v0.9 (#46)

* always get properties

* update examples

* update travis

* add doctest example

* update example runner

examples/parser-lua/CMakeLists.txt

@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+
+include(../../cmake/CPM.cmake)
+
+# ---- Dependencies ----
+
+CPMAddPackage(
+  NAME Glue
+  GIT_REPOSITORY https://github.com/TheLartians/Glue.git
+  VERSION 0.8.1
+  OPTIONS 
+    "GLUE_ENABLE_LUA ON"
+    "GLUE_BUILD_LUA ON"
+)
+
+CPMAddPackage(
+  NAME LarsParser
+  GIT_REPOSITORY https://github.com/TheLartians/Parser.git
+  VERSION 1.9
+  OPTIONS 
+    "LARS_PARSER_BUILD_GLUE_EXTENSION ON"
+)
+
+# ---- Create binary ----
+
+add_executable(parser-lua main.cpp)
+set_target_properties(parser-lua PROPERTIES CXX_STANDARD 17)
+target_link_libraries(parser-lua LHC LarsParser Glue)

examples/parser-lua/main.cpp

@@ -0,0 +1,46 @@
+#include <lars/parser/extension.h>
+#include <glue/lua.h>
+#include <stdexcept>
+#include <iostream>
+
+int main() {
+  auto lua = glue::LuaState();
+  lua.openStandardLibs();
+
+  lua["parser"] = lars::glue::parser();
+  
+  lua.run(R"(
+    wordParser = parser.Program.create()
+
+    wordParser:setRule("Whitespace", "[ \t]")
+    wordParser:setSeparatorRule("Whitespace")
+
+    wordParser:setRule("Word", "[a-zA-Z]+")
+    
+    wordParser:setRuleWithCallback("Words", "Word*", function(e) 
+      local N = e:size()
+      local res = {}
+      for i=0,N-1 do res[#res+1] = e:get(i):string() end
+      return res
+    end)
+
+    wordParser:setStartRule("Words")
+  )");
+
+  lua.run(R"(
+    while true do
+      print("please enter some words or 'quit' to exit");
+      local input = io.read();
+      if input == "quit" then os.exit() end
+      local result
+      ok, err = pcall(function() result = wordParser:run(input) end)
+      if ok then
+        print("you entered " .. #result .. " words!")
+      else 
+        print("error: " .. tostring(err))
+      end
+    end
+  )");
+
+  return 0;
+}