diff options
Diffstat (limited to 'Xamarin.Forms.Build.Tasks')
-rw-r--r-- | Xamarin.Forms.Build.Tasks/CompiledConverters/ConstraintTypeConverter.cs | 28 | ||||
-rw-r--r-- | Xamarin.Forms.Build.Tasks/Xamarin.Forms.Build.Tasks.csproj | 1 |
2 files changed, 29 insertions, 0 deletions
diff --git a/Xamarin.Forms.Build.Tasks/CompiledConverters/ConstraintTypeConverter.cs b/Xamarin.Forms.Build.Tasks/CompiledConverters/ConstraintTypeConverter.cs new file mode 100644 index 00000000..18b1810c --- /dev/null +++ b/Xamarin.Forms.Build.Tasks/CompiledConverters/ConstraintTypeConverter.cs @@ -0,0 +1,28 @@ +using System.Collections.Generic; +using System.Globalization; +using System.Linq; + +using Mono.Cecil; +using Mono.Cecil.Cil; + +using Xamarin.Forms.Xaml; + +namespace Xamarin.Forms.Core.XamlC +{ + class ConstraintTypeConverter : ICompiledTypeConverter + { + public IEnumerable<Instruction> ConvertFromString(string value, ModuleDefinition module, BaseNode node) + { + double size; + + if (string.IsNullOrEmpty(value) || !double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out size)) + throw new XamlParseException($"Cannot convert \"{value}\" into {typeof(Constraint)}", node); + + yield return Instruction.Create(OpCodes.Ldc_R8, size); + + var constantDef = module.Import(typeof(Constraint)).Resolve().Methods.FirstOrDefault(md => md.IsStatic && md.Name == "Constant"); + var constantRef = module.Import(constantDef); + yield return Instruction.Create(OpCodes.Call, constantRef); + } + } +} diff --git a/Xamarin.Forms.Build.Tasks/Xamarin.Forms.Build.Tasks.csproj b/Xamarin.Forms.Build.Tasks/Xamarin.Forms.Build.Tasks.csproj index c845b597..9507ea3c 100644 --- a/Xamarin.Forms.Build.Tasks/Xamarin.Forms.Build.Tasks.csproj +++ b/Xamarin.Forms.Build.Tasks/Xamarin.Forms.Build.Tasks.csproj @@ -101,6 +101,7 @@ <Compile Include="Logger.cs" /> <Compile Include="XamlTask.cs" /> <Compile Include="CompiledMarkupExtensions\ArrayExtension.cs" /> + <Compile Include="CompiledConverters\ConstraintTypeConverter.cs" /> </ItemGroup> <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /> <Target Name="AfterBuild"> |