Add access specifiers and link names to parser

entity/toplevel.go

@@ -8,11 +8,36 @@ type TopLevel interface {
 	topLevel ()
 }
 
+// Access determines the external access rule for a top-level entity.
+type Access int; const (
+	AccessPrivate = iota
+	AccessRestricted
+	AccessPublic
+)
+
+func (this *Access) String () string {
+	switch *this {
+	case AccessPrivate:    return "-"
+	case AccessRestricted: return "#"
+	case AccessPublic:     return "+"
+	default: return fmt.Sprintf("entity.Access(%d)", this)
+	}
+}
+
+func (this *Access) Capture (values []string) error {
+	switch values[0] {
+	case "-": *this = AccessPrivate
+	case "#": *this = AccessRestricted
+	case "+": *this = AccessPublic
+	}
+	return nil
+}
+
 // Typedef binds a type to a global identifier.
 type Typedef struct {
 	// Syntax
 	Pos lexer.Position
-	Public bool   `parser:" @'+'?      "`
+	Acc    *Access `parser:" @('-' | '#' | '+')? "`
 	Name   string  `parser:" @TypeIdent          "`
 	Type   Type    `parser:" ':' @@              "`
 
@@ -21,13 +46,17 @@ type Typedef struct {
 }
 func (*Typedef) topLevel(){}
 func (this *Typedef) String () string {
-	out := fmt.Sprint(this.Name, ": ", this.Type)
+	output := ""
+	if this.Acc != nil {
+		output += fmt.Sprint(this.Acc, " ")
+	}
+	output += fmt.Sprint(this.Name, ": ", this.Type)
 	if this.Methods != nil {
 		for _, method := range this.Methods {
-			out += fmt.Sprint("\n", method)
+			output += fmt.Sprint("\n", method)
 		}
 	}
-	return out
+	return output
 }
 
 // Function binds a global identifier and argument list to an expression which
@@ -38,8 +67,9 @@ func (this *Typedef) String () string {
 type Function struct {
 	// Syntax
 	Pos lexer.Position
-	Public     bool       `parser:" @'+'?       "`
+	Acc        *Access    `parser:" @('-' | '#' | '+')? "`
 	Signature  *Signature `parser:" @@          "`
+	LinkName   string     `parser:" @String?    "`
 	Body       Expression `parser:" ( '=' @@ )? "`
 
 	// Semantics
@@ -47,11 +77,18 @@ type Function struct {
 }
 func (*Function) topLevel(){}
 func (this *Function) String () string {
-	if this.Body == nil {
+	output := ""
-		return fmt.Sprint(this.Signature)
+	if this.Acc != nil {
-	} else {
+		output += fmt.Sprint(this.Acc, " ")
-		return fmt.Sprint(this.Signature, " = ", this.Body)
 	}
+	output += this.Signature.String()
+	if this.LinkName != "" {
+		output += fmt.Sprint(" '", this.LinkName, "'")
+	}
+	if this.Body != nil {
+		output += fmt.Sprint(" = ", this.Body)
+	}
+	return output
 }
 
 // Method is like a function, except localized to a defined type. Methods are
@@ -61,9 +98,10 @@ func (this *Function) String () string {
 type Method struct {
 	// Syntax
 	Pos lexer.Position
-	Public     bool       `parser:" @'+'?       "`
+	Acc        *Access    `parser:" @('-' | '#' | '+')? "`
 	TypeName   string     `parser:" @TypeIdent  "`
 	Signature  *Signature `parser:" '.' @@      "`
+	LinkName   string     `parser:" @String?    "`
 	Body       Expression `parser:" ( '=' @@ )? "`
 
 	// Semantics
@@ -73,12 +111,16 @@ type Method struct {
 }
 func (*Method) topLevel(){}
 func (this *Method) String () string {
-	if this.Body == nil {
+	output := ""
-		return fmt.Sprint(this.TypeName, ".", this.Signature)
+	if this.Acc != nil {
-	} else {
+		output += fmt.Sprint(this.Acc, " ")
-		return fmt.Sprint (
-			this.TypeName, ".",
-			this.Signature, " = ",
-			this.Body)
 	}
+	output += fmt.Sprint(this.TypeName, ".", this.Signature)
+	if this.LinkName != "" {
+		output += fmt.Sprint(" '", this.LinkName, "'")
+	}
+	if this.Body != nil {
+		output += fmt.Sprint(" = ", this.Body)
+	}
+	return output
 }

parser/parser_test.go

@@ -143,3 +143,51 @@ BopIt.[twist angle:F64] = { }
 BopIt.[pull distance:Int] = { }
 `)
 }
+
+func TestAccess (test *testing.T) {
+testString (test,
+// correct
+`+ PublicType: Int
+# RestrictedType: (x:Int y:Int)
+- PrivateType: String
+AlsoPrivateType: Byte
++ [publicFn]:Int = 0
+# [restrictedFn]:(x:Int y:Int) = (x:0 y:0)
+- [privateFn]:Rune = 'a'
+[alsoPrivateFn]:Byte = 0
+T: Int
++ T.[publicFn]:Int = 0
+# T.[restrictedFn]:(x:Int y:Int) = (x:0 y:0)
+- T.[privateFn]:Rune = 'a'
+T.[alsoPrivateFn]:Byte = 0`,
+//input
+`
++ PublicType: Int
+# RestrictedType: (x:Int y:Int)
+- PrivateType: String
+AlsoPrivateType: Byte
++ [publicFn]: Int = 0
+# [restrictedFn]: (x:Int y:Int) = (x:0 y:0)
+- [privateFn]: Rune = 'a'
+[alsoPrivateFn]: Byte = 0
+T: Int
++ T.[publicFn]: Int = 0
+# T.[restrictedFn]: (x:Int y:Int) = (x:0 y:0)
+- T.[privateFn]: Rune = 'a'
+T.[alsoPrivateFn]: Byte = 0
+`)
+}
+
+func TestLinkName (test *testing.T) {
+testString (test,
+// correct
+`[puts byte:*:Byte]:Index 'puts'
+File.[write size:Index nmemb:Index]:Index 'fwrite'
+[main]:Int 'main' = 0`,
+// input
+`
+[puts byte:*:Byte]: Index 'puts'
+File.[write size:Index nmemb:Index]: Index 'fwrite'
+[main]: Int 'main' = 0
+`)
+}