Add Meson language (#3463)

samples/Meson/filenames/meson.build

@@ -0,0 +1,51 @@
+project('test', ['c'],
+  version: '0.1.0'
+)
+
+# This is a comment test('foo')
+
+add_global_arguments(['-foo'])
+add_global_link_arguments(['-foo'])
+
+gnome = import('gnome') # As is this
+
+gnome.do_something('test')
+
+meson.source_root()
+
+foreach foo: bar
+  foreach baz : foo
+    message(baz)
+  endforeach
+endforeach
+
+blah = '''
+afjoakjflajf  # Test
+lflkasjf
+test\'test
+test\\\\test
+test\ntest
+'''
+
+foo = ''
+foo = ''''''
+foo = 'string'
+foo = '''string2'''
+foo = 12314
+foo = 1231.1231
+foo = true
+foo = false
+foo = ['te\'st', 1, 3.3, '''test''']
+foo += 1231
+foo = '@0@'.format('test')
+foo = include_directories('foo', kwarg: 'bar', include_directories: 'foo')
+foo = true ? 'true' : 'false'
+foo = 2 - 1 + 3 % 8 / 4 * 3
+
+if true and false
+elif false or true
+elif true not false
+elif foo == 12
+elif (foo != 124) and (foo <= 200)
+else
+endif

samples/Meson/filenames/meson_options.txt

@@ -0,0 +1,3 @@
+option('with-something', type: 'boolean',
+  value: true,
+)