// appendSigReference appends the given type reference to the given signature code
// buffer, returning true if any portion is dynamic.
func appendSigReference(typeRef typegraph.TypeReference, buf *bytes.Buffer) bool {
if typeRef.IsAny() {
buf.WriteString("any")
return false
}
if typeRef.IsStruct() {
buf.WriteString("struct")
return false
}
if typeRef.IsNull() {
buf.WriteString("null")
return false
}
if typeRef.IsVoid() {
buf.WriteString("void")
return false
}
referredType := typeRef.ReferredType()
if referredType.TypeKind() == typegraph.GenericType {
buf.WriteString("\" + $t.typeid(")
buf.WriteString(referredType.Name())
buf.WriteString(") + \"")
return true
}
// Add the type's unique ID.
buf.WriteString(referredType.GlobalUniqueId())
// If there are no generics, then we're done.
if !typeRef.HasGenerics() {
return false
}
// Otherwise, append the generics.
buf.WriteRune('<')
var dynamic = false
for index, generic := range typeRef.Generics() {
if index > 0 {
buf.WriteRune(',')
}
genericDynamic := appendSigReference(generic, buf)
dynamic = dynamic || genericDynamic
}
buf.WriteRune('>')
return dynamic
}
// scopeReturnStatement scopes a return statement in the SRG.
func (sb *scopeBuilder) scopeReturnStatement(node compilergraph.GraphNode, context scopeContext) proto.ScopeInfo {
var actualReturnType typegraph.TypeReference = sb.sg.tdg.VoidTypeReference()
exprNode, found := node.TryGetNode(parser.NodeReturnStatementValue)
if found {
exprScope := sb.getScope(exprNode, context)
if !exprScope.GetIsValid() {
return newScope().
Invalid().
GetScope()
}
actualReturnType = exprScope.ResolvedTypeRef(sb.sg.tdg)
}
// Ensure the return types match.
expectedReturnType, _ := sb.sg.tdg.LookupReturnType(context.parentImplemented)
if expectedReturnType.IsVoid() {
if !actualReturnType.IsVoid() {
sb.decorateWithError(node, "No return value expected here, found value of type '%v'", actualReturnType)
return newScope().
Invalid().
Returning(actualReturnType, true).
GetScope()
}
} else if actualReturnType.IsVoid() {
sb.decorateWithError(node, "Expected non-void resolved value")
return newScope().
Invalid().
Returning(actualReturnType, true).
GetScope()
} else {
if serr := actualReturnType.CheckSubTypeOf(expectedReturnType); serr != nil {
sb.decorateWithError(node, "Expected return value of type '%v': %v", expectedReturnType, serr)
return newScope().
Invalid().
Returning(actualReturnType, true).
GetScope()
}
}
return newScope().
IsTerminatingStatement().
Valid().
Returning(actualReturnType, true).
GetScope()
}
// TypeReferenceCall returns source for retrieving an object reference to the type defined by the given
// type reference.
func (p Pather) TypeReferenceCall(typeRef typegraph.TypeReference) string {
if typeRef.IsAny() {
return "$t.any"
}
if typeRef.IsStruct() {
return "$t.struct"
}
if typeRef.IsNull() {
return "$t.null"
}
if typeRef.IsVoid() {
return "$t.void"
}
referredType := typeRef.ReferredType()
if referredType.TypeKind() == typegraph.GenericType {
return referredType.Name()
}
// Add the type name.
typePath := p.GetTypePath(referredType)
// If there are no generics, then simply return the type path.
if !typeRef.HasGenerics() {
return typePath
}
// Invoke the type with generics (if any).
var genericsString = "("
for index, generic := range typeRef.Generics() {
if index > 0 {
genericsString = genericsString + ", "
}
genericsString = genericsString + p.TypeReferenceCall(generic)
}
genericsString = genericsString + ")"
return typePath + genericsString
}