https://github.com/3forges/poc-antlr

https://github.com/3forges/poc-antlr

Last synced: 7 days ago
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• Host: GitHub
• URL: https://github.com/3forges/poc-antlr
• Owner: 3forges
• Created: 2023-10-11T19:25:18.000Z (about 1 year ago)
• Default Branch: master
• Last Pushed: 2023-10-11T19:27:04.000Z (about 1 year ago)
• Last Synced: 2024-04-01T16:09:30.631Z (9 months ago)
• Language: TypeScript
• Size: 15.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
* Install antlr for typescript cli :

```bash

# first install openjdk https://learn.microsoft.com/en-us/java/openjdk/download#openjdk-21

# -- 

# 

#   $ java --version

#   openjdk 18.0.2 2022-07-19

#   OpenJDK Runtime Environment (build 18.0.2+9-61)

#   OpenJDK 64-Bit Server VM (build 18.0.2+9-61, mixed mode, sharing)

# 

# --

npm i -g antlr4ts-cli

java --version

antlr4ts --version

```

* then create a first language compiler :

```bash

export LANG_EXAMPLE_NAME="coolnthe_lang"

mkdir -p ./${LANG_EXAMPLE_NAME}/

cat <./${LANG_EXAMPLE_NAME}/${LANG_EXAMPLE_NAME}.g4

grammar ${LANG_EXAMPLE_NAME};

file:          (expr ';' | declaration ';' | assignment ';')+ EOF;

declaration:   VAR IDENTIFIER;

expr:          IDENTIFIER (OP IDENTIFIER)?;

assignment:    IDENTIFIER '=' (NUMBER | expr);

if_statement:  IF '(' expr ')' THEN '{' command '}' (ELSE '{' command '}')?;

command:       STOP | CONTINUE | if_statement | assignment;

IDENTIFIER:    WORD (NUMBER | WORD)*;

IF:            'if';

THEN:          'then';

ELSE:          'else';

OP:            '+' | '-' | '*' | '/';

STOP:          'stop';

CONTINUE:      'continue';

VAR:           'var';

NUMBER:        [1–9]+;

WORD:          [a-z]+;

SPACES:        [\t\r\n ]+ -> skip;

EOF

antlr4ts -visitor -o ./${LANG_EXAMPLE_NAME}/generated ./${LANG_EXAMPLE_NAME}/${LANG_EXAMPLE_NAME}.g4

```