--- /dev/null
+package org.simantics.scl.compiler.elaboration.expressions;\r
+\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+import gnu.trove.set.hash.THashSet;\r
+import gnu.trove.set.hash.TIntHashSet;\r
+\r
+import java.util.ArrayList;\r
+\r
+import org.simantics.scl.compiler.common.names.Name;\r
+import org.simantics.scl.compiler.common.precedence.Precedence;\r
+import org.simantics.scl.compiler.constants.Constant;\r
+import org.simantics.scl.compiler.elaboration.contexts.ReplaceContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.TypingContext;\r
+import org.simantics.scl.compiler.elaboration.errors.NotPatternException;\r
+import org.simantics.scl.compiler.elaboration.expressions.lhstype.LhsType;\r
+import org.simantics.scl.compiler.elaboration.expressions.lhstype.PatternMatchingLhs;\r
+import org.simantics.scl.compiler.elaboration.modules.SCLValue;\r
+import org.simantics.scl.compiler.environment.Environment;\r
+import org.simantics.scl.compiler.errors.Locations;\r
+import org.simantics.scl.compiler.internal.codegen.references.IVal;\r
+import org.simantics.scl.compiler.internal.codegen.writer.CodeWriter;\r
+import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;\r
+import org.simantics.scl.compiler.internal.interpreted.IConstant;\r
+import org.simantics.scl.compiler.internal.interpreted.IExpression;\r
+import org.simantics.scl.compiler.top.ExpressionInterpretationContext;\r
+import org.simantics.scl.compiler.top.SCLCompilerConfiguration;\r
+import org.simantics.scl.compiler.top.ValueNotFound;\r
+import org.simantics.scl.compiler.types.TForAll;\r
+import org.simantics.scl.compiler.types.TMetaVar;\r
+import org.simantics.scl.compiler.types.Type;\r
+import org.simantics.scl.compiler.types.Types;\r
+import org.simantics.scl.compiler.types.exceptions.MatchException;\r
+import org.simantics.scl.compiler.types.util.MultiFunction;\r
+import org.simantics.scl.compiler.types.util.TypeUnparsingContext;\r
+\r
+public class EConstant extends Expression {\r
+ SCLValue value;\r
+ Type[] typeParameters;\r
+ \r
+ public EConstant(SCLValue value, Type ... typeParameters) {\r
+ if(SCLCompilerConfiguration.DEBUG)\r
+ if(value == null)\r
+ throw new NullPointerException();\r
+ this.value = value;\r
+ this.typeParameters = typeParameters;\r
+ }\r
+\r
+ public EConstant(SCLValue value) {\r
+ if(SCLCompilerConfiguration.DEBUG)\r
+ if(value == null)\r
+ throw new NullPointerException();\r
+ this.value = value;\r
+ this.typeParameters = Type.EMPTY_ARRAY;\r
+ }\r
+\r
+ public EConstant(long loc, SCLValue value) {\r
+ super(loc);\r
+ if(SCLCompilerConfiguration.DEBUG)\r
+ if(value == null)\r
+ throw new NullPointerException();\r
+ this.value = value;\r
+ this.typeParameters = Type.EMPTY_ARRAY;\r
+ }\r
+ \r
+ public EConstant(long loc, SCLValue value, Type ... typeParameters) {\r
+ super(loc);\r
+ if(SCLCompilerConfiguration.DEBUG)\r
+ if(value == null)\r
+ throw new NullPointerException();\r
+ this.value = value;\r
+ this.typeParameters = typeParameters;\r
+ }\r
+\r
+ public void addTypeParameters(Type ... newTypeParameters) {\r
+ typeParameters = Types.concat(typeParameters, newTypeParameters);\r
+ }\r
+ \r
+ public Expression applyType(Type type) {\r
+ typeParameters = Types.concat(typeParameters, new Type[] {type});\r
+ if(getType() != null)\r
+ setType(Types.instantiate(getType(), type));\r
+ return this;\r
+ }\r
+\r
+ public void collectRefs(TObjectIntHashMap<Object> allRefs, TIntHashSet refs) {\r
+ int id = allRefs.get(value);\r
+ if(id >= 0)\r
+ refs.add(id);\r
+ }\r
+ \r
+ @Override\r
+ public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+ TIntHashSet vars) { \r
+ }\r
+\r
+ public void toString(StringBuilder b, TypeUnparsingContext tuc) {\r
+ Name name = value.getName();\r
+ if(name.module.equals("Builtin") || name.module.equals("Prelude"))\r
+ b.append(name.name);\r
+ else\r
+ b.append(name);\r
+ /*for(Type type : typeParameters) {\r
+ b.append(" <");\r
+ b.append(type.toString(tuc));\r
+ b.append(">");\r
+ }*/\r
+ }\r
+\r
+ @Override\r
+ protected void updateType() throws MatchException {\r
+ setType(Types.instantiate(value.getType(), typeParameters));\r
+ }\r
+ \r
+ @Override\r
+ public IVal toVal(Environment env, CodeWriter w) {\r
+ IVal val = value.getValue(); \r
+ if(typeParameters.length > 0) {\r
+ val = val.createSpecialization(typeParameters);\r
+ }\r
+ return val;\r
+ }\r
+\r
+ @Override\r
+ public void collectFreeVariables(THashSet<Variable> vars) {\r
+ }\r
+\r
+ @Override\r
+ public Expression simplify(SimplificationContext context) {\r
+ if(value.getInlineInSimplification()) {\r
+ if(typeParameters.length > 0) {\r
+ context.getErrorLog().log(location, \r
+ "Inlining with type parameters not currently supported in simplification.");\r
+ return this;\r
+ }\r
+ else\r
+ return value.getExpression().copy().simplify(context);\r
+ }\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression resolve(TranslationContext context) {\r
+ return this;\r
+ }\r
+ \r
+ @Override\r
+ public void getParameters(TranslationContext translationContext,\r
+ ArrayList<Expression> parameters) {\r
+ }\r
+ \r
+ public SCLValue getValue() {\r
+ return value;\r
+ }\r
+ \r
+ @Override\r
+ public Expression resolveAsPattern(TranslationContext context) {\r
+ return this;\r
+ }\r
+ \r
+ @Override\r
+ public void removeFreeVariables(THashSet<Variable> vars) { \r
+ }\r
+\r
+ @Override\r
+ public Expression replace(ReplaceContext context) {\r
+ Type[] newTypeParameters;\r
+ if(typeParameters.length == 0)\r
+ newTypeParameters = Type.EMPTY_ARRAY;\r
+ else {\r
+ newTypeParameters = new Type[typeParameters.length];\r
+ for(int i=0;i<newTypeParameters.length;++i)\r
+ newTypeParameters[i] = typeParameters[i].replace(context.tvarMap);\r
+ }\r
+ return new EConstant(value, newTypeParameters);\r
+ }\r
+ \r
+ public Type[] getTypeParameters() {\r
+ return typeParameters;\r
+ }\r
+\r
+ @Override\r
+ public LhsType getLhsType() throws NotPatternException {\r
+ return new PatternMatchingLhs();\r
+ }\r
+ \r
+ @Override\r
+ public IExpression toIExpression(ExpressionInterpretationContext target) {\r
+ Name name = value.getName();\r
+ try {\r
+ return new IConstant(target.runtimeEnvironment.getRuntimeModule(name.module).getValue(name.name));\r
+ } catch (ValueNotFound e) {\r
+ throw new UnsupportedOperationException();\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public Expression inferType(TypingContext context) {\r
+ if(context.recursiveValues != null &&\r
+ context.recursiveValues.contains(value)) {\r
+ // Handles the case where the constant is one of the recursive definitions we are currently checking\r
+ // This kind of value is not yet generalized, i.e. it is not necessary to instantiate it.\r
+ EPlaceholder placeholder = new EPlaceholder(location, this);\r
+ placeholder.setType(value.getType());\r
+ \r
+ context.recursiveReferences.add(placeholder);\r
+ return placeholder;\r
+ }\r
+ else if(context.isInPattern()) {\r
+ /* This is little hackish code that handles the following kind of constructors:\r
+ * data Thunk a = Thunk s (a -> s)\r
+ * in\r
+ * match thunk with Thunk s f -> f s\r
+ * We cannot assign s with an unbound metaVar because its type depends on \r
+ * how it has been constructed. Therefore we parametrize the function with\r
+ * existential variable.\r
+ */\r
+ Type resultType = value.getType();\r
+ if(resultType instanceof TForAll) {\r
+ ArrayList<TMetaVar> vars = new ArrayList<TMetaVar>(); \r
+ resultType = Types.instantiate(resultType, vars);\r
+ MultiFunction mfun = Types.matchFunction(resultType);\r
+ resultType = mfun.returnType;\r
+ \r
+ for(TMetaVar var : vars) {\r
+ if(resultType.contains(var))\r
+ break;\r
+ addTypeParameters(Types.var(var.getKind())); \r
+ }\r
+ }\r
+ return this;\r
+ }\r
+ else\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression decorate(ExpressionDecorator decorator) {\r
+ return decorator.decorate(this);\r
+ }\r
+ \r
+ @Override\r
+ public boolean isEffectful() {\r
+ return false;\r
+ }\r
+\r
+ @Override\r
+ public void collectEffects(THashSet<Type> effects) {\r
+ }\r
+ \r
+ @Override\r
+ public void setLocationDeep(long loc) {\r
+ if(location == Locations.NO_LOCATION)\r
+ location = loc;\r
+ }\r
+ \r
+ @Override\r
+ public void accept(ExpressionVisitor visitor) {\r
+ visitor.visit(this);\r
+ }\r
+ \r
+ @Override\r
+ public Precedence getPrecedence() {\r
+ return value.getPrecedence();\r
+ }\r
+\r
+ @Override\r
+ public void forVariables(VariableProcedure procedure) {\r
+ }\r
+ \r
+ @Override\r
+ public boolean isPattern(int arity) {\r
+ IVal val = value.getValue();\r
+ if(!(val instanceof Constant))\r
+ return false;\r
+ Constant constant = (Constant)val;\r
+ return constant.constructorTag() >= 0 && constant.getArity() == arity;\r
+ }\r
+ \r
+ @Override\r
+ public Expression accept(ExpressionTransformer transformer) {\r
+ return transformer.transform(this);\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff