CMake: pro2cmake.py: Handle for loops without block

Handle for loops with a single line of instructions and add a test
for that.

Change-Id: I041ae30f64abcbd3db7df29933647f047b92ede3
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

util/cmake/pro2cmake.py

@@ -568,11 +568,13 @@ class QmakeParser:
              + pp.nestedExpr(opener='{', closer='}', ignoreExpr=pp.LineEnd()))  # ignore the whole thing...
         ForLoop = pp.Suppress(pp.Keyword('for') + CallArgs
              + pp.nestedExpr(opener='{', closer='}', ignoreExpr=pp.LineEnd()))  # ignore the whole thing...
+        ForLoopSingleLine = pp.Suppress(pp.Keyword('for') + CallArgs
+             + pp.Literal(':') + pp.SkipTo(EOL, ignore=LC))  # ignore the whole thing...
         FunctionCall = pp.Suppress(Identifier + pp.nestedExpr())
 
         Scope = pp.Forward()
 
-        Statement = pp.Group(Load | Include | Option | ForLoop \
+        Statement = pp.Group(Load | Include | Option | ForLoop | ForLoopSingleLine \
             | DefineTestDefinition | FunctionCall | Operation)
         StatementLine = Statement + (EOL | pp.FollowedBy('}'))
         StatementGroup = pp.ZeroOrMore(StatementLine | Scope | pp.Suppress(EOL))

util/cmake/tests/data/single_line_for.pro

@@ -0,0 +1,4 @@
+for(d, sd): \
+    exists($$d/$${d}.pro): \
+        SUBDIRS += $$d
+

util/cmake/tests/test_parsing.py

@@ -180,6 +180,12 @@ def test_for():
     assert result[1] == []
 
 
+def test_single_line_for():
+    result = parse_file(_tests_path + '/data/single_line_for.pro')
+    assert len(result) == 1
+    assert result[0] == []
+
+
 def test_unset():
     result = parse_file(_tests_path + '/data/unset.pro')
     assert len(result) == 1