rspivak / lsbasi Goto Github PK

I want to make a compiler for a c++ like language and I want to know how I can change PROCEDURE to functions?

As you metioned in the articles!

I've tried to generate AST in part18 using genastdot.py, but it raised AttributeError: 'ProcedureDecl' object has no attribute 'params'.
This can be fixed by altering self.formal_params on self.params in ProcedureDecl class.

In spi.py (https://github.com/rspivak/lsbasi/blob/master/part15/spi.py), the skip_comment() function (starts on line 172) does not properly handle input source that contains an un-terminated comment.

For example, when run on the input below, spi.py hangs:

PROGRAM Test;
VAR
a : INTEGER;
BEGIN
a := 10 * 25; { Un-terminated comment. FREEZE!
END.

It currently reads """proccall_statement : ID LPAREN expr? (COMMA expr)* RPAREN"""
I believe the correct version is """proccall_statement : ID LPAREN (expr (COMMA expr)*)? RPAREN""", because otherwise foobar(, b, c) would be valid.

If I'm right, then the only additional change is that the while loop

I am trying to make an interpreter of Swarm programing language. If you have some ideas or advices, please contact me.

Here is the repo link.

github.com/ME-Msc/Swarm

github.com/ME-Msc/Swarm-Interpreter

Hello sir~

I love this series post, It's a great tutorial, so, When is the next post coming out？

Given the fantastic work you've done so far, its a real shame to leave it hanging, the work with nested scopes is fantastic and brilliantly explained.

A great topic for the next instalment might be IF blocks with their own scopes

From there you only need some rudimentary input / output and you have a much more complete set of articles...

Hi,
This is mine :

https://github.com/pejman-hkh/4php

Thank you so much for making your Let's build a simple interpreter series, it's really helping me learn how interpreters work while I'm making my own programming language in JavaScript 😄

Hello,

I'm currently going through your tutorial on "Lets build a simple interpreter".
I enjoy reading the tutorial, but I don't really understand why the change in Symbol and SymbolTable from chapter 11 to chapter 13, where much of what we already have defined, you want us to redefine?

Also I encountered, something I don't really understand with the VarSymbol scope property...

I fail to see where VarSymbol.scope.scope_level is defined,

This is from the https://github.com/rspivak/lsbasi/blob/master/part14/src2srccompiler.py#L171

        var_name = node.value
        var_symbol = self.current_scope.lookup(var_name)
        if var_symbol is None:
            raise Exception(
                "Error: Symbol(identifier) not found '%s'" % var_name
            )
        scope_level = str(var_symbol.scope.scope_level)
        return '<%s:%s>' % (var_name + scope_level, var_symbol.type.name)

and roaming around in your spi.py, I cannot find the link to .scope is it possible for you to help me out?

Thanks in advance