kaby76 / antlrexamples

Some examples of parsing with Antlr

Ken Domino - kaby76

Current Work

• Antlr5-Specs, Antlr5, the next version of Antlr.
• Trash, a collection of command-line tools that extend Antlr4 with parsing analysis, grammar analysis, parse tree refactoring, and parsing driver template generation.
• g4-scripts, a collection of command-line scripts that use Trash.
• Antlr grammars, adding CI for non-Java targets.
• Scraping the Antlr grammar from the Dart language Specification.
• Antlr4BuildTasks, build rules for C# Antlr4 programs using Antlr tool jar and Java.
• Antlr4Templates, templates for simple Antlr4 console programs.
• Scraping the CFG from the ISO C++ Specs
• Trash on the Web, a website for the static analysis parser generator grammars, including Antlr2, 3, 4, Bison, EBNF, ABNF, Lark, Pest, etc.
• StringTemplate4, updating.
• Antlr, fixing bugs.
• Antlr4 PHP runtime, fixing bugs.
• Antlr4-lab, suggesting new features.
• Scraping the grammar for Java from the online Java language spec
• Automating transformations to optimize the Java grammar for parsing speed.
• Implementing Zhang-Shasha tree diff algorithm in C#, to be applied in grammar diff utility.

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antlrexamples's Issues

New Parser for Shell

Hi, Do you have an Antlr4 parser/lexer for Linux Shell ?
KShell is the best.

BTW, thanks for providing PL1 Parser 2 years ago,
It's very very helpful.

Question about 'EDIT' statement

Many thank you for providing this Antlr4 Grammar.
I just followed from this Issue [https://github.com/antlr/grammars-v4/issues/1752]
It's so hard to find a good PL1 parser in 2020......

This G4 file Pared 80% of my example PL1 source code Successfully, Thanks again.
Here's the question about this G4 file,
For example, I saw the EBNF for "EDIT" is like:
["EDIT" { "(" data_list ")" "(" format_list ")" }+],
Here's a [+] in it, I think it means "dataList" and "formatList" is a set that appears 1 or more times
But from your G4 file ,
[editdataspec : '(' datalist ')' '(' editformatlist ')'], no [+].

Is there any reason to define the "EDIT" grammar like that ?

Multiple include in JavaScript Antlr example

<ItemGroup>
<Antlr4 Include="JavaScriptLexer.g4" />
<Antlr4 Include="JavaScriptParser.g4" />
<Antlr4 Include="JavaScriptLexer.g4" />
<Antlr4 Include="JavaScriptParser.g4" />
</ItemGroup>

Its probably a typo

Source

Flex to ANTLR converter

Do you happen to have a Flex to ANTLR lexer converter, like you do for Bison?

Can your PL/I grammar support no reserved words?

Can the Antlr PL/I grammar parse an assignment to a variable that has same spelling as a keyword? e.g

call = 100;

declare = 100;

goto = if;

/* and */

if if = else then
    else = then;
else
    then = if;

etc.

Also see this: antlr/antlr4#4018