SetText(val string) { … } func (op *BaseRewriteOperation) SetOpName(val string) { … } func (op *BaseRewriteOperation) SetTokens(val TokenStream) { … } func (op *BaseRewriteOperation) Execute(_ *bytes.Buffer) int { … } func (op *BaseRewriteOperation) String() string { … } type InsertBeforeOp … func NewInsertBeforeOp(index int, text string, stream TokenStream) *InsertBeforeOp { … } func (op *InsertBeforeOp) Execute(buffer *bytes.Buffer) int { … } func (op *InsertBeforeOp) String() string { … } type InsertAfterOp … func NewInsertAfterOp(index int, text string, stream TokenStream) *InsertAfterOp { … } func (op *InsertAfterOp) Execute(buffer *bytes.Buffer) int { … } func (op *InsertAfterOp) String() string { … } type ReplaceOp … func NewReplaceOp(from, to int, text string, stream TokenStream) *ReplaceOp { … } func (op *ReplaceOp) Execute(buffer *bytes.Buffer) int { … } func (op *ReplaceOp) String() string { … } type TokenStreamRewriter … func NewTokenStreamRewriter(tokens TokenStream) *TokenStreamRewriter { … } func (tsr *TokenStreamRewriter) GetTokenStream() TokenStream { … } // Rollback the instruction stream for a program so that // the indicated instruction (via instructionIndex) is no // longer in the stream. UNTESTED! func (tsr *TokenStreamRewriter) Rollback(programName string, instructionIndex int) { … } func (tsr *TokenStreamRewriter) RollbackDefault(instructionIndex int) { … } // DeleteProgram Reset the program so that no instructions exist func (tsr *TokenStreamRewriter) DeleteProgram(programName string) { … } func (tsr *TokenStreamRewriter) DeleteProgramDefault() { … } func (tsr *TokenStreamRewriter) InsertAfter(programName string, index int, text string) { … } func (tsr *TokenStreamRewriter) InsertAfterDefault(index int, text string) { … } func (tsr *TokenStreamRewriter) InsertAfterToken(programName string, token Token, text string) { … } func (tsr *TokenStreamRewriter) InsertBefore(programName string, index int, text string) { … } func (tsr *TokenStreamRewriter) InsertBeforeDefault(index int, text string) { … } func (tsr *TokenStreamRewriter) InsertBeforeToken(programName string, token Token, text string) { … } func (tsr *TokenStreamRewriter) Replace(programName string, from, to int, text string) { … } func (tsr *TokenStreamRewriter) ReplaceDefault(from, to int, text string) { … } func (tsr *TokenStreamRewriter) ReplaceDefaultPos(index int, text string) { … } func (tsr *TokenStreamRewriter) ReplaceToken(programName string, from, to Token, text string) { … } func (tsr *TokenStreamRewriter) ReplaceTokenDefault(from, to Token, text string) { … } func (tsr *TokenStreamRewriter) ReplaceTokenDefaultPos(index Token, text string) { … } func (tsr *TokenStreamRewriter) Delete(programName string, from, to int) { … } func (tsr *TokenStreamRewriter) DeleteDefault(from, to int) { … } func (tsr *TokenStreamRewriter) DeleteDefaultPos(index int) { … } func (tsr *TokenStreamRewriter) DeleteToken(programName string, from, to Token) { … } func (tsr *TokenStreamRewriter) DeleteTokenDefault(from, to Token) { … } func (tsr *TokenStreamRewriter) GetLastRewriteTokenIndex(programName string) int { … } func (tsr *TokenStreamRewriter) GetLastRewriteTokenIndexDefault() int { … } func (tsr *TokenStreamRewriter) SetLastRewriteTokenIndex(programName string, i int) { … } func (tsr *TokenStreamRewriter) InitializeProgram(name string) []RewriteOperation { … } func (tsr *TokenStreamRewriter) AddToProgram(name string, op RewriteOperation) { … } func (tsr *TokenStreamRewriter) GetProgram(name string) []RewriteOperation { … } // GetTextDefault returns the text from the original tokens altered per the // instructions given to this rewriter. func (tsr *TokenStreamRewriter) GetTextDefault() string { … } // GetText returns the text from the original tokens altered per the // instructions given to this rewriter. func (tsr *TokenStreamRewriter) GetText(programName string, interval Interval) string { … } // reduceToSingleOperationPerIndex combines operations and report invalid operations (like // overlapping replaces that are not completed nested). Inserts to // same index need to be combined etc... // // Here are the cases: // // I.i.u I.j.v leave alone, non-overlapping // I.i.u I.i.v combine: Iivu // // R.i-j.u R.x-y.v | i-j in x-y delete first R // R.i-j.u R.i-j.v delete first R // R.i-j.u R.x-y.v | x-y in i-j ERROR // R.i-j.u R.x-y.v | boundaries overlap ERROR // // Delete special case of replace (text==null): // D.i-j.u D.x-y.v | boundaries overlap combine to max(min)..max(right) // // I.i.u R.x-y.v | i in (x+1)-y delete I (since insert before // we're not deleting i) // I.i.u R.x-y.v | i not in (x+1)-y leave alone, non-overlapping // R.x-y.v I.i.u | i in x-y ERROR // R.x-y.v I.x.u R.x-y.uv (combine, delete I) // R.x-y.v I.i.u | i not in x-y leave alone, non-overlapping // // I.i.u = insert u before op @ index i // R.x-y.u = replace x-y indexed tokens with u // // First we need to examine replaces. For any replace op: // // 1. wipe out any insertions before op within that range. // 2. Drop any replace op before that is contained completely within // that range. // 3. Throw exception upon boundary overlap with any previous replace. // // Then we can deal with inserts: // // 1. for any inserts to same index, combine even if not adjacent. // 2. for any prior replace with same left boundary, combine this // insert with replace and delete this 'replace'. // 3. throw exception if index in same range as previous replace // // Don't actually delete; make op null in list. Easier to walk list. // Later we can throw as we add to index → op map. // // Note that I.2 R.2-2 will wipe out I.2 even though, technically, the // inserted stuff would be before the 'replace' range. But, if you // add tokens in front of a method body '{' and then delete the method // body, I think the stuff before the '{' you added should disappear too. // // The func returns a map from token index to operation. func reduceToSingleOperationPerIndex(rewrites []RewriteOperation) map[int]RewriteOperation { … } func max(a, b int) int { … } func min(a, b int) int { … }
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