Renames walk.Datum to walk.Atom

1 files changed, 34 insertions, 32 deletions

diff --git a/subex/main.go b/subex/main.go
index 138de9a..fd59047 100644
--- a/subex/main.go
+++ b/subex/main.go
@@ -8,31 +8,33 @@ import (
 	"strings"
 )
 
-// A part of an insertion, either a datum or a slot from which to load
+// A part of an insertion, either an Atom or a slot from which to load
 // TODO rename this
 type TransducerOutput interface {
-	// Given the current store, return the []Datum produced by the TransducerOutput
-	build(Store) []walk.Datum
+	// Given the current store, return the []Atom produced by the TransducerOutput
+	build(Store) []walk.Atom
 }
 
-// A TransducerOutput which is just a datum literal
-type TransducerReplacementRune struct {
-	datum walk.Datum
+// A TransducerOutput which is just an Atom literal
+type TransducerReplacementAtom struct {
+	atom walk.Atom
 }
-func (replacement TransducerReplacementRune) build(store Store) []walk.Datum {
-	return []walk.Datum{replacement.datum}
+func (replacement TransducerReplacementAtom) build(store Store) []walk.Atom {
+	return []walk.Atom{replacement.atom}
 }
 
+// TODO should be a single field called slot with a type of rune
 // A TransducerOutput which is a slot that is loaded from
 type TransducerReplacementLoad struct {
-	datum walk.Datum
+	atom walk.Atom
 }
-func (replacement TransducerReplacementLoad) build(store Store) []walk.Datum {
-	return store[replacement.datum]
+func (replacement TransducerReplacementLoad) build(store Store) []walk.Atom {
+	return store[replacement.atom]
 }
 
 // Where slots are stored
-type Store map[walk.Datum][]walk.Datum
+// TODO should map from runes as only runes can be slots
+type Store map[walk.Atom][]walk.Atom
 // Return a new store with all the data from this one
 func (store Store) clone() Store {
 	newStore := make(Store)
@@ -42,7 +44,7 @@ func (store Store) clone() Store {
 	return newStore
 }
 // Return a copy of this store but with an additional slot set
-func (store Store) withValue(key walk.Datum, value []walk.Datum) Store {
+func (store Store) withValue(key walk.Atom, value []walk.Atom) Store {
 	newStore := store.clone()
 	newStore[key] = value
 	return newStore
@@ -60,17 +62,17 @@ type SubexBranch struct {
 	// State in this branch
 	state SubexState
 	// Output so far in this branch
-	output []walk.Datum
+	output []walk.Atom
 }
 // Read a single character and return all the branches resulting from this branch consuming it
-func (pair SubexBranch) eat(char walk.Datum) []SubexBranch {
+func (pair SubexBranch) eat(char walk.Atom) []SubexBranch {
 	states := pair.state.eat(pair.store, char)
 	for i := range states {
 		states[i].output = walk.ConcatData(pair.output, states[i].output)
 	}
 	return states
 }
-func (pair SubexBranch) accepting() [][]walk.Datum {
+func (pair SubexBranch) accepting() [][]walk.Atom {
 	return pair.state.accepting(pair.store)
 }
 
@@ -94,7 +96,7 @@ func pruneStates(states []SubexBranch) (newStates []SubexBranch) {
 }
 
 // Run the subex transducer
-func RunTransducer(transducer SubexState, input <-chan walk.Datum) (output []walk.Datum, err bool) {
+func RunTransducer(transducer SubexState, input <-chan walk.Atom) (output []walk.Atom, err bool) {
 	states := []SubexBranch{{
 		state: transducer,
 		output: nil,
@@ -129,8 +131,8 @@ func Main() {
 	program := os.Args[1]
 	ast := Parse(program)
 	transducer := CompileTransducer(ast)
-	pieces := make(chan walk.Datum)
-	go func(out chan<- walk.Datum, input []walk.WalkValue) {
+	pieces := make(chan walk.Atom)
+	go func(out chan<- walk.Atom, input []walk.WalkValue) {
 		for _, value := range input {
 			value.Pieces(out)
 		}
@@ -138,21 +140,21 @@ func Main() {
 	}(pieces, tokens)
 	output, err := RunTransducer(transducer, pieces)
 	if !err {
-		dataIn := make(chan walk.Datum)
-		go func(out chan<- walk.Datum, in []walk.Datum) {
-			for _, datum := range in {
-				out<-datum
+		dataIn := make(chan walk.Atom)
+		go func(out chan<- walk.Atom, in []walk.Atom) {
+			for _, atom := range in {
+				out<-atom
 			}
 			close(out)
 		}(dataIn, output)
 		valueOut := make(chan walk.WalkValue)
-		go func(out chan<- walk.WalkValue, in <-chan walk.Datum) {
+		go func(out chan<- walk.WalkValue, in <-chan walk.Atom) {
 			for {
-				datum, hasDatum := <-in
-				if !hasDatum {
+				atom, hasAtom := <-in
+				if !hasAtom {
 					break
 				}
-				switch v := datum.(type) {
+				switch v := atom.(type) {
 					case walk.TerminalValue:
 						out<-v
 						continue
@@ -171,22 +173,22 @@ func Main() {
 						panic("Error! subex output an EndString before BeginString")
 					case walk.StartString:
 					default:
-						panic("Unknown datum type")
+						panic("Unknown atom type")
 				}
 				// Handle string start
 				var builder strings.Builder
 				loop: for {
-					datum, hasDatum := <-in
-					if !hasDatum {
+					atom, hasAtom := <-in
+					if !hasAtom {
 						panic("Missing EndString")
 					}
-					switch v := datum.(type) {
+					switch v := atom.(type) {
 						case walk.EndString:
 							break loop
 						case rune:
 							builder.WriteRune(v)
 						default:
-							panic("Invalid datum in string")
+							panic("Invalid atom in string")
 					}
 				}
 				out<-walk.ValueString(builder.String())