--- /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.exceptions.InternalCompilerError;\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.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.IExpression;\r
+import org.simantics.scl.compiler.internal.interpreted.IVariable;\r
+import org.simantics.scl.compiler.top.ExpressionInterpretationContext;\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.kinds.Kinds;\r
+import org.simantics.scl.compiler.types.util.TypeUnparsingContext;\r
+\r
+public class EVariable extends Expression {\r
+ public static final EVariable[] EMPTY_ARRAY = new EVariable[0];\r
+ \r
+ Variable variable;\r
+ \r
+ public EVariable(Variable variable) {\r
+ this.variable = variable;\r
+ }\r
+\r
+ public EVariable(long loc, Variable variable) {\r
+ super(loc);\r
+ this.variable = variable;\r
+ }\r
+\r
+ public Variable getVariable() {\r
+ return variable;\r
+ }\r
+ \r
+ public void setVariable(Variable variable) {\r
+ this.variable = variable;\r
+ }\r
+\r
+ public void collectRefs(TObjectIntHashMap<Object> allRefs, TIntHashSet refs) {\r
+ }\r
+ \r
+ @Override\r
+ public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+ TIntHashSet vars) {\r
+ int id = allVars.get(variable);\r
+ if(id >= 0)\r
+ vars.add(id);\r
+ }\r
+\r
+ public void toString(StringBuilder b, TypeUnparsingContext tuc) {\r
+ b.append(variable == null ? "???" : variable.toString());\r
+ }\r
+\r
+ @Override\r
+ protected void updateType() throws MatchException {\r
+ setType(variable.getType());\r
+ }\r
+ \r
+ @Override\r
+ public IVal toVal(Environment env, CodeWriter w) {\r
+ return variable.getVal();\r
+ }\r
+\r
+ @Override\r
+ public void collectFreeVariables(THashSet<Variable> vars) {\r
+ vars.add(variable);\r
+ }\r
+\r
+ @Override\r
+ public Expression simplify(SimplificationContext context) {\r
+ Expression expression = context.getInlinedValue(variable);\r
+ if(expression != null)\r
+ return expression.copy();\r
+ else\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
+ @Override\r
+ public void removeFreeVariables(THashSet<Variable> vars) {\r
+ vars.remove(variable);\r
+ }\r
+ \r
+ @Override\r
+ public Expression resolveAsPattern(TranslationContext context) {\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression replace(ReplaceContext context) {\r
+ if(context.inPattern) {\r
+ Type type = variable.getType().replace(context.tvarMap);\r
+ \r
+ Variable newVariable = new Variable(variable.name);\r
+ newVariable.setType(type);\r
+ EVariable result = new EVariable(newVariable);\r
+ context.varMap.put(variable, result);\r
+ return result;\r
+ }\r
+ else {\r
+ if(variable == null) {\r
+ EVariable newVariable = new EVariable(location, null);\r
+ newVariable.setType(getType().replace(context.tvarMap));\r
+ if(context.typingContext == null)\r
+ throw new InternalCompilerError(location, "Encountered unresolved variable but not in type checking phase.");\r
+ context.typingContext.addConstraintDemand(newVariable);\r
+ return newVariable;\r
+ }\r
+ else {\r
+ Expression expression = context.varMap.get(variable);\r
+ if(expression != null)\r
+ return expression.copy(context.typingContext);\r
+ else {\r
+ return new EVariable(variable);\r
+ }\r
+ }\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public IExpression toIExpression(ExpressionInterpretationContext target) {\r
+ return new IVariable(target.getVariableId(variable));\r
+ }\r
+ \r
+ @Override\r
+ public Expression inferType(TypingContext context) {\r
+ if(context.isInPattern())\r
+ variable.setType(Types.metaVar(Kinds.STAR));\r
+ return this;\r
+ }\r
+ \r
+ @Override\r
+ public Expression checkBasicType(TypingContext context, Type requiredType) {\r
+ if(context.isInPattern()) {\r
+ variable.setType(requiredType);\r
+ return this;\r
+ }\r
+ else\r
+ return context.subsume(this, requiredType);\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 void forVariables(VariableProcedure procedure) {\r
+ if(variable != null)\r
+ procedure.execute(location, variable);\r
+ }\r
+ \r
+ @Override\r
+ public boolean isPattern(int arity) {\r
+ return arity == 0;\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