QMake Parser: Fix curly braces in assignmentsHEADdev

In QMake, literal values can contain curly braces:
    A = foo{bar}

Assignments can also have multiple opening curly braces and the same
amount or less closing curly braces:
    A = { { { }

The following is invalid in QMake:
    A = { } }

A matching curly brace in an assignment doesn't close the current scope:
    true {
        A = { foo }
    }

Fix the parser grammar to allow the cases above. In order to do that we
had to:
- allow curly braces in LiteralValuePart
- add an alternative to Value to allow {} being parsed as one string
- add an alternative to Value to allow values that are surrounded by curly
  braces

Caveats: The scope handling is still a bit wonky. For instance, we don't
support
    A = else
which certainly is an edge case.

Task-number: QTBUG-123132
Fixes: QTBUG-137322
Change-Id: I3aab8075ccbac6161dfc4431260f21392eeaf652
Reviewed-by: Alexandru Croitor <[email protected]>

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/test_parsing.py b/tests/test_parsing.py
index be188a4..3668ad5 100755
--- a/tests/test_parsing.py
+++ b/tests/test_parsing.py
@@ -358,3 +358,21 @@ def test_condition_operator_precedence():
     validate_simplify(result[0]["condition"], "a1 OR a2")
     validate_simplify(result[1]["condition"], "b3 AND (b1 OR b2)")
     validate_simplify(result[2]["condition"], "c4 OR (c1 AND c3) OR (c2 AND c3)")
+
+
+def test_assignment_with_braces():
+    result = parse_file(_tests_path + '/data/assignment_with_braces.pro')
+    assert len(result) == 5
+
+    validate_op('A', '=', ['{}', 'foo{bar}'], result[0])
+    validate_op('B', '=', ['{', '}'], result[1])
+    validate_op('C', '=', ['{', '{', '{', '}'], result[2])
+
+    assert 'condition' in result[3]
+    assert result[3]['condition'] == 'true'
+    true_statements = result[3]['statements']
+    assert len(true_statements) == 3
+
+    validate_op('D', '=', ['{', 'foo', '}'], true_statements[0])
+    validate_op('E', '=', ['{', 'one', '{', 'two', '}', 'three', '}'], true_statements[1])
+    validate_op('F', '=', ['zero', '{', 'one', '{', 'two', '}', 'three', '}', 'four'], true_statements[2])