Expose integer options to build option files.

docs/markdown/Build-options.md

@@ -16,6 +16,7 @@ Here is a simple option file.
 option('someoption', type : 'string', value : 'optval', description : 'An option')
 option('other_one', type : 'boolean', value : false)
 option('combo_opt', type : 'combo', choices : ['one', 'two', 'three'], value : 'three')
+option('integer_opt', type : 'integer', min : 0, max : 5, value : 3)
 option('free_array_opt', type : 'array', value : ['one', 'two'])
 option('array_opt', type : 'array', choices : ['one', 'two', 'three'], value : ['one', 'two'])
 ```
@@ -39,6 +40,12 @@ A combo allows any one of the values in the `choices` parameter to be
 selected.  If no default value is set then the first value will be the
 default.
 
+## Integers
+
+An integer option contains a single integer with optional upper and
+lower values that are specified with the `min` and `max` keyword
+arguments. Available since Meson version 0.45.0.
+
 ### Arrays
 
 Arrays represent an array of strings. By default the array can contain

docs/markdown/snippets/intopt.md

@@ -0,0 +1,6 @@
+## Integer options
+
+There is a new integer option type with optional minimum and maximum
+values. It can be specified like this in the `meson_options.txt` file:
+
+    option('integer_option', type : 'integer', min : 0, max : 5, value : 3)

mesonbuild/coredata.py

@@ -80,10 +80,16 @@ class UserBooleanOption(UserOption):
 
 class UserIntegerOption(UserOption):
     def __init__(self, name, description, min_value, max_value, value):
-        super().__init__(name, description, [True, False])
+        super().__init__(name, description, None)
         self.min_value = min_value
         self.max_value = max_value
         self.set_value(value)
+        c = []
+        if min_value is not None:
+            c.append('>=' + str(min_value))
+        if max_value is not None:
+            c.append('<=' + str(max_value))
+        self.choices = ', '.join(c)
 
     def set_value(self, newvalue):
         if isinstance(newvalue, str):

mesonbuild/mintro.py

@@ -139,6 +139,8 @@ def add_keys(optlist, options):
         elif isinstance(opt, coredata.UserComboOption):
             optdict['choices'] = opt.choices
             typestr = 'combo'
+        elif isinstance(opt, coredata.UserIntegerOption):
+            typestr = 'integer'
         elif isinstance(opt, coredata.UserArrayOption):
             typestr = 'array'
         else:

mesonbuild/optinterpreter.py

@@ -85,6 +85,16 @@ def ComboParser(name, description, kwargs):
             raise OptionException('Combo choice elements must be strings.')
     return coredata.UserComboOption(name, description, choices, kwargs.get('value', choices[0]))
 
+@permitted_kwargs({'value', 'min', 'max'})
+def IntegerParser(name, description, kwargs):
+    if 'value' not in kwargs:
+        raise OptionException('Integer option must contain value argument.')
+    return coredata.UserIntegerOption(name,
+                                      description,
+                                      kwargs.get('min', None),
+                                      kwargs.get('max', None),
+                                      kwargs['value'])
+
 @permitted_kwargs({'value', 'choices'})
 def string_array_parser(name, description, kwargs):
     if 'choices' in kwargs:
@@ -105,6 +115,7 @@ def string_array_parser(name, description, kwargs):
 option_types = {'string': StringParser,
                 'boolean': BooleanParser,
                 'combo': ComboParser,
+                'integer': IntegerParser,
                 'array': string_array_parser,
                 }
 

test cases/common/47 options/meson.build

@@ -25,3 +25,7 @@ endif
 if get_option('includedir') != 'include'
   error('Incorrect value in builtin option.')
 endif
+
+if get_option('integer_opt') != 3
+  error('Incorrect value in integer option.')
+endif

test cases/common/47 options/meson_options.txt

@@ -3,3 +3,4 @@ option('other_one', type : 'boolean', value : false)
 option('combo_opt', type : 'combo', choices : ['one', 'two', 'combo'], value : 'combo')
 option('array_opt', type : 'array', choices : ['one', 'two', 'three'], value : ['one', 'two'])
 option('free_array_opt', type : 'array')
+option('integer_opt', type : 'integer', min : 0, max : 5, value : 3)