Merge pull request 'type-section-rework' (#6) from type-section-rework into main

Reviewed-on: arf/arf#6

examples/basic/main.arf

@@ -4,6 +4,6 @@ require "io"
 
 func ro main
 	> arguments:{String ..}
-	< status:Int 0
+	< status:Int:<0>
 	---
 	io.println "hello world"

examples/full/main.arf

@@ -5,18 +5,18 @@ require "io"
 ---
 
 # this is a global variable
-data pv helloText:String "Hello, world!"
+data pv helloText:String:<"Hello, world!">
 
 # this is a struct definition
-objt ro Greeter:Obj
+type ro Greeter:Obj:(
-	rw text:String "Hi."
+	.rw text:String:<"Hi.">)
 
 # this is a function
 func ro main
 	> arguments:{String ..}
-	< status:Int 0
+	< status:Int:<0>
 	---
-	= greeter:Greeter:mut
+	let greeter:Greeter:mut
 	greeter.setText helloText
 	greeter.greet
 

lexer/lexer.go

@@ -192,6 +192,16 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
 		token.kind = TokenKindComma
 		lexer.addToken(token)
 		err = lexer.nextRune()
+	case '(':
+		token := lexer.newToken()
+		token.kind = TokenKindLParen
+		lexer.addToken(token)
+		err = lexer.nextRune()
+	case ')':
+		token := lexer.newToken()
+		token.kind = TokenKindRParen
+		lexer.addToken(token)
+		err = lexer.nextRune()
 	case '[':
 		token := lexer.newToken()
 		token.kind = TokenKindLBracket

lexer/lexer_test.go

@@ -138,6 +138,8 @@ func TestTokenizeAll (test *testing.T) {
 		quickToken(1, TokenKindDot, nil),
 		quickToken(1, TokenKindComma, nil),
 		quickToken(2, TokenKindElipsis, nil),
+		quickToken(1, TokenKindLParen, nil),
+		quickToken(1, TokenKindRParen, nil),
 		quickToken(1, TokenKindLBracket, nil),
 		quickToken(1, TokenKindRBracket, nil),
 		quickToken(1, TokenKindLBrace, nil),

lexer/token.go

@@ -28,6 +28,8 @@ const (
         TokenKindElipsis
         TokenKindComma
         
+        TokenKindLParen
+        TokenKindRParen
         TokenKindLBracket
         TokenKindRBracket
         TokenKindLBrace
@@ -166,6 +168,10 @@ func (tokenKind TokenKind) Describe () (description string) {
 		description = "Elipsis"
 	case TokenKindComma:
 		description = "Comma"
+	case TokenKindLParen:
+		description = "LParen"
+	case TokenKindRParen:
+		description = "RParen"
 	case TokenKindLBracket:
 		description = "LBracket"
 	case TokenKindRBracket:

parser/accessors.go

@@ -29,12 +29,6 @@ func (section TypeSection) Kind () (kind SectionKind) {
 	return
 }
 
-// Kind returns the section's kind (SectionKindObjt).
-func (section ObjtSection) Kind () (kind SectionKind) {
-	kind = SectionKindObjt
-	return
-}
-
 // Kind returns the section's kind (SectionKindEnum).
 func (section EnumSection) Kind () (kind SectionKind) {
 	kind = SectionKindEnum
@@ -111,23 +105,23 @@ func (what Type) Points () (points Type) {
 	return
 }
 
-// Values returns an iterator for the initialization values.
+// MembersLength returns the amount of new members the type specifier defines.
-func (values ObjectInitializationValues) Sections () (
+// If it defines no new members, it returns zero.
-	iterator types.Iterator[Argument],
+func (what Type) MembersLength () (length int) {
-) {
+	length = len(what.members)
-	iterator = types.NewIterator(values.attributes)
 	return
 }
 
-// Length returns the amount of values.
+// Member returns the member at index.
-func (values ArrayInitializationValues) Length () (length int) {
+func (what Type) Member (index int) (member TypeMember) {
-	length = len(values.values)
+	member = what.members[index]
 	return
 }
 
-// Item returns the value at index.
+// BitWidth returns the bit width of the type member. If it is zero, it should
-func (values ArrayInitializationValues) Value (index int) (value Argument) {
+// be treated as unspecified.
-	value = values.values[index]
+func (member TypeMember) BitWidth () (width uint64) {
+	width = member.bitWidth
 	return
 }