diff options
| -rw-r--r-- | doc/runtime-api.html | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/doc/runtime-api.html b/doc/runtime-api.html index 100fd4ffb..db06d3a4f 100644 --- a/doc/runtime-api.html +++ b/doc/runtime-api.html @@ -650,6 +650,26 @@ visit = case fg e2 of </pre> </p> </span> +<span class="java"> +<p>In order to access the API you first need to generate +one boilerplate Java class with the compiler: +<pre class="java"> +$ gf -make -output-format=java App.pgf +</pre> +This class will expose all functions in the abstract syntax +as methods. Now creating new trees is just a matter of writing ordinary Java +code: +<pre class="java"> +System.out.println(App.DetCN(quant, cn)); +</pre> +If the grammar name is too long to write it in front of every function +name then you can create an instance with a shorter name: +<pre class="java"> +App a = new App(); +System.out.println(a.DetCN(quant, cn)); +</pre> +</p> +</span> <span class="python"> <p> @@ -665,16 +685,16 @@ If there is no matching method name then the runtime will call the method <tt>default</tt>. The following is an example: <pre class="python"> >>> class ExampleVisitor: - def on_DetCN(self,quant,cn): - print("Found DetCN") - cn.visit(self) - - def on_AdjCN(self,adj,cn): - print("Found AdjCN") - cn.visit(self) + def on_DetCN(self,quant,cn): + print("Found DetCN") + cn.visit(self) - def default(self,e): - pass + def on_AdjCN(self,adj,cn): + print("Found AdjCN") + cn.visit(self) + + def default(self,e): + pass >>> e2.visit(ExampleVisitor()) Found DetCN Found AdjCN |