Vena v1.6.4 released

Vena v1.6.4 generic has been released

• Welcome to acquire, experience and use the latest stable version

In this version, we have added

1. Brand-new SDK development mode, unified cross-platform development experience, and improved productivity
2. Brand new modular mechanism, easier module expansion
3. Rewrite the standard library to achieve multi-terminal unification and reduce learning costs
4. Green Windows version, no need to install, unzip and play Windows branch 
5. Operator Overloading Mechanism Syntax Details 
6. Complete bilingual keywords in Chinese and English, supported by the standard library
7. Hierarchical GC mechanism wiki 

we fixed

• Vm misbehaves, program crashes when indexing empty objects from v1.6.0
• Vm memory leaks, NewObj().func()the type code has an object that cannot be GC from 1.6.2
• The abnormal syntax error prompt caused by UB, such as the empty statement has an abnormal syntax error from 1.6.2 if xxx :; for xxx :;
• Windows version C library loading problem form 1.6.2
• Vm command misbehaving form 1.6.4-alpha

we published

• Installation package for Linuxlink 
• Binaries for Windowslink 
• img firmware for hlk- w806link 

we updated

1. Grammar documentation
2. sample code
3. README