feat: cleaner parsing functions

pkg/saccharine/token/token.go

@@ -1,5 +1,7 @@
 package token
 
+import "fmt"
+
 // All tokens in the pseudo-lambda language.
 type Type int
 
@@ -8,12 +10,12 @@ const (
 	CloseParen             // Denotes the ')' token.
 	OpenBrace              // Denotes the '{' token.
 	CloseBrace             // Denotes the '}' token.
-	End                    // Denotes the ';' token.
+	HardBreak              // Denotes the ';' token.
 	Assign                 // Denotes the ':=' token.
 	Atom                   // Denotes an alpha-numeric variable.
 	Slash                  // Denotes the '/' token.
 	Dot                    // Denotes the '.' token.
-	Newline                // Denotes a new-line.
+	SoftBreak              // Denotes a new-line.
 )
 
 // A representation of a token in source code.
@@ -43,8 +45,8 @@ func NewDot(column int) *Token {
 	return &Token{Type: Dot, Column: column, Value: "."}
 }
 
-func NewEnd(column int) *Token {
-	return &Token{Type: End, Column: column, Value: ";"}
+func NewHardBreak(column int) *Token {
+	return &Token{Type: HardBreak, Column: column, Value: ";"}
 }
 
 func NewAssign(column int) *Token {
@@ -59,8 +61,8 @@ func NewAtom(name string, column int) *Token {
 	return &Token{Type: Atom, Column: column, Value: name}
 }
 
-func NewNewline(column int) *Token {
-	return &Token{Type: Newline, Column: column, Value: "\\n"}
+func NewSoftBreak(column int) *Token {
+	return &Token{Type: SoftBreak, Column: column, Value: "\\n"}
 }
 
 func Name(typ Type) string {
@@ -75,10 +77,12 @@ func Name(typ Type) string {
 		return "."
 	case Atom:
 		return "ATOM"
-	case Newline:
+	case SoftBreak:
 		return "\\n"
+	case HardBreak:
+		return ";"
 	default:
-		return "?"
+		panic(fmt.Errorf("unknown token type %v", typ))
 	}
 }