// buildBooleanBinaryExpression builds the CodeDOM for a boolean unary operator.
func (db *domBuilder) buildBooleanBinaryExpression(node compilergraph.GraphNode, op string) codedom.Expression {
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
leftExpr := codedom.NominalUnwrapping(db.getExpression(node, parser.NodeBinaryExpressionLeftExpr), boolType, node)
rightExpr := codedom.NominalUnwrapping(db.getExpression(node, parser.NodeBinaryExpressionRightExpr), boolType, node)
return codedom.NominalWrapping(
codedom.BinaryOperation(leftExpr, op, rightExpr, node),
db.scopegraph.TypeGraph().BoolType(),
node)
}
// buildIsComparisonExpression builds the CodeDOM for an is comparison operator.
func (db *domBuilder) buildIsComparisonExpression(node compilergraph.GraphNode) codedom.Expression {
generatedLeftExpr := db.getExpression(node, parser.NodeBinaryExpressionLeftExpr)
// Check for a `not` subexpression. If found, we invert the check.
op := "=="
rightExpr := node.GetNode(parser.NodeBinaryExpressionRightExpr)
if rightExpr.Kind() == parser.NodeKeywordNotExpression {
op = "!="
rightExpr = rightExpr.GetNode(parser.NodeUnaryExpressionChildExpr)
}
generatedRightExpr := db.buildExpression(rightExpr)
return codedom.NominalWrapping(
codedom.BinaryOperation(generatedLeftExpr, op, generatedRightExpr, node),
db.scopegraph.TypeGraph().BoolType(),
node)
}
// buildExpression builds the CodeDOM for the given SRG node and returns it as an expression. Will
// panic if the returned DOM type is not an expression.
func (db *domBuilder) buildExpression(node compilergraph.GraphNode) codedom.Expression {
switch node.Kind() {
// Access Expressions.
case parser.NodeMemberAccessExpression:
fallthrough
case parser.NodeNullableMemberAccessExpression:
fallthrough
case parser.NodeDynamicMemberAccessExpression:
return db.buildMemberAccessExpression(node)
case parser.NodeTypeIdentifierExpression:
return db.buildIdentifierExpression(node)
case parser.NodeGenericSpecifierExpression:
return db.buildGenericSpecifierExpression(node)
case parser.NodeCastExpression:
return db.buildCastExpression(node)
case parser.NodeStreamMemberAccessExpression:
return db.buildStreamMemberAccessExpression(node)
// Await Expression.
case parser.NodeTypeAwaitExpression:
return db.buildAwaitExpression(node)
// Lambda Expressions.
case parser.NodeTypeLambdaExpression:
return db.buildLambdaExpression(node)
// SML Expressions.
case parser.NodeTypeSmlExpression:
return db.buildSmlExpression(node)
case parser.NodeTypeSmlText:
return db.buildSmlText(node)
// Flow Expressions.
case parser.NodeTypeConditionalExpression:
return db.buildConditionalExpression(node)
case parser.NodeTypeLoopExpression:
return db.buildLoopExpression(node)
// Op Expressions.
case parser.NodeRootTypeExpression:
return db.buildRootTypeExpression(node)
case parser.NodeFunctionCallExpression:
return db.buildFunctionCall(node)
case parser.NodeSliceExpression:
return db.buildSliceExpression(node)
case parser.NodeNullComparisonExpression:
return db.buildNullComparisonExpression(node)
case parser.NodeAssertNotNullExpression:
return db.buildAssertNotNullExpression(node)
case parser.NodeIsComparisonExpression:
return db.buildIsComparisonExpression(node)
case parser.NodeInCollectionExpression:
return db.buildInCollectionExpression(node)
case parser.NodeBitwiseNotExpression:
return db.buildUnaryOperatorExpression(node, nil)
case parser.NodeKeywordNotExpression:
return db.buildUnaryOperatorExpression(node, func(expr codedom.Expression) codedom.Expression {
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
childExpr := codedom.UnaryOperation("!", codedom.NominalUnwrapping(expr, boolType, node), node)
return codedom.NominalWrapping(
childExpr,
db.scopegraph.TypeGraph().BoolType(),
node)
})
case parser.NodeDefineRangeExpression:
fallthrough
case parser.NodeBitwiseXorExpression:
fallthrough
case parser.NodeBitwiseOrExpression:
fallthrough
case parser.NodeBitwiseAndExpression:
fallthrough
case parser.NodeBitwiseShiftLeftExpression:
fallthrough
case parser.NodeBitwiseShiftRightExpression:
fallthrough
case parser.NodeBinaryAddExpression:
fallthrough
case parser.NodeBinarySubtractExpression:
fallthrough
case parser.NodeBinaryMultiplyExpression:
fallthrough
case parser.NodeBinaryDivideExpression:
fallthrough
case parser.NodeBinaryModuloExpression:
return db.buildBinaryOperatorExpression(node, nil)
case parser.NodeComparisonEqualsExpression:
return db.buildBinaryOperatorExpression(node, nil)
case parser.NodeComparisonNotEqualsExpression:
return db.buildBinaryOperatorExpression(node, func(expr codedom.Expression) codedom.Expression {
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
childExpr := codedom.UnaryOperation("!", codedom.NominalUnwrapping(expr, boolType, node), node)
return codedom.NominalRefWrapping(
childExpr,
boolType.NominalDataType(),
boolType,
node)
})
case parser.NodeComparisonLTEExpression:
return db.buildBinaryOperatorExpression(node, func(expr codedom.Expression) codedom.Expression {
intType := db.scopegraph.TypeGraph().IntTypeReference()
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
childExpr := codedom.BinaryOperation(codedom.NominalUnwrapping(expr, intType, node), "<=", codedom.LiteralValue("0", node), node)
return codedom.NominalRefWrapping(
childExpr,
boolType.NominalDataType(),
boolType,
node)
})
case parser.NodeComparisonLTExpression:
return db.buildBinaryOperatorExpression(node, func(expr codedom.Expression) codedom.Expression {
intType := db.scopegraph.TypeGraph().IntTypeReference()
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
childExpr := codedom.BinaryOperation(codedom.NominalUnwrapping(expr, intType, node), "<", codedom.LiteralValue("0", node), node)
return codedom.NominalRefWrapping(
childExpr,
boolType.NominalDataType(),
boolType,
node)
})
case parser.NodeComparisonGTEExpression:
return db.buildBinaryOperatorExpression(node, func(expr codedom.Expression) codedom.Expression {
intType := db.scopegraph.TypeGraph().IntTypeReference()
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
childExpr := codedom.BinaryOperation(codedom.NominalUnwrapping(expr, intType, node), ">=", codedom.LiteralValue("0", node), node)
return codedom.NominalRefWrapping(
childExpr,
boolType.NominalDataType(),
boolType,
node)
})
case parser.NodeComparisonGTExpression:
return db.buildBinaryOperatorExpression(node, func(expr codedom.Expression) codedom.Expression {
intType := db.scopegraph.TypeGraph().IntTypeReference()
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
childExpr := codedom.BinaryOperation(codedom.NominalUnwrapping(expr, intType, node), ">", codedom.LiteralValue("0", node), node)
return codedom.NominalRefWrapping(
childExpr,
boolType.NominalDataType(),
boolType,
node)
})
// Boolean operators.
case parser.NodeBooleanAndExpression:
return db.buildBooleanBinaryExpression(node, "&&")
case parser.NodeBooleanOrExpression:
return db.buildBooleanBinaryExpression(node, "||")
case parser.NodeBooleanNotExpression:
return db.buildBooleanUnaryExpression(node, "!")
// Literals.
case parser.NodeStructuralNewExpression:
return db.buildStructuralNewExpression(node)
case parser.NodeNumericLiteralExpression:
return db.buildNumericLiteral(node)
case parser.NodeBooleanLiteralExpression:
return db.buildBooleanLiteral(node)
case parser.NodeStringLiteralExpression:
return db.buildStringLiteral(node)
case parser.NodeNullLiteralExpression:
return db.buildNullLiteral(node)
case parser.NodeThisLiteralExpression:
return db.buildThisLiteral(node)
case parser.NodeValLiteralExpression:
return db.buildValLiteral(node)
case parser.NodeListExpression:
return db.buildListExpression(node)
case parser.NodeSliceLiteralExpression:
return db.buildSliceLiteralExpression(node)
case parser.NodeMappingLiteralExpression:
return db.buildMappingLiteralExpression(node)
case parser.NodeMapExpression:
return db.buildMapExpression(node)
case parser.NodeTypeTemplateString:
return db.buildTemplateStringExpression(node)
case parser.NodeTaggedTemplateLiteralString:
return db.buildTaggedTemplateString(node)
default:
panic(fmt.Sprintf("Unknown SRG expression node: %s", node.Kind()))
return nil
}
}
func (db *domBuilder) buildOptimizedBinaryOperatorExpression(node compilergraph.GraphNode, parentType typegraph.TypeReference, leftExpr codedom.Expression, rightExpr codedom.Expression) (codedom.Expression, bool) {
// Verify this is a supported native operator.
opString, hasOp := operatorMap[node.Kind()]
if !hasOp {
return nil, false
}
// Verify we have a native binary operator we can optimize.
if !parentType.IsNominal() {
return nil, false
}
isNumeric := false
switch {
case parentType.IsDirectReferenceTo(db.scopegraph.TypeGraph().IntType()):
isNumeric = true
case parentType.IsDirectReferenceTo(db.scopegraph.TypeGraph().BoolType()):
fallthrough
case parentType.IsDirectReferenceTo(db.scopegraph.TypeGraph().StringType()):
fallthrough
default:
return nil, false
}
// Handle the various kinds of operators.
switch node.Kind() {
case parser.NodeComparisonEqualsExpression:
fallthrough
case parser.NodeComparisonNotEqualsExpression:
// Always allowed.
break
case parser.NodeComparisonLTEExpression:
fallthrough
case parser.NodeComparisonLTExpression:
fallthrough
case parser.NodeComparisonGTEExpression:
fallthrough
case parser.NodeComparisonGTExpression:
// Only allowed for number.
if !isNumeric {
return nil, false
}
}
boolType := db.scopegraph.TypeGraph().BoolTypeReference()
unwrappedLeftExpr := codedom.NominalUnwrapping(leftExpr, parentType, node)
unwrappedRightExpr := codedom.NominalUnwrapping(rightExpr, parentType, node)
compareExpr := codedom.BinaryOperation(unwrappedLeftExpr, opString, unwrappedRightExpr, node)
return codedom.NominalRefWrapping(compareExpr,
boolType.NominalDataType(),
boolType,
node), true
}
// buildNativeBinaryExpression builds the CodeDOM for a native unary operator.
func (db *domBuilder) buildNativeBinaryExpression(node compilergraph.GraphNode, op string) codedom.Expression {
leftExpr := db.getExpression(node, parser.NodeBinaryExpressionLeftExpr)
rightExpr := db.getExpression(node, parser.NodeBinaryExpressionRightExpr)
return codedom.BinaryOperation(leftExpr, op, rightExpr, node)
}
// buildNullComparisonExpression builds the CodeDOM for a null comparison (??) operator.
func (db *domBuilder) buildNullComparisonExpression(node compilergraph.GraphNode) codedom.Expression {
leftExpr := db.getExpression(node, parser.NodeBinaryExpressionLeftExpr)
rightExpr := db.getExpression(node, parser.NodeBinaryExpressionRightExpr)
return codedom.BinaryOperation(leftExpr, "??", rightExpr, node)
}