Merge pull request 'objt-section' (#5) from objt-section into main

Reviewed-on: #5

parser/body.go

@@ -27,7 +27,16 @@ func (parser *ParsingOperation) parseBody () (err error) {
 				parser.tree.typeSections =
 					make(map[string] *TypeSection)
 			}
-			parser.tree.typeSections[section.root.name] = section
+			parser.tree.typeSections[section.name] = section
+			if err != nil { return }
+		case "objt":
+			var section *ObjtSection
+			section, err = parser.parseObjtSection()
+			if parser.tree.objtSections == nil {
+				parser.tree.objtSections =
+					make(map[string] *ObjtSection)
+			}
+			parser.tree.objtSections[section.name] = section
 			if err != nil { return }
 		case "face":
 		case "enum":

parser/objt.go

@@ -0,0 +1,119 @@
+package parser
+
+import "git.tebibyte.media/sashakoshka/arf/types"
+import "git.tebibyte.media/sashakoshka/arf/lexer"
+import "git.tebibyte.media/sashakoshka/arf/infoerr"
+
+// parseObjtSection parses an object type definition. This allows for structured
+// types to be defined, and for member variables to be added and overridden.
+func (parser *ParsingOperation) parseObjtSection () (
+	section *ObjtSection,
+	err     error,
+) {
+	err = parser.expect(lexer.TokenKindName)
+	if err != nil { return }
+	
+	section = &ObjtSection {
+		location: parser.token.Location(),
+		members:  make(map[string] ObjtMember),
+	}
+
+	// get permission
+	err = parser.nextToken(lexer.TokenKindPermission)
+	if err != nil { return }
+	section.permission = parser.token.Value().(types.Permission)
+
+	// get name
+	err = parser.nextToken(lexer.TokenKindName)
+	if err != nil { return }
+	section.name = parser.token.Value().(string)
+
+	// parse inherited type
+	err = parser.nextToken(lexer.TokenKindColon)
+	if err != nil { return }
+	err = parser.nextToken()
+	if err != nil { return }
+	section.inherits, err = parser.parseType()
+	if err != nil { return }
+	err = parser.expect(lexer.TokenKindNewline)
+	if err != nil { return }
+	err = parser.nextToken()
+	if err != nil { return }
+
+	// parse members
+	err = parser.parseObjtMembers(section)
+	if err != nil { return }
+	
+	if len(section.members) == 0 {
+		infoerr.NewError (
+			section.location,
+			"defining an object with no members",
+			infoerr.ErrorKindWarn).Print()
+	}
+	return
+}
+
+// parseObjtMembers parses a list of members for an object section. Indentation
+// level is assumed.
+func (parser *ParsingOperation) parseObjtMembers (
+	into *ObjtSection,
+) (
+	err     error,
+) {
+	for {
+		// if we've left the block, stop parsing
+		if !parser.token.Is(lexer.TokenKindIndent) { return }
+		if parser.token.Value().(int) != 1         { return }
+		
+		// add member to object section
+		var member ObjtMember
+		member, err = parser.parseObjtMember()
+		into.members[member.name] = member
+		if err != nil { return }
+	}
+}
+
+// parseObjtMember parses a single member of an object section. Indentation
+// level is assumed.
+func (parser *ParsingOperation) parseObjtMember () (
+	member ObjtMember,
+	err    error,
+) {
+	// get permission
+	err = parser.nextToken(lexer.TokenKindPermission)
+	if err != nil { return }
+	member.permission = parser.token.Value().(types.Permission)
+
+	// get name
+	err = parser.nextToken(lexer.TokenKindName)
+	if err != nil { return }
+	member.name = parser.token.Value().(string)
+
+	// get type
+	err = parser.nextToken(lexer.TokenKindColon)
+	if err != nil { return }
+	err = parser.nextToken()
+	if err != nil { return }
+	member.what, err = parser.parseType()
+	if err != nil { return }
+	
+	// parse default value
+	if parser.token.Is(lexer.TokenKindNewline) {
+		err = parser.nextToken()
+		if err != nil { return }
+
+		member.defaultValue,
+		err = parser.parseInitializationValues(1)
+		if err != nil { return }
+	} else {
+		member.defaultValue, err = parser.parseArgument()
+		if err != nil { return }
+
+		err = parser.expect(lexer.TokenKindNewline)
+		if err != nil { return }
+		err = parser.nextToken()
+		if err != nil { return }
+	}
+
+	return 
+}

parser/parser_test.go

@@ -1,6 +1,7 @@
 package parser
 
 import "io"
+import "strings"
 import "testing"
 // import "git.tebibyte.media/sashakoshka/arf/types"
 
@@ -10,9 +11,9 @@ func checkTree (modulePath string, correct string, test *testing.T) {
 	treeRunes  := []rune(treeString)
 	
 	test.Log("CORRECT TREE:")
-	test.Log(correct)
+	logWithLineNumbers(correct, test)
 	test.Log("WHAT WAS PARSED:")
-	test.Log(treeString)
+	logWithLineNumbers(treeString, test)
 	
 	if err != io.EOF && err != nil {
 		test.Log("returned error:")
@@ -63,6 +64,15 @@ func checkTree (modulePath string, correct string, test *testing.T) {
 	}
 }
 
+func logWithLineNumbers (bigString string, test *testing.T) {
+	lines := strings.Split (
+		strings.Replace(bigString, "\t", "        ", -1), "\n")
+
+	for index, line := range lines {
+		test.Logf("%3d | %s", index + 1, line)
+	}
+}
+
 func TestMeta (test *testing.T) {
 	checkTree ("../tests/parser/meta",
 `:arf
@@ -115,20 +125,6 @@ func TestType (test *testing.T) {
 ---
 type ro Basic:Int
 type ro BasicInit:Int 6
-type ro Complex:Obj
-	ro that:Basic
-	ro this:Basic
-type ro ComplexInit:Obj
-	ro that:BasicInit
-	ro this:Basic 23
-type ro ComplexWithComplexInit:Obj
-	ro basic:Basic 87
-	ro complex0:Complex
-		.that 98
-		.this 2
-	ro complex1:Complex
-		.that 98902
-		.this 235
 type ro IntArray:{Int ..}
 type ro IntArrayInit:{Int 3}
 	3298
@@ -137,3 +133,28 @@ type ro IntArrayInit:{Int 3}
 `, test)
 }
 
+func TestObjt (test *testing.T) {
+	checkTree ("../tests/parser/objt",
+`:arf
+---
+objt ro Basic:Obj
+	ro that:Basic
+	ro this:Basic
+objt ro ComplexInit:Obj
+	ro basic:Int 87
+	ro complex0:Bird
+		.that 98
+		.this 2
+	ro complex1:Bird
+		.that 98902
+		.this 235
+	ro whatever:{Int 3}
+		230984
+		849
+		394580
+objt ro Init:Obj
+	ro that:String "hello world"
+	ro this:Int 23
+`, test)
+}
+

parser/tree-tostring.go

@@ -51,6 +51,11 @@ func (tree *SyntaxTree) ToString (indent int) (output string) {
 		output += tree.typeSections[name].ToString(indent)
 	}
 
+	objtSectionKeys := sortMapKeysAlphabetically(tree.objtSections)
+	for _, name := range objtSectionKeys {
+		output += tree.objtSections[name].ToString(indent)
+	}
+
 	dataSectionKeys := sortMapKeysAlphabetically(tree.dataSections)
 	for _, name := range dataSectionKeys {
 		output += tree.dataSections[name].ToString(indent)
@@ -253,39 +258,64 @@ func (section *DataSection) ToString (indent int) (output string) {
 }
 
 func (section *TypeSection) ToString (indent int) (output string) {
-	output += section.root.ToString(indent, true)
-	return
-}
+	output += doIndent (
+		indent,
+		"type ",
+		section.permission.ToString(), " ",
+		section.name, ":",
+		section.inherits.ToString())
 
-func (node TypeNode) ToString (indent int, isRoot bool) (output string) {
-	output += doIndent(indent)
-	if isRoot {
-		output += "type "
-	}
-	
-	output += node.permission.ToString() + " "
-	output += node.name + ":"
-	output += node.what.ToString()
-	
 	isComplexInitialization :=
-		node.defaultValue.kind == ArgumentKindObjectInitializationValues ||
-		node.defaultValue.kind == ArgumentKindArrayInitializationValues
-	
-	if node.defaultValue.value == nil {
+		section.defaultValue.kind == ArgumentKindObjectInitializationValues ||
+		section.defaultValue.kind == ArgumentKindArrayInitializationValues
+
+	if section.defaultValue.value == nil {
 		output += "\n"
-		if len(node.children) > 0 {
-			for _, name := range sortMapKeysAlphabetically(node.children) {
-				child := node.children[name]
-				output += child.ToString(indent + 1, false)
-			}
-		}
 	} else if isComplexInitialization {
 		output += "\n"
-		output += node.defaultValue.ToString(indent + 1, true)
+		output += section.defaultValue.ToString(indent + 1, true)
 	} else {
-		output += " " + node.defaultValue.ToString(0, false)
-		output += "\n"	
+		output += " " + section.defaultValue.ToString(0, false)
+		output += "\n"
+	}
+	return
+}
+
+func (member ObjtMember) ToString (indent int) (output string) {
+	output += doIndent(indent)
+	
+	output += member.permission.ToString() + " "
+	output += member.name + ":"
+	output += member.what.ToString()
+	
+	isComplexInitialization :=
+		member.defaultValue.kind == ArgumentKindObjectInitializationValues ||
+		member.defaultValue.kind == ArgumentKindArrayInitializationValues
+	
+	if member.defaultValue.value == nil {
+		output += "\n"
+	} else if isComplexInitialization {
+		output += "\n"
+		output += member.defaultValue.ToString(indent + 1, true)
+	} else {
+		output += " " + member.defaultValue.ToString(0, false)
+		output += "\n"
 	}
 
 	return
 }
+
+func (section *ObjtSection) ToString (indent int) (output string) {
+	output += doIndent (
+		indent,
+		"objt ",
+		section.permission.ToString(), " ",
+		section.name, ":",
+		section.inherits.ToString(), "\n")
+
+	for _, name := range sortMapKeysAlphabetically(section.members) {
+		output += section.members[name].ToString(indent + 1)
+	}
+	return
+}
+

parser/tree.go

@@ -12,6 +12,7 @@ type SyntaxTree struct {
 
 	requires     []string
 	typeSections map[string] *TypeSection
+	objtSections map[string] *ObjtSection
 	dataSections map[string] *DataSection
 }
 
@@ -161,19 +162,32 @@ type DataSection struct {
 	value      Argument
 }
 
-// TypeNode represents a part of a type.  
-type TypeNode struct {
+// TypeSection represents a blind type definition.
+type TypeSection struct {
+	location file.Location
+	name     string
+	
+	inherits     Type
+	permission   types.Permission
+	defaultValue Argument
+}
+
+// ObjtMember represents a part of an object type definition.
+type ObjtMember struct {
 	location file.Location
 	name     string
 	
 	what         Type
 	permission   types.Permission
 	defaultValue Argument
-	children     map[string] TypeNode
 }
 
-// TypeSection represents a type definition.
-type TypeSection struct {
+// ObjtSection represents an object type definition
+type ObjtSection struct {
 	location file.Location
-	root     TypeNode
+	name     string
+	
+	inherits     Type
+	permission   types.Permission
+	members      map[string] ObjtMember
 }

parser/type.go

@@ -2,9 +2,10 @@ package parser
 
 import "git.tebibyte.media/sashakoshka/arf/types"
 import "git.tebibyte.media/sashakoshka/arf/lexer"
-import "git.tebibyte.media/sashakoshka/arf/infoerr"
+// import "git.tebibyte.media/sashakoshka/arf/infoerr"
 
-// parseTypeSection parses a type definition.
+// parseTypeSection parses a blind type definition, meaning it can inherit from
+// anything including primitives, but cannot define structure.
 func (parser *ParsingOperation) parseTypeSection () (
 	section *TypeSection,
 	err     error,
@@ -14,50 +15,33 @@ func (parser *ParsingOperation) parseTypeSection () (
 	
 	section = &TypeSection { location: parser.token.Location() }
 
-	// parse root node
-	err = parser.nextToken()
-	if err != nil { return }
-	section.root, err = parser.parseTypeNode(0)
-
-	return
-}
-
-// parseTypeNode parses a single type definition node recursively.
-func (parser *ParsingOperation) parseTypeNode (
-	baseIndent int,
-) (
-	node TypeNode,
-	err  error,
-) {
-	node.children = make(map[string] TypeNode)
-
 	// get permission
-	err = parser.expect(lexer.TokenKindPermission)
+	err = parser.nextToken(lexer.TokenKindPermission)
 	if err != nil { return }
-	node.permission = parser.token.Value().(types.Permission)
+	section.permission = parser.token.Value().(types.Permission)
 
 	// get name
 	err = parser.nextToken(lexer.TokenKindName)
 	if err != nil { return }
-	node.name = parser.token.Value().(string)
+	section.name = parser.token.Value().(string)
 
-	// get inherited type
+	// parse inherited type
 	err = parser.nextToken(lexer.TokenKindColon)
 	if err != nil { return }
 	err = parser.nextToken()
 	if err != nil { return }
-	node.what, err = parser.parseType()
+	section.inherits, err = parser.parseType()
 	if err != nil { return }
 
-	// get value, or child nodes
+	// parse default values
 	if parser.token.Is(lexer.TokenKindNewline) {
 		err = parser.nextToken()
 		if err != nil { return }
 
-		err = parser.parseTypeNodeBlock(baseIndent, &node)
+		section.defaultValue, err = parser.parseInitializationValues(0)
 		if err != nil { return }
 	} else {
-		node.defaultValue, err = parser.parseArgument()
+		section.defaultValue, err = parser.parseArgument()
 		if err != nil { return }
 
 		err = parser.expect(lexer.TokenKindNewline)
@@ -67,101 +51,3 @@ func (parser *ParsingOperation) parseTypeNode (
 	}
 	return
 }
-
-// parseTypeNodeBlock starts on the line after a type node, and parses what
-// could be either an array initialization, an object initialization, or more
-// child nodes. It is similar to parseInitializationValues. If none of these
-// things were found the parser stays at the beginning of the line and the
-// method returns.
-func (parser *ParsingOperation) parseTypeNodeBlock (
-	baseIndent int,
-	parent     *TypeNode,
-) (
-	err error,
-) {
-	// check if line is indented one more than baseIndent
-	if !parser.token.Is(lexer.TokenKindIndent) { return }
-	if parser.token.Value().(int) != baseIndent + 1 { return }
-
-	thingLocation := parser.token.Location()
-	
-	err = parser.nextToken()
-	if err != nil { return }
-
-	if parser.token.Is(lexer.TokenKindDot) {
-
-		// object initialization
-		parser.previousToken()
-		initializationArgument := Argument { location: thingLocation }
-		var initializationValues ObjectInitializationValues
-		initializationValues, err    = parser.parseObjectInitializationValues()
-		initializationArgument.kind  = ArgumentKindObjectInitializationValues
-		initializationArgument.value = &initializationValues
-		parent.defaultValue = initializationArgument
-		
-	} else if parser.token.Is(lexer.TokenKindPermission) {
-
-		// child members
-		parser.previousToken()
-		err = parser.parseTypeNodeChildren(parent)
-		
-	} else {
-	
-		// array initialization
-		parser.previousToken()
-		initializationArgument := Argument { location: thingLocation }
-		var initializationValues ArrayInitializationValues
-		initializationValues, err    = parser.parseArrayInitializationValues()
-		initializationArgument.kind  = ArgumentKindArrayInitializationValues
-		initializationArgument.value = &initializationValues
-		parent.defaultValue = initializationArgument
-	}
-	
-	return
-}
-
-// parseTypeNodeChildren parses child type nodes into a parent type node.
-func (parser *ParsingOperation) parseTypeNodeChildren (
-	parent *TypeNode,
-) (
-	err error,
-) {
-	baseIndent := 0
-	begin      := true
-	
-	for {
-		// if there is no indent we can just stop parsing
-		if !parser.token.Is(lexer.TokenKindIndent) { break }
-		indent := parser.token.Value().(int)
-		
-		if begin == true {
-			baseIndent = indent 
-			begin      = false
-		}
-
-		// do not parse any further if the indent has changed
-		if indent != baseIndent { break }
-
-		// move on to the beginning of the line, which must contain
-		// a type node
-		err = parser.nextToken()
-		if err != nil { return }
-		var child TypeNode
-		child, err = parser.parseTypeNode(baseIndent)
-
-		// if the member has already been listed, throw an error
-		_, exists := parent.children[child.name]
-		if exists {
-			err = parser.token.NewError (
-				"duplicate member \"" + child.name +
-				"\" in object member initialization",
-				infoerr.ErrorKindError)
-			return
-		}
-
-		// store in parent
-		parent.children[child.name] = child
-	}
-	
-	return
-}

tests/parser/objt/main.arf

@@ -0,0 +1,21 @@
+:arf
+---
+objt ro Basic:Obj
+	ro that:Basic
+	ro this:Basic
+
+objt ro Init:Obj
+	ro that:String "hello world"
+	ro this:Int 23
+
+objt ro ComplexInit:Obj
+	ro whatever:{Int 3}
+		230984
+		849 394580
+	ro complex0:Bird
+		.that 98
+		.this 2
+	ro complex1:Bird
+		.that 98902
+		.this 235
+	ro basic:Int 87

tests/parser/type/main.arf

@@ -8,20 +8,3 @@ type ro IntArray:{Int ..}
 
 type ro IntArrayInit:{Int 3}
 	3298 923 92
-
-type ro Complex:Obj
-	ro that:Basic
-	ro this:Basic
-
-type ro ComplexInit:Obj
-	ro that:BasicInit
-	ro this:Basic 23
-
-type ro ComplexWithComplexInit:Obj
-	ro complex0:Complex
-		.that 98
-		.this 2
-	ro complex1:Complex
-		.that 98902
-		.this 235
-	ro basic:Basic 87