Compiler construction – converts an abstract syntax tree into bytecode

I'm trying to learn how to build a simple compiler as a hobby My goal is java virtual machine

I wrote a simple syntax for eclipse using the ANTLR plug - in

Someone told me that there is a known method node on the ast generated by ANTLR, which must be called I intend to use ASM to generate bytecode So what is a method node? How do I call it from ASM and make it access method instructions?

What about the compiler's semantic analyzer? Should I write it manually or do I have any generators?

Solution

You asked a lot of irrelevant questions here Depending on the language you define, there may be method nodes in your language, or if your language is unconditionally compiled as a main (string []) method, there will be no method nodes

There are many ways to convert AST to target language In most cases, instead of generating code directly, you generate an ast for your target platform and use a tree walker to generate code through a beautiful printer

Semantic analysis is compiler programming At the grammatical level, reading and understanding input is parsing You need to write your own semantic parser, otherwise you won't write a compiler at all

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