--- /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 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.continuations.ICont;\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.types.Type;\r
+import org.simantics.scl.compiler.types.Types;\r
+import org.simantics.scl.compiler.types.exceptions.MatchException;\r
+\r
+public class GuardedExpressionGroup extends Expression {\r
+ public GuardedExpression[] expressions;\r
+\r
+ public GuardedExpressionGroup(GuardedExpression[] expressions) {\r
+ this.expressions = expressions;\r
+ }\r
+\r
+ @Override\r
+ public void collectRefs(TObjectIntHashMap<Object> allRefs,\r
+ TIntHashSet refs) {\r
+ for(GuardedExpression expression : expressions) {\r
+ for(Expression guard : expression.guards)\r
+ guard.collectRefs(allRefs, refs);\r
+ expression.value.collectRefs(allRefs, refs);\r
+ }\r
+ }\r
+\r
+ @Override\r
+ public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+ TIntHashSet vars) {\r
+ for(GuardedExpression expression : expressions) {\r
+ for(Expression guard : expression.guards)\r
+ guard.collectVars(allVars, vars);\r
+ expression.value.collectVars(allVars, vars);\r
+ }\r
+ }\r
+\r
+ @Override\r
+ protected void updateType() throws MatchException {\r
+ setType(expressions[0].value.getType());\r
+ }\r
+\r
+ @Override\r
+ public IVal toVal(Environment env, CodeWriter w) {\r
+ CodeWriter success = w.createBlock(getType());\r
+ IVal result = success.getParameters()[0];\r
+ CodeWriter failure = w.createBlock();\r
+ compile(env, w, success.getContinuation(), failure.getContinuation());\r
+ w.continueAs(success);\r
+ failure.throw_(location, "Matching failure at: " + toString());\r
+ return result;\r
+ //throw new InternalCompilerError("GuardedExpressionGroup should be handled in match compilation.");\r
+ }\r
+\r
+ @Override\r
+ public void collectFreeVariables(THashSet<Variable> vars) {\r
+ for(GuardedExpression expression : expressions) {\r
+ for(Expression guard : expression.guards)\r
+ guard.collectFreeVariables(vars);\r
+ expression.value.collectFreeVariables(vars);\r
+ }\r
+ }\r
+\r
+ @Override\r
+ public Expression simplify(SimplificationContext context) {\r
+ for(GuardedExpression expression : expressions) {\r
+ for(int i=0;i<expression.guards.length;++i)\r
+ expression.guards[i] = expression.guards[i].simplify(context);\r
+ expression.value = expression.value.simplify(context);\r
+ }\r
+ return this;\r
+ }\r
+\r
+ @Override\r
+ public Expression resolve(TranslationContext context) {\r
+ for(GuardedExpression expression : expressions) {\r
+ for(int i=0;i<expression.guards.length;++i)\r
+ expression.guards[i] = expression.guards[i].resolve(context);\r
+ expression.value = expression.value.resolve(context);\r
+ }\r
+ return this;\r
+ }\r
+ \r
+ @Override\r
+ public Expression checkBasicType(TypingContext context, Type requiredType) {\r
+ for(GuardedExpression expression : expressions) {\r
+ for(int i=0;i<expression.guards.length;++i)\r
+ expression.guards[i] = expression.guards[i].checkType(context, Types.BOOLEAN);\r
+ expression.value = expression.value.checkType(context, requiredType);\r
+ }\r
+ return this;\r
+ }\r
+ \r
+ public void compile(Environment env, CodeWriter firstWriter, ICont success,\r
+ ICont lastFailure) {\r
+ // Create all code blocks\r
+ CodeWriter[] writers = new CodeWriter[expressions.length]; \r
+ ICont[] failures = new ICont[expressions.length];\r
+ writers[0] = firstWriter;\r
+ failures[expressions.length-1] = lastFailure;\r
+ for(int i=1;i<expressions.length;++i) {\r
+ CodeWriter writer = firstWriter.createBlock();\r
+ writers[i] = writer;\r
+ failures[i-1] = writer.getContinuation();\r
+ }\r
+ \r
+ // Compile\r
+ for(int i=0;i<expressions.length;++i) {\r
+ CodeWriter w = writers[i];\r
+ ICont failure = failures[i];\r
+ \r
+ for(Expression guard : expressions[i].guards) {\r
+ CodeWriter nextW = w.createBlock();\r
+ w.if_(guard.toVal(env, w), nextW.getContinuation(), failure);\r
+ w = nextW;\r
+ }\r
+ \r
+ w.jump(success, expressions[i].value.toVal(env, w));\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public Expression replace(ReplaceContext context) {\r
+ GuardedExpression[] newExpressions = new GuardedExpression[expressions.length];\r
+ for(int i=0;i<expressions.length;++i)\r
+ newExpressions[i] = expressions[i].replace(context);\r
+ return new GuardedExpressionGroup(newExpressions); \r
+ }\r
+\r
+ @Override\r
+ public Expression decorate(ExpressionDecorator decorator) {\r
+ for(GuardedExpression expression : expressions)\r
+ expression.decorate(decorator);\r
+ return decorator.decorate(this);\r
+ }\r
+\r
+ @Override\r
+ public void collectEffects(THashSet<Type> effects) {\r
+ for(GuardedExpression ge : expressions) {\r
+ for(Expression guard : ge.guards)\r
+ guard.collectEffects(effects);\r
+ ge.value.collectEffects(effects);\r
+ }\r
+ }\r
+ \r
+ @Override\r
+ public void setLocationDeep(long loc) {\r
+ if(location == Locations.NO_LOCATION) {\r
+ location = loc;\r
+ for(GuardedExpression expression : expressions)\r
+ expression.setLocationDeep(loc);\r
+ }\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
+ for(GuardedExpression expression : expressions)\r
+ expression.forVariables(procedure);\r
+ }\r
+\r
+ @Override\r
+ public Expression accept(ExpressionTransformer transformer) {\r
+ return transformer.transform(this);\r
+ }\r
+}\r
Code Review / simantics / platform.git / blobdiff