Location is now included in structs via composition

parser/argument.go

@@ -16,7 +16,7 @@ var validArgumentStartTokens = []lexer.TokenKind {
 }
 
 func (parser *ParsingOperation) parseArgument () (argument Argument, err error) {
-	argument.location = parser.token.Location()
+	argument.setLocation(parser.token.Location())
 
 	err = parser.expect(validArgumentStartTokens...)
 	if err != nil { return }
@@ -44,7 +44,6 @@ func (parser *ParsingOperation) parseArgument () (argument Argument, err error)
 
 			argument.kind  = ArgumentKindDeclaration
 			argument.value = Declaration {
-				location: argument.location,
 				name: identifier.trail[0],
 				what: what,
 			}

parser/data.go

@@ -11,7 +11,8 @@ func (parser *ParsingOperation) parseDataSection () (
 	err = parser.expect(lexer.TokenKindName)
 	if err != nil { return }
 	
-	section = &DataSection { location: parser.token.Location() }
+	section = &DataSection { }
+	section.setLocation(parser.token.Location())
 
 	err = parser.nextToken(lexer.TokenKindPermission)
 	if err != nil { return }

parser/enum.go

@@ -11,7 +11,8 @@ func (parser *ParsingOperation) parseEnumSection () (
 	err = parser.expect(lexer.TokenKindName)
 	if err != nil { return }
 	
-	section = &EnumSection { location: parser.token.Location() }
+	section = &EnumSection { }
+	section.setLocation(parser.token.Location())
 
 	// get permission
 	err = parser.nextToken(lexer.TokenKindPermission)

parser/face.go

@@ -13,9 +13,9 @@ func (parser *ParsingOperation) parseFaceSection () (
 	if err != nil { return }
 	
 	section = &FaceSection {
-		location: parser.token.Location(),
 		behaviors:  make(map[string] FaceBehavior),
 	}
+	section.setLocation(parser.token.Location())
 
 	// get permission
 	err = parser.nextToken(lexer.TokenKindPermission)

parser/func.go

@@ -12,7 +12,8 @@ func (parser *ParsingOperation) parseFuncSection () (
 	err = parser.expect(lexer.TokenKindName)
 	if err != nil { return }
 	
-	section = &FuncSection { location: parser.token.Location() }
+	section = &FuncSection { }
+	section.setLocation(parser.token.Location())
 
 	// get permission
 	err = parser.nextToken(lexer.TokenKindPermission)

parser/node-traits.go

@@ -0,0 +1,30 @@
+package parser
+
+import "git.tebibyte.media/arf/arf/file"
+import "git.tebibyte.media/arf/arf/infoerr"
+
+// locatable allows a tree node to have a location.
+type locatable struct {
+	location file.Location
+}
+
+// Location returns the location of the node.
+func (trait locatable) Location (location file.Location) {
+	location = trait.location
+	return
+}
+
+// setLocation sets the location of the node.
+func (trait locatable) setLocation (location file.Location) {
+	trait.location = location
+}
+
+// NewError creates a new error at the node's location.
+func (trait locatable) NewError (
+	message string,
+	kind    infoerr.ErrorKind,
+) (
+	err infoerr.Error,
+) {
+	return infoerr.NewError(trait.location, message, kind)
+}

parser/objt.go

@@ -13,7 +13,8 @@ func (parser *ParsingOperation) parseObjtSection () (
 	err = parser.expect(lexer.TokenKindName)
 	if err != nil { return }
 	
-	section = &ObjtSection { location: parser.token.Location() }
+	section = &ObjtSection { }
+	section.setLocation(parser.token.Location())
 
 	// get permission
 	err = parser.nextToken(lexer.TokenKindPermission)

parser/tree.go

@@ -21,7 +21,7 @@ type SyntaxTree struct {
 
 // Identifier represents a chain of arguments separated by a dot.
 type Identifier struct {
-	location file.Location
+	locatable
 	trail []string
 }
 
@@ -42,7 +42,7 @@ const (
 
 // Type represents a type specifier
 type Type struct {
-	location file.Location
+	locatable
 
 	mutable bool
 	kind TypeKind
@@ -60,7 +60,7 @@ type Type struct {
 
 // Declaration represents a variable declaration.
 type Declaration struct {
-	location file.Location
+	locatable
 	name string
 	what Type
 }
@@ -68,14 +68,14 @@ type Declaration struct {
 // ObjectInitializationValues represents a list of object member initialization
 // attributes.
 type ObjectInitializationValues struct {
-	location   file.Location
+	locatable
 	attributes map[string] Argument
 }
 
 // ArrayInitializationValues represents a list of attributes initializing an
 // array.
 type ArrayInitializationValues struct {
-	location file.Location
+	locatable
 	values []Argument
 }
 
@@ -139,7 +139,7 @@ const (
 // Argument represents a value that can be placed anywhere a value goes. This
 // allows things like phrases being arguments to other phrases.
 type Argument struct {
-	location file.Location
+	locatable
 	kind  ArgumentKind
 	value any
 	// TODO: if there is an argument expansion operator its existence should
@@ -148,7 +148,7 @@ type Argument struct {
 
 // DataSection represents a global variable.
 type DataSection struct {
-	location file.Location
+	locatable
 	name string
 	
 	what       Type
@@ -158,7 +158,7 @@ type DataSection struct {
 
 // TypeSection represents a blind type definition.
 type TypeSection struct {
-	location file.Location
+	locatable
 	name string
 	
 	inherits     Type
@@ -168,7 +168,7 @@ type TypeSection struct {
 
 // ObjtMember represents a part of an object type definition.
 type ObjtMember struct {
-	location file.Location
+	locatable
 	name string
 
 	what         Type
@@ -179,7 +179,7 @@ type ObjtMember struct {
 
 // ObjtSection represents an object type definition.
 type ObjtSection struct {
-	location file.Location
+	locatable
 	name string
 
 	inherits     Identifier
@@ -189,14 +189,14 @@ type ObjtSection struct {
 
 // EnumMember represents a member of an enum section.
 type EnumMember struct {
-	location file.Location
+	locatable
 	name  string
 	value Argument
 }
 
 // EnumSection represents an enumerated type section.
 type EnumSection struct {
-	location file.Location
+	locatable
 	name string
 	
 	what       Type
@@ -206,7 +206,7 @@ type EnumSection struct {
 
 // FaceBehavior represents a behavior of an interface section.
 type FaceBehavior struct {
-	location file.Location
+	locatable
 	name string
 
 	inputs  []Declaration
@@ -215,7 +215,7 @@ type FaceBehavior struct {
 
 // FaceSection represents an interface type section.
 type FaceSection struct {
-	location file.Location
+	locatable
 	name     string
 	inherits Identifier
 	
@@ -268,7 +268,7 @@ type FuncOutput struct {
 
 // FuncSection represents a function section.
 type FuncSection struct {
-	location   file.Location
+	locatable
 	name       string
 	permission types.Permission
 	

parser/type.go

@@ -13,7 +13,8 @@ func (parser *ParsingOperation) parseTypeSection () (
 	err = parser.expect(lexer.TokenKindName)
 	if err != nil { return }
 	
-	section = &TypeSection { location: parser.token.Location() }
+	section = &TypeSection { }
+	section.setLocation(parser.token.Location())
 
 	// get permission
 	err = parser.nextToken(lexer.TokenKindPermission)