Added a locatable node trait

analyzer/analyzer.go

@@ -3,7 +3,6 @@ package analyzer
 import "os"
 import "fmt"
 import "path/filepath"
-import "git.tebibyte.media/arf/arf/file"
 import "git.tebibyte.media/arf/arf/parser"
 import "git.tebibyte.media/arf/arf/infoerr"
 
@@ -217,15 +216,13 @@ func (analyzer *AnalysisOperation) addSection (section Section) {
 // destination. If it can, it retunrs nil. If it can't, it returns an error
 // explaining why.
 func (analyzer *AnalysisOperation) typeCheck (
-	location file.Location,
 	source Argument,
 	destination Type,
 ) (
 	err error,
 ) {
 	if !source.canBePassedAs(destination) {
-		err = infoerr.NewError (
-			location,
+		err = source.NewError (
 			typeMismatchErrorMessage (
 				source.What(),
 				destination),

analyzer/argument.go

@@ -1,7 +1,8 @@
 package analyzer
 
+import "git.tebibyte.media/arf/arf/file"
 import "git.tebibyte.media/arf/arf/parser"
-// import "git.tebibyte.media/arf/arf/infoerr"
+import "git.tebibyte.media/arf/arf/infoerr"
 
 // Argument represents a value that can be placed anywhere a value goes. This
 // allows things like phrases being arguments to other phrases.
@@ -16,6 +17,8 @@ type Argument interface {
 	// StringLiteral
 
 	What     () (what Type)
+	Location () (location file.Location)
+	NewError (message string, kind infoerr.ErrorKind) (err error)
 	ToString (indent int) (output string)
 	canBePassedAs (what Type) (allowed bool)
 }
@@ -76,16 +79,36 @@ func (analyzer AnalysisOperation) analyzeArgument (
 		// TODO
 		
 	case parser.ArgumentKindInt:
-		outputArgument = IntLiteral(inputArgument.Value().(int64))
+		outputArgument = IntLiteral {
+			value: inputArgument.Value().(int64),
+			locatable: locatable {
+				location: inputArgument.Location(),
+			},
+		}
 		
 	case parser.ArgumentKindUInt:
-		outputArgument = UIntLiteral(inputArgument.Value().(uint64))
+		outputArgument = UIntLiteral {
+			value: inputArgument.Value().(uint64),
+			locatable: locatable {
+				location: inputArgument.Location(),
+			},
+		}
 		
 	case parser.ArgumentKindFloat:
-		outputArgument = FloatLiteral(inputArgument.Value().(float64))
+		outputArgument = FloatLiteral {
+			value: inputArgument.Value().(float64),
+			locatable: locatable {
+				location: inputArgument.Location(),
+			},
+		}
 		
 	case parser.ArgumentKindString:
-		outputArgument = StringLiteral(inputArgument.Value().(string))
+		outputArgument = StringLiteral {
+			value: inputArgument.Value().(string),
+			locatable: locatable {
+				location: inputArgument.Location(),
+			},
+		}
 	}
 	return
 }

analyzer/literals.go

@@ -2,15 +2,34 @@ package analyzer
 
 import "fmt"
 
-type IntLiteral    int64
-type UIntLiteral   uint64
-type FloatLiteral  float64
-type StringLiteral string
-type RuneLiteral   rune
+type IntLiteral struct {
+	locatable
+	value int64
+}
+
+type UIntLiteral struct {
+	locatable
+	value uint64
+}
+
+type FloatLiteral struct {
+	locatable
+	value float64
+}
+
+type StringLiteral struct {
+	locatable
+	value string
+}
+
+type RuneLiteral struct {
+	locatable
+	value rune
+}
 
 // ToString outputs the data in the argument as a string.
 func (literal IntLiteral) ToString (indent int) (output string) {
-	output += doIndent(indent, fmt.Sprint("arg int ", literal, "\n"))
+	output += doIndent(indent, fmt.Sprint("arg int ", literal.value, "\n"))
 	return
 }
 
@@ -46,7 +65,7 @@ func (literal IntLiteral) canBePassedAs (what Type) (allowed bool) {
 
 // ToString outputs the data in the argument as a string.
 func (literal UIntLiteral) ToString (indent int) (output string) {
-	output += doIndent(indent, fmt.Sprint("arg uint ", literal, "\n"))
+	output += doIndent(indent, fmt.Sprint("arg uint ", literal.value, "\n"))
 	return
 }
 
@@ -94,7 +113,7 @@ func (literal FloatLiteral) What () (what Type) {
 
 // ToString outputs the data in the argument as a string.
 func (literal FloatLiteral) ToString (indent int) (output string) {
-	output += doIndent(indent, fmt.Sprint("arg float ", literal, "\n"))
+	output += doIndent(indent, fmt.Sprint("arg float ", literal.value, "\n"))
 	return
 }
 
@@ -125,7 +144,7 @@ func (literal StringLiteral) What () (what Type) {
 
 // ToString outputs the data in the argument as a string.
 func (literal StringLiteral) ToString (indent int) (output string) {
-	output += doIndent(indent, fmt.Sprint("arg string \"", literal, "\"\n"))
+	output += doIndent(indent, fmt.Sprint("arg string '", literal.value, "'\n"))
 	return
 }
 
@@ -170,7 +189,7 @@ func (literal StringLiteral) canBePassedAs (what Type) (allowed bool) {
 
 // ToString outputs the data in the argument as a string.
 func (literal RuneLiteral) ToString (indent int) (output string) {
-	output += doIndent(indent, fmt.Sprint("arg rune '", literal, "'\n"))
+	output += doIndent(indent, fmt.Sprint("arg rune '", literal.value, "'\n"))
 	return
 }
 

analyzer/node-traits.go

@@ -1,13 +1,38 @@
 package analyzer
 
 import "path/filepath"
+import "git.tebibyte.media/arf/arf/file"
 import "git.tebibyte.media/arf/arf/types"
+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 (node locatable) Location () (location file.Location) {
+	location = node.location
+	return
+}
+
+// NewError creates a new error at the node's location.
+func (node locatable) NewError (
+	message string,
+	kind    infoerr.ErrorKind,
+) (
+	err error,
+) {
+	err = infoerr.NewError(node.location, message, kind)
+	return
+}
 
 // sectionBase is a struct that all sections must embed.
 type sectionBase struct {
 	where      locator
 	complete   bool
 	permission types.Permission
+	locatable
 }
 
 // Name returns the name of the section.

analyzer/table.go

@@ -3,7 +3,9 @@ package analyzer
 import "os"
 import "sort"
 import "path/filepath"
+import "git.tebibyte.media/arf/arf/file"
 import "git.tebibyte.media/arf/arf/types"
+import "git.tebibyte.media/arf/arf/infoerr"
 
 // locator uniquely identifies a section in the section table.
 type locator struct {
@@ -79,6 +81,8 @@ type Section interface {
 	ModulePath () (path string)
 	ModuleName () (path string)
 	Permission () (permission types.Permission)
+	Location   () (location file.Location)
+	NewError   (message string, kind infoerr.ErrorKind) (err error)
 	locator    () (where locator)
 
 	// Must be implemented by each individual section

analyzer/type-section.go

@@ -64,6 +64,8 @@ func (analyzer AnalysisOperation) analyzeTypeSection () (
 	analyzer.addSection(section)
 
 	inputSection := analyzer.currentSection.(parser.TypeSection)
+	outputSection.location = analyzer.currentSection.Location()
+	
 	if inputSection.Permission() == types.PermissionReadWrite {
 		err = inputSection.NewError (
 			"read-write (rw) permission not understood in this " +
@@ -83,7 +85,6 @@ func (analyzer AnalysisOperation) analyzeTypeSection () (
 
 		// type check default value
 		err = analyzer.typeCheck (
-			inputSection.Argument().Location(),
 			outputSection.argument,
 			outputSection.what)
 		if err != nil { return }

analyzer/type.go

@@ -21,6 +21,8 @@ const (
 // Type represents a description of a type. It must eventually point to a
 // TypeSection.
 type Type struct {
+	locatable
+
 	// one of these must be nil.
 	actual *TypeSection
 	points *Type
@@ -170,6 +172,7 @@ func (analyzer AnalysisOperation) analyzeType (
 ) {
 	outputType.mutable  = inputType.Mutable()
 	outputType.length   = inputType.Length()
+	outputType.location = inputType.Location()
 	if outputType.length < 1 {
 		err = inputType.NewError (
 			"cannot specify a length of zero",