bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/constants/StringInterpolation.java

   1 package org.simantics.scl.compiler.constants;\r
   2 \r
   3 import org.cojen.classfile.TypeDesc;\r
   4 import org.simantics.scl.compiler.internal.codegen.references.Val;\r
   5 import org.simantics.scl.compiler.internal.codegen.utils.Constants;\r
   6 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;\r
   7 import org.simantics.scl.compiler.types.TVar;\r
   8 import org.simantics.scl.compiler.types.Type;\r
   9 import org.simantics.scl.compiler.types.Types;\r
  10 \r
  11 public class StringInterpolation extends FunctionValue {\r
  12 \r
  13     public static final TypeDesc STRING_BUILDER = TypeDesc.forClass(StringBuilder.class);\r
  14     \r
  15     private final String[] textParts;\r
  16     \r
  17     public StringInterpolation(Type[] parameterTypes, String[] textParts) {\r
  18         super(TVar.EMPTY_ARRAY, Types.NO_EFFECTS, Types.STRING, parameterTypes);\r
  19         this.textParts = textParts;\r
  20     }\r
  21     \r
  22     public StringInterpolation(String[] textParts) {\r
  23         this(stringTypeArray(textParts.length-1), textParts);\r
  24     }\r
  25 \r
  26     private static Type[] stringTypeArray(int length) {\r
  27         Type[] result = new Type[length];\r
  28         for(int i=0;i<length;++i)\r
  29             result[i] = Types.STRING;\r
  30         return result;\r
  31     }\r
  32 \r
  33     @Override\r
  34     public Type applyExact(MethodBuilder mb, Val[] parameters) {\r
  35         mb.newObject(STRING_BUILDER);\r
  36         mb.dup();\r
  37         mb.invokeConstructor(STRING_BUILDER, Constants.EMPTY_TYPEDESC_ARRAY);\r
  38         \r
  39         for(int i=0;i<parameters.length;++i) {\r
  40             String textPart = textParts[i]; \r
  41             if(!textPart.isEmpty()) {\r
  42                 mb.loadConstant(textPart);\r
  43                 mb.invokeVirtual(STRING_BUILDER, "append", STRING_BUILDER, new TypeDesc[] {TypeDesc.STRING});\r
  44             }\r
  45             \r
  46             mb.push(parameters[i], parameterTypes[i]);\r
  47             mb.invokeVirtual(STRING_BUILDER, "append", STRING_BUILDER,\r
  48                     new TypeDesc[] {mb.getJavaTypeTranslator().toTypeDesc(parameterTypes[i])});\r
  49         }\r
  50         \r
  51         {\r
  52             String textPart = textParts[parameters.length]; \r
  53             if(!textPart.isEmpty()) {\r
  54                 mb.loadConstant(textPart);\r
  55                 mb.invokeVirtual(STRING_BUILDER, "append", STRING_BUILDER, new TypeDesc[] {TypeDesc.STRING});\r
  56             }\r
  57         }\r
  58         \r
  59         mb.invokeVirtual(STRING_BUILDER, "toString", TypeDesc.STRING, Constants.EMPTY_TYPEDESC_ARRAY);\r
  60         \r
  61         return Types.STRING;\r
  62     }\r
  63 \r
  64 }\r