-package org.simantics.scl.compiler.elaboration.expressions;\r
-\r
-import java.util.ArrayList;\r
-\r
-import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;\r
-import org.simantics.scl.compiler.common.names.Names;\r
-import org.simantics.scl.compiler.common.precedence.Associativity;\r
-import org.simantics.scl.compiler.common.precedence.Precedence;\r
-import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;\r
-import org.simantics.scl.compiler.elaboration.errors.NotPatternException;\r
-import org.simantics.scl.compiler.elaboration.expressions.lhstype.FunctionDefinitionLhs;\r
-import org.simantics.scl.compiler.elaboration.expressions.lhstype.LhsType;\r
-import org.simantics.scl.compiler.elaboration.modules.SCLValue;\r
-import org.simantics.scl.compiler.errors.Locations;\r
-\r
-\r
-\r
-public class EBinary extends ASTExpression {\r
- public static final int NEGATION_LEVEL = 6;\r
- \r
- public Expression left;\r
- public ArrayList<EBinaryRightSide> rights = new ArrayList<EBinaryRightSide>();\r
- public EVar negation;\r
-\r
- public EBinary(Expression left, EVar negation) {\r
- this.left = left;\r
- this.negation = negation;\r
- }\r
-\r
- private EBinary(Expression left, EVar operator, Expression right) {\r
- this.left = left;\r
- rights.add(new EBinaryRightSide(operator, right));\r
- }\r
-\r
- public static EBinary create(Expression left, EVar operator, Expression right) {\r
- if(left instanceof EBinary) {\r
- EBinary left_ = (EBinary)left;\r
- left_.rights.add(new EBinaryRightSide(operator, right));\r
- return left_;\r
- }\r
- else\r
- return new EBinary(left, operator, right);\r
- }\r
-\r
- @Override\r
- public Expression resolve(TranslationContext context) {\r
- return parseOperators(context).resolve(context);\r
- }\r
- \r
- public Expression parseOperators(TranslationContext context) {\r
- ArrayList<Expression> output = new ArrayList<Expression>();\r
- ArrayList<Expression> ops = new ArrayList<Expression>();\r
- ArrayList<EVar> opAsts = new ArrayList<EVar>();\r
- \r
- EVar negation = this.negation;\r
- \r
- output.add(left);\r
- for(EBinaryRightSide right : rights) {\r
- // Read op\r
- Expression op = context.resolveExpression(right.operator.location, right.operator.name);\r
- if(op == null)\r
- return new EError(location);\r
- Precedence opPrec = op.getPrecedence();\r
- while(!ops.isEmpty()) {\r
- Expression oldOp = ops.get(ops.size()-1);\r
- Precedence oldOpPrecedence = oldOp.getPrecedence();\r
- \r
- if(oldOpPrecedence.level < opPrec.level)\r
- break;\r
- if(oldOpPrecedence.level == opPrec.level) {\r
- if(opPrec.associativity == Associativity.RIGHT)\r
- break;\r
- if(opPrec.associativity == Associativity.NONASSOC) {\r
- context.getErrorLog().log(right.operator.location, \r
- "Operator " + right.operator.name + " is not associative.");\r
- return new EError(location); \r
- }\r
- }\r
- \r
- // Pop op \r
- ops.remove(ops.size()-1);\r
- Expression r = output.remove(output.size()-1);\r
- Expression l = output.remove(output.size()-1);\r
- output.add(binary(l, oldOp, opAsts.remove(opAsts.size()-1), r));\r
- }\r
- if(negation != null && ops.isEmpty()) {\r
- if(opPrec.level <= NEGATION_LEVEL) { \r
- SCLValue neg = context.getEnvironment().getValue(Names.Prelude_neg);\r
- if(neg == null) {\r
- context.getErrorLog().log(location, \r
- "Couldn't resolve variable neg.");\r
- return new EError(location);\r
- }\r
- output.set(0, unary(neg, negation, output.get(0)));\r
- negation = null;\r
- }\r
- }\r
- ops.add(op);\r
- opAsts.add(right.operator);\r
- \r
- // Read value\r
- output.add(right.right);\r
- }\r
- \r
- // Pop rest\r
- while(!ops.isEmpty()) { \r
- Expression oldOp = ops.remove(ops.size()-1);\r
- Expression r = output.remove(output.size()-1);\r
- Expression l = output.remove(output.size()-1);\r
- output.add(binary(l, oldOp, opAsts.remove(opAsts.size()-1), r));\r
- }\r
- if(negation != null) {\r
- SCLValue neg = context.getEnvironment().getValue(Names.Prelude_neg);\r
- if(neg == null) {\r
- context.getErrorLog().log(location, \r
- "Couldn't resolve variable neg.");\r
- return new EError(location);\r
- }\r
- output.set(0, unary(neg, negation, output.get(0)));\r
- }\r
- \r
- return output.get(0);\r
- \r
- //System.out.println("parseOperators: " + this);\r
- //return parse(context, left, rights.listIterator(), new Precedence(-1, Associativity.NONASSOC));\r
- }\r
-\r
- /*\r
- private Expression parse(TranslationContext context,\r
- Expression lhs, ListIterator<EBinaryRightSide> it, Precedence minPrec) {\r
- while(it.hasNext()) {\r
- EBinaryRightSide right = it.next();\r
- SCLValue op = context.resolveValue(right.operator.name);\r
- if(op == null) {\r
- context.getErrorLog().log(right.operator, \r
- "Couldn't resolve variable " + right.operator.name + ".");\r
- return lhs;\r
- }\r
- Precedence opPrec = op.getPrecedence();\r
- if(minPrec.level > opPrec.level)\r
- break;\r
- Expression rhs = right.right;\r
- while(it.hasNext()) {\r
- EVar var = it.next().operator;\r
- SCLValue nextOp = context.resolveValue(var.name);\r
- if(nextOp == null) {\r
- context.getErrorLog().log(var, \r
- "Couldn't resolve variable " + var.name + ".");\r
- return lhs;\r
- }\r
- it.previous();\r
- Precedence nextPrec = nextOp.getPrecedence();\r
- int precDiff = opPrec.level - nextPrec.level;\r
- if(precDiff == 0) {\r
- if(opPrec.associativity == Associativity.LEFT)\r
- break;\r
- else if(opPrec.associativity == Associativity.NONASSOC) {\r
- context.getErrorLog().log(it.next().operator, "Nonassociative operator.");\r
- return lhs;\r
- }\r
- }\r
- else if(precDiff > 0)\r
- break;\r
- rhs = parse(context, rhs, it, nextPrec);\r
- }\r
- lhs = binary(lhs, op, right.operator, rhs);\r
- } \r
- return lhs;\r
- }\r
- */\r
- private Expression binary(Expression lhs, Expression op, EVar opAst, Expression rhs) {\r
- return new EApply(Locations.combine(lhs.location, rhs.location), op, lhs, rhs); \r
- }\r
- \r
- private Expression unary(SCLValue operator, EVar opAst, Expression expression) {\r
- EConstant op = new EConstant(opAst.location, operator);\r
- return new EApply(expression.location /*wrong*/, op, expression);\r
- }\r
- \r
- @Override\r
- public EVar getPatternHead() throws NotPatternException {\r
- if(rights.size() == 1)\r
- return rights.get(0).operator;\r
- else\r
- throw new NotPatternException(this);\r
- }\r
- \r
- @Override\r
- public LhsType getLhsType() throws NotPatternException {\r
- if(rights.size() == 1)\r
- return new FunctionDefinitionLhs(rights.get(0).operator.name);\r
- else\r
- throw new InternalCompilerError();\r
- }\r
- \r
- @Override\r
- public void getParameters(TranslationContext context,\r
- ArrayList<Expression> parameters) {\r
- parseOperators(context).getParameters(context, parameters);\r
- }\r
-\r
- public static Expression negate(EVar op, Expression expression) {\r
- if(expression instanceof EBinary) {\r
- ((EBinary)expression).negation = op;\r
- return expression;\r
- }\r
- /*else if(expression instanceof EIntegerLiteral) {\r
- EIntegerLiteral literal = (EIntegerLiteral)expression;\r
- literal.value = -literal.value;\r
- return expression;\r
- }*/\r
- else\r
- return new EBinary(expression, op);\r
- }\r
- \r
- @Override\r
- public int getFunctionDefinitionArity() throws NotPatternException {\r
- return 2;\r
- }\r
- \r
- @Override\r
- public void setLocationDeep(long loc) {\r
- if(location == Locations.NO_LOCATION) {\r
- location = loc;\r
- left.setLocationDeep(loc);\r
- if(negation != null)\r
- negation.setLocationDeep(loc);\r
- for(EBinaryRightSide right : rights)\r
- right.setLocationDeep(loc);\r
- }\r
- }\r
- \r
- @Override\r
- public Expression accept(ExpressionTransformer transformer) {\r
- return transformer.transform(this);\r
- }\r
-\r
-}\r
+package org.simantics.scl.compiler.elaboration.expressions;
+
+import java.util.ArrayList;
+
+import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
+import org.simantics.scl.compiler.common.names.Names;
+import org.simantics.scl.compiler.common.precedence.Associativity;
+import org.simantics.scl.compiler.common.precedence.Precedence;
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
+import org.simantics.scl.compiler.elaboration.errors.NotPatternException;
+import org.simantics.scl.compiler.elaboration.expressions.lhstype.FunctionDefinitionLhs;
+import org.simantics.scl.compiler.elaboration.expressions.lhstype.LhsType;
+import org.simantics.scl.compiler.elaboration.modules.SCLValue;
+import org.simantics.scl.compiler.errors.Locations;
+
+
+
+public class EBinary extends ASTExpression {
+ public static final int NEGATION_LEVEL = 6;
+
+ public Expression left;
+ public ArrayList<EBinaryRightSide> rights = new ArrayList<EBinaryRightSide>();
+ public EVar negation;
+
+ public EBinary(Expression left, EVar negation) {
+ this.left = left;
+ this.negation = negation;
+ }
+
+ private EBinary(Expression left, EVar operator, Expression right) {
+ this.left = left;
+ rights.add(new EBinaryRightSide(operator, right));
+ }
+
+ public static EBinary create(Expression left, EVar operator, Expression right) {
+ if(left instanceof EBinary) {
+ EBinary left_ = (EBinary)left;
+ left_.rights.add(new EBinaryRightSide(operator, right));
+ return left_;
+ }
+ else
+ return new EBinary(left, operator, right);
+ }
+
+ @Override
+ public Expression resolve(TranslationContext context) {
+ return parseOperators(context).resolve(context);
+ }
+
+ public Expression parseOperators(TranslationContext context) {
+ ArrayList<Expression> output = new ArrayList<Expression>();
+ ArrayList<Expression> ops = new ArrayList<Expression>();
+ ArrayList<EVar> opAsts = new ArrayList<EVar>();
+
+ EVar negation = this.negation;
+
+ output.add(left);
+ for(EBinaryRightSide right : rights) {
+ // Read op
+ Expression op = context.resolveExpression(right.operator.location, right.operator.name);
+ if(op == null)
+ return new EError(location);
+ Precedence opPrec = op.getPrecedence();
+ while(!ops.isEmpty()) {
+ Expression oldOp = ops.get(ops.size()-1);
+ Precedence oldOpPrecedence = oldOp.getPrecedence();
+
+ if(oldOpPrecedence.level < opPrec.level)
+ break;
+ if(oldOpPrecedence.level == opPrec.level) {
+ if(opPrec.associativity == Associativity.RIGHT)
+ break;
+ if(opPrec.associativity == Associativity.NONASSOC) {
+ context.getErrorLog().log(right.operator.location,
+ "Operator " + right.operator.name + " is not associative.");
+ return new EError(location);
+ }
+ }
+
+ // Pop op
+ ops.remove(ops.size()-1);
+ Expression r = output.remove(output.size()-1);
+ Expression l = output.remove(output.size()-1);
+ output.add(binary(l, oldOp, opAsts.remove(opAsts.size()-1), r));
+ }
+ if(negation != null && ops.isEmpty()) {
+ if(opPrec.level <= NEGATION_LEVEL) {
+ SCLValue neg = context.getEnvironment().getValue(Names.Prelude_neg);
+ if(neg == null) {
+ context.getErrorLog().log(location,
+ "Couldn't resolve variable neg.");
+ return new EError(location);
+ }
+ output.set(0, unary(neg, negation, output.get(0)));
+ negation = null;
+ }
+ }
+ ops.add(op);
+ opAsts.add(right.operator);
+
+ // Read value
+ output.add(right.right);
+ }
+
+ // Pop rest
+ while(!ops.isEmpty()) {
+ Expression oldOp = ops.remove(ops.size()-1);
+ Expression r = output.remove(output.size()-1);
+ Expression l = output.remove(output.size()-1);
+ output.add(binary(l, oldOp, opAsts.remove(opAsts.size()-1), r));
+ }
+ if(negation != null) {
+ SCLValue neg = context.getEnvironment().getValue(Names.Prelude_neg);
+ if(neg == null) {
+ context.getErrorLog().log(location,
+ "Couldn't resolve variable neg.");
+ return new EError(location);
+ }
+ output.set(0, unary(neg, negation, output.get(0)));
+ }
+
+ return output.get(0);
+
+ //System.out.println("parseOperators: " + this);
+ //return parse(context, left, rights.listIterator(), new Precedence(-1, Associativity.NONASSOC));
+ }
+
+ /*
+ private Expression parse(TranslationContext context,
+ Expression lhs, ListIterator<EBinaryRightSide> it, Precedence minPrec) {
+ while(it.hasNext()) {
+ EBinaryRightSide right = it.next();
+ SCLValue op = context.resolveValue(right.operator.name);
+ if(op == null) {
+ context.getErrorLog().log(right.operator,
+ "Couldn't resolve variable " + right.operator.name + ".");
+ return lhs;
+ }
+ Precedence opPrec = op.getPrecedence();
+ if(minPrec.level > opPrec.level)
+ break;
+ Expression rhs = right.right;
+ while(it.hasNext()) {
+ EVar var = it.next().operator;
+ SCLValue nextOp = context.resolveValue(var.name);
+ if(nextOp == null) {
+ context.getErrorLog().log(var,
+ "Couldn't resolve variable " + var.name + ".");
+ return lhs;
+ }
+ it.previous();
+ Precedence nextPrec = nextOp.getPrecedence();
+ int precDiff = opPrec.level - nextPrec.level;
+ if(precDiff == 0) {
+ if(opPrec.associativity == Associativity.LEFT)
+ break;
+ else if(opPrec.associativity == Associativity.NONASSOC) {
+ context.getErrorLog().log(it.next().operator, "Nonassociative operator.");
+ return lhs;
+ }
+ }
+ else if(precDiff > 0)
+ break;
+ rhs = parse(context, rhs, it, nextPrec);
+ }
+ lhs = binary(lhs, op, right.operator, rhs);
+ }
+ return lhs;
+ }
+ */
+ private Expression binary(Expression lhs, Expression op, EVar opAst, Expression rhs) {
+ return new EApply(Locations.combine(lhs.location, rhs.location), op, lhs, rhs);
+ }
+
+ private Expression unary(SCLValue operator, EVar opAst, Expression expression) {
+ EConstant op = new EConstant(opAst.location, operator);
+ return new EApply(expression.location /*wrong*/, op, expression);
+ }
+
+ @Override
+ public EVar getPatternHead() throws NotPatternException {
+ if(rights.size() == 1)
+ return rights.get(0).operator;
+ else
+ throw new NotPatternException(this);
+ }
+
+ @Override
+ public LhsType getLhsType() throws NotPatternException {
+ if(rights.size() == 1)
+ return new FunctionDefinitionLhs(rights.get(0).operator.name);
+ else
+ throw new InternalCompilerError();
+ }
+
+ @Override
+ public void getParameters(TranslationContext context,
+ ArrayList<Expression> parameters) {
+ parseOperators(context).getParameters(context, parameters);
+ }
+
+ public static Expression negate(EVar op, Expression expression) {
+ if(expression instanceof EBinary) {
+ ((EBinary)expression).negation = op;
+ return expression;
+ }
+ /*else if(expression instanceof EIntegerLiteral) {
+ EIntegerLiteral literal = (EIntegerLiteral)expression;
+ literal.value = -literal.value;
+ return expression;
+ }*/
+ else
+ return new EBinary(expression, op);
+ }
+
+ @Override
+ public int getFunctionDefinitionPatternArity() throws NotPatternException {
+ return 2;
+ }
+
+ @Override
+ public void setLocationDeep(long loc) {
+ if(location == Locations.NO_LOCATION) {
+ location = loc;
+ left.setLocationDeep(loc);
+ if(negation != null)
+ negation.setLocationDeep(loc);
+ for(EBinaryRightSide right : rights)
+ right.setLocationDeep(loc);
+ }
+ }
+
+ @Override
+ public Expression accept(ExpressionTransformer transformer) {
+ return transformer.transform(this);
+ }
+
+}
Code Review / simantics / platform.git / blobdiff