/antlr-demo

Antlr4 demo for clojure

Primary LanguageJava

Antlr4 demo for Clojure

1. Setting up antlr4

$ cd /usr/local/lib
$ sudo curl -O https://www.antlr.org/download/antlr-4.7.2-complete.jar

$ export CLASSPATH=".:/usr/local/lib/antlr-4.7.2-complete.jar:$CLASSPATH"
$ alias antlr4='java -jar /usr/local/lib/antlr-4.7.2-complete.jar'
$ alias grun='java org.antlr.v4.gui.TestRig'

2. Running examples

$ lein run <grammar> <arg>*

2.1. Examples

  • input file example

    $ lein run labeled-expr data/t.expr
193
17
9

  • STDIN example

    $ lein run labeled-expr
(2+3)*4 <Enter>
<Ctrl-D or Ctrl-Z>
20

2.2. Detailed examples

  • expr (4.1 Matching an Arithmetic Expression Language)

    Generating lexers and parsers
    # in src/java/grammar/expr folder
$ antlr4 -package grammar.expr Expr.g4
    Running an example
    $ lein run expr data/t.expr

  • labeled-expr (4.2 Building a Calculator Using a Visitor)

    Generating lexers and parsers
    # in src/java/grammar/labeledexpr folder
$ antlr4 -package grammar.labeledexpr -no-listener -visitor LabeledExpr.g4
    Running an example
    $ lein run labeled-expr data/t.expr

  • java (4.3 Building a Translator with a Listener)

    Generating lexers and parsers
    # in src/java/grammar/java folder
$ antlr4 -package grammar.java Java.g4
    Running an example
    $ lein run java data/Demo.java

  • rows (4.4 Making Things Happen During the Parse)

    Generating lexers and parsers
    # in src/java/grammar/rows folder
$ antlr4 -package grammar.rows -no-listener Rows.g4
    Running an example
    $ lein run rows data/t.rows

  • serial-id (4.5 Cool Lexical Features)

    Generating lexers and parsers
    # in src/java/grammar/java folder
$ antlr4 -package grammar.java Java.g4
    Running an example
    $ lein run serial-id data/Demo.java

3. License

Distributed under the Eclipse Public License either version 1.0 or any later version.