Parse loops

parser/expression.go

@@ -62,8 +62,8 @@ func (this *Parser) parseExpressionRootIdent () (entity.Expression, error) {
 	switch name {
 	case "true", "false": return this.parseLiteralBoolean ()
 	case "nil":           return this.parseLiteralNil()
-	case "if":            // TODO
+	case "if":            return this.parseIfElse()
-	case "loop":          // TODO
+	case "loop":          return this.parseLoop()
 	default:              return this.parseVariableOrDeclaration()
 	}
 	panic(this.bug())
@@ -111,3 +111,23 @@ func (this *Parser) parseVariableOrDeclaration () (entity.Expression, error) {
 		return variable, nil
 	}
 }
+
+func (this *Parser) parseIfElse () (*entity.IfElse, error) {
+	// TODO
+	panic(this.bug())
+}
+
+func (this *Parser) parseLoop () (*entity.Loop, error) {
+	err := this.expectDesc("Loop", lexer.Ident)
+	if err != nil { return nil, err }
+	pos := this.pos()
+
+	this.next()
+	body, err := this.parseExpression()
+	if err != nil { return nil, err }
+
+	return &entity.Loop {
+		Position: pos,
+		Body:     body,
+	}, nil
+}