// buildMapExpression builds the CodeDOM for a map expression.
func (db *domBuilder) buildMapExpression(node compilergraph.GraphNode) codedom.Expression {
mapScope, _ := db.scopegraph.GetScope(node)
mapType := mapScope.ResolvedTypeRef(db.scopegraph.TypeGraph())
eit := node.StartQuery().
Out(parser.NodeMapExpressionChildEntry).
BuildNodeIterator()
var keyExprs = make([]codedom.Expression, 0)
var valueExprs = make([]codedom.Expression, 0)
for eit.Next() {
entryNode := eit.Node()
keyExprs = append(keyExprs, db.getExpression(entryNode, parser.NodeMapExpressionEntryKey))
valueExprs = append(valueExprs, db.getExpression(entryNode, parser.NodeMapExpressionEntryValue))
}
if len(valueExprs) == 0 {
// Empty map. Call the new() constructor directly.
constructor, _ := mapType.ResolveMember("new", typegraph.MemberResolutionStatic)
return codedom.MemberCall(
codedom.MemberReference(codedom.TypeLiteral(mapType, node), constructor, node),
constructor,
[]codedom.Expression{},
node)
}
constructor, _ := mapType.ResolveMember("forArrays", typegraph.MemberResolutionStatic)
return codedom.MemberCall(
codedom.MemberReference(codedom.TypeLiteral(mapType, node), constructor, node),
constructor,
[]codedom.Expression{codedom.ArrayLiteral(keyExprs, node), codedom.ArrayLiteral(valueExprs, node)},
node)
}
// buildTemplateStringCall builds the CodeDOM representing the call to a template string function.
func (db *domBuilder) buildTemplateStringCall(node compilergraph.GraphNode, funcExpr codedom.Expression, isTagged bool) codedom.Expression {
pit := node.StartQuery().
Out(parser.NodeTemplateStringPiece).
BuildNodeIterator()
var pieceExprs = make([]codedom.Expression, 0)
var valueExprs = make([]codedom.Expression, 0)
var isPiece = true
for pit.Next() {
if isPiece {
pieceExprs = append(pieceExprs, db.buildExpression(pit.Node()))
} else {
valueExprs = append(valueExprs, db.buildExpression(pit.Node()))
}
isPiece = !isPiece
}
// Handle common case: No literal string piece at all.
if len(pieceExprs) == 0 {
return codedom.NominalWrapping(codedom.LiteralValue("''", node), db.scopegraph.TypeGraph().StringType(), node)
}
// Handle common case: A single literal string piece with no values.
if len(pieceExprs) == 1 && len(valueExprs) == 0 {
return pieceExprs[0]
}
pieceSliceType := db.scopegraph.TypeGraph().SliceTypeReference(db.scopegraph.TypeGraph().StringTypeReference())
valueSliceType := db.scopegraph.TypeGraph().SliceTypeReference(db.scopegraph.TypeGraph().StringableTypeReference())
constructor, _ := pieceSliceType.ResolveMember("overArray", typegraph.MemberResolutionStatic)
pieceSliceExpr := codedom.MemberCall(
codedom.MemberReference(
codedom.TypeLiteral(pieceSliceType, node), constructor, node),
constructor,
[]codedom.Expression{codedom.ArrayLiteral(pieceExprs, node)},
node)
valueSliceExpr := codedom.MemberCall(
codedom.MemberReference(
codedom.TypeLiteral(valueSliceType, node), constructor, node),
constructor,
[]codedom.Expression{codedom.ArrayLiteral(valueExprs, node)},
node)
return codedom.AwaitPromise(codedom.FunctionCall(funcExpr, []codedom.Expression{pieceSliceExpr, valueSliceExpr}, node), node)
}
// buildCollectionInitializerExpression builds a literal collection expression.
func (db *domBuilder) buildCollectionInitializerExpression(collectionType typegraph.TypeReference, valueExprs []codedom.Expression, emptyConstructorName string, arrayConstructorName string, node compilergraph.GraphNode) codedom.Expression {
if len(valueExprs) == 0 {
// Empty collection. Call the empty constructor directly.
constructor, _ := collectionType.ResolveMember(emptyConstructorName, typegraph.MemberResolutionStatic)
return codedom.MemberCall(
codedom.MemberReference(codedom.TypeLiteral(collectionType, node), constructor, node),
constructor,
[]codedom.Expression{},
node)
}
arrayExpr := codedom.ArrayLiteral(valueExprs, node)
constructor, _ := collectionType.ResolveMember(arrayConstructorName, typegraph.MemberResolutionStatic)
return codedom.MemberCall(
codedom.MemberReference(codedom.TypeLiteral(collectionType, node), constructor, node),
constructor,
[]codedom.Expression{arrayExpr},
node)
}
// generateMemberCall generates the expression source for a call to a module or type member.
func (eg *expressionGenerator) generateMemberCall(memberCall *codedom.MemberCallNode, context generationContext) esbuilder.ExpressionBuilder {
if memberCall.Member.IsOperator() && memberCall.Member.IsNative() {
// This is a call to a native operator.
if memberCall.Member.Name() != "index" {
panic("Native call to non-index operator")
}
refExpr := memberCall.ChildExpression.(*codedom.MemberReferenceNode).ChildExpression
return eg.generateExpression(codedom.NativeIndexing(refExpr, memberCall.Arguments[0], memberCall.BasisNode()), context)
}
callPath := memberCall.ChildExpression
arguments := memberCall.Arguments
var functionCall = codedom.FunctionCall(callPath, arguments, memberCall.BasisNode())
if memberCall.Nullable {
// Invoke the function with a specialized nullable-invoke.
refExpr := callPath.(*codedom.DynamicAccessNode).ChildExpression
var isPromising = "false"
if memberCall.Member.IsPromising() {
isPromising = "true"
}
localArguments := []codedom.Expression{
refExpr,
codedom.LiteralValue("'"+memberCall.Member.Name()+"'", refExpr.BasisNode()),
codedom.LiteralValue(isPromising, memberCall.BasisNode()),
codedom.ArrayLiteral(arguments, memberCall.BasisNode()),
}
functionCall = codedom.RuntimeFunctionCall(codedom.NullableInvokeFunction, localArguments, memberCall.BasisNode())
}
return eg.generateExpression(codedom.WrapIfPromising(functionCall, memberCall.Member, memberCall.BasisNode()), context)
}