diff options
Diffstat (limited to 'walk/walk.go')
| -rw-r--r-- | walk/walk.go | 135 |
1 files changed, 1 insertions, 134 deletions
diff --git a/walk/walk.go b/walk/walk.go index 6e86877..1073c67 100644 --- a/walk/walk.go +++ b/walk/walk.go @@ -1,18 +1,14 @@ package walk import ( - "fmt" "strings" "math" "unicode/utf8" - "bufio" ) // int or string type PathSegment interface {} -func stringPathSegment(segment PathSegment) string { - return fmt.Sprintf("%v", segment) -} + type Path []PathSegment func (path Path) ToWalkValues() []Value { var values []Value @@ -49,135 +45,6 @@ type WalkItem struct { Path []Atom } -type JSONOutStructure int -const ( - JSONOutRoot JSONOutStructure = iota - JSONOutMap - JSONOutArray - JSONOutString - JSONOutValueEnd -) - -type JSONOut struct { - structure []JSONOutStructure - writer *bufio.Writer -} - -func (out *JSONOut) indent(adjust int) { - fmt.Fprint(out.writer, strings.Repeat("\t", len(out.structure) - 1 + adjust)) -} - -func (out *JSONOut) atomOut(key string, atom Atom) { - state := out.structure[len(out.structure) - 1] - switch state { - case JSONOutRoot, JSONOutMap, JSONOutArray: - switch atom.Typ { - case AtomNull, AtomBool, AtomNumber: - out.indent(0) - if state == JSONOutMap { - fmt.Fprintf(out.writer, "%q: ", key) - } - fmt.Fprint(out.writer, atom.String()) - out.structure = append(out.structure, JSONOutValueEnd) - case AtomStringTerminal: - out.indent(0) - if state == JSONOutMap { - fmt.Fprintf(out.writer, "%q: ", key) - } - fmt.Fprint(out.writer, "\"") - out.structure = append(out.structure, JSONOutString) - case AtomTerminal: - switch ValueTerminal(atom.data) { - case MapBegin: - out.indent(0) - if state == JSONOutMap { - fmt.Fprintf(out.writer, "%q: ", key) - } - fmt.Fprint(out.writer, "{\n") - out.structure = append(out.structure, JSONOutMap) - case ArrayBegin: - out.indent(0) - if state == JSONOutMap { - fmt.Fprintf(out.writer, "%q: ", key) - } - fmt.Fprint(out.writer, "[\n") - out.structure = append(out.structure, JSONOutArray) - case MapEnd: - out.indent(-1) - if state != JSONOutMap { - panic("Map ended while not inside a map") - } - fmt.Fprint(out.writer, "}") - out.structure[len(out.structure) - 1] = JSONOutValueEnd - case ArrayEnd: - out.indent(-1) - if state != JSONOutArray { - panic("Array ended while not inside a array") - } - fmt.Fprint(out.writer, "]") - out.structure[len(out.structure) - 1] = JSONOutValueEnd - default: - panic("Invalid TerminalValue") - } - default: - panic("Invalid AtomType in root value") - } - case JSONOutValueEnd: - out.structure = out.structure[:len(out.structure) - 1] - underState := out.structure[len(out.structure) - 1] - if underState == JSONOutMap && atom.Typ == AtomTerminal && ValueTerminal(atom.data) == MapEnd { - fmt.Fprint(out.writer, "\n") - out.indent(-1) - fmt.Fprint(out.writer, "}") - out.structure[len(out.structure) - 1] = JSONOutValueEnd - } else if underState == JSONOutArray && atom.Typ == AtomTerminal && ValueTerminal(atom.data) == ArrayEnd { - fmt.Fprint(out.writer, "\n") - out.indent(-1) - fmt.Fprint(out.writer, "]") - out.structure[len(out.structure) - 1] = JSONOutValueEnd - } else if underState == JSONOutRoot { - panic("Tried to output JSON after root value has concluded") - } else { - fmt.Fprint(out.writer, ",\n") - out.atomOut(key, atom) - } - case JSONOutString: - if atom.Typ == AtomStringTerminal { - fmt.Fprint(out.writer, "\"") - out.structure[len(out.structure) - 1] = JSONOutValueEnd - } else { - fmt.Fprint(out.writer, atom.String()) - } - default: - panic("Invalid JSONOutState") - } -} - -func (out *JSONOut) Print(path Path, values []Atom) { - var segment PathSegment - if len(path) > 0 { - segment = path[len(path) - 1] - } - segmentString := stringPathSegment(segment) - for _, atom := range values { - out.atomOut(segmentString, atom) - } -} - -func (out *JSONOut) AssertDone() { - out.writer.Flush() - if len(out.structure) != 2 || out.structure[0] != JSONOutRoot || out.structure[1] != JSONOutValueEnd { - panic("Program ended with incomplete JSON output") - } -} - -func NewJSONOut(writer *bufio.Writer) JSONOut { - return JSONOut { - structure: []JSONOutStructure{JSONOutRoot}, - writer: writer, - } -} - func ConcatData(first []Atom, second []Atom) []Atom { res := make([]Atom, 0, len(first) + len(second)) res = append(res, first...) |