Add more string functions: contains(), to_upper() and to_lower()

authors.txt

@@ -32,3 +32,4 @@ Nirbheek Chauhan
 Nicolas Schneider
 Luke Adams
 Rogiel Sulzbach
+Tim-Philipp Müller

mesonbuild/interpreter.py

@@ -2033,6 +2033,10 @@ class Interpreter():
             return obj.strip()
         elif method_name == 'format':
             return self.format_string(obj, args)
+        elif method_name == 'to_upper':
+            return obj.upper()
+        elif method_name == 'to_lower':
+            return obj.lower()
         elif method_name == 'split':
             if len(posargs) > 1:
                 raise InterpreterException('Split()  must have at most one argument.')
@@ -2043,12 +2047,14 @@ class Interpreter():
                 return obj.split(s)
             else:
                 return obj.split()
-        elif method_name == 'startswith' or method_name == 'endswith':
+        elif method_name == 'startswith' or method_name == 'contains' or method_name == 'endswith':
             s = posargs[0]
             if not isinstance(s, str):
                 raise InterpreterException('Argument must be a string.')
             if method_name == 'startswith':
                 return obj.startswith(s)
+            elif method_name == 'contains':
+                return obj.find(s) >= 0
             return obj.endswith(s)
         elif method_name == 'to_int':
             try:

test cases/common/42 string formatting/meson.build

@@ -41,4 +41,28 @@ if long.endswith(prefix)
   error('Not suffix.')
 endif
 
+if not long.contains(prefix)
+  error('Does not contain prefix')
+endif
+
+if not long.contains(suffix)
+  error('Does not contain suffix')
+endif
+
+if not long.contains('bcd')
+  error('Does not contain middle part')
+endif
+
+if long.contains('dc')
+  error('Broken contains')
+endif
+
+if long.to_upper() != 'ABCDE'
+  error('Broken to_upper')
+endif
+
+if long.to_upper().to_lower() != long
+  error('Broken to_lower')
+endif
+
 assert('3'.to_int() == 3, 'String int conversion does not work.')