From 3eea1703ffb7559cc7d7454ced119aa45c167c9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim-Philipp=20M=C3=BCller?= <tim@centricular.com>
Date: Sat, 19 Mar 2016 17:57:11 +0000
Subject: Add bool to_string() and to_int() methods

bool to_int() will return 0 or 1, useful if one wants to set
a define to 0 or 1 based on a boolean result instead of having
it just defined or undefined.

bool to_string() will return 'true' or 'false' by default same
as when using it to format a string, but with the additional
possibility to specify two extra string arguments to be returned
as true/false values, e.g. to_string('yes', 'no'). This can be
useful when outputting messages to be shown to the user.
---
 mesonbuild/interpreter.py | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'mesonbuild/interpreter.py')

diff --git a/mesonbuild/interpreter.py b/mesonbuild/interpreter.py
index 35cbc3e..d7cf837 100644
--- a/mesonbuild/interpreter.py
+++ b/mesonbuild/interpreter.py
@@ -2017,6 +2017,30 @@ class Interpreter():
             reduced_pos = [reduced_pos]
         return (reduced_pos, reduced_kw)
 
+    def bool_method_call(self, obj, method_name, args):
+        obj = self.to_native(obj)
+        (posargs, _) = self.reduce_arguments(args)
+        if method_name == 'to_string':
+           if len(posargs) == 0:
+             if obj == True:
+               return 'true'
+             else:
+               return 'false'
+           elif len(posargs) == 2 and isinstance(posargs[0], str) and isinstance(posargs[1], str):
+             if obj == True:
+               return posargs[0]
+             else:
+               return posargs[1]
+           else:
+               raise InterpreterException('bool.to_string() must have either no arguments or exactly two string arguments.')
+        elif method_name == 'to_int':
+          if obj == True:
+            return 1
+          else:
+            return 0
+        else:
+            raise InterpreterException('Unknown method "%s" for a boolean.' % method_name)
+
     def string_method_call(self, obj, method_name, args):
         obj = self.to_native(obj)
         (posargs, _) = self.reduce_arguments(args)
@@ -2089,6 +2113,8 @@ class Interpreter():
             obj = obj.get_value()
         if isinstance(obj, str):
             return self.string_method_call(obj, method_name, args)
+        if isinstance(obj, bool):
+            return self.bool_method_call(obj, method_name, args)
         if isinstance(obj, list):
             return self.array_method_call(obj, method_name, self.reduce_arguments(args)[0])
         if not isinstance(obj, InterpreterObject):
-- 
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