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postprocessor.go
239 lines (203 loc) · 5.28 KB
/
postprocessor.go
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package parser
import (
"errors"
)
func postProcess(parsed *Up) error {
if parsed == nil {
return errors.New("root node was nil")
}
if parsed.NamespaceDeclarations != nil {
for _, declaration := range parsed.NamespaceDeclarations {
err := postProcessNamespaceDecl(declaration)
if err != nil {
return err
}
}
}
return nil
}
func postProcessNamespaceDecl(decl *NamespaceDeclaration) error {
if decl == nil {
return errors.New("namespace declaration was nil")
}
if decl.Name == nil {
return errors.New("namespace name was nil")
}
if len(decl.Name.NamespaceParts) == 0 {
return errors.New("namespace name was empty")
}
if decl.Members != nil {
for _, member := range decl.Members {
if member == nil || (member.Class == nil && member.Enum == nil) {
return errors.New("member was nil")
}
if member.Class == nil { // must be enum
err := postProcessEnum(member.Enum)
if err != nil {
return err
}
} else { // must be class
err := postProcessClass(member.Class)
if err != nil {
return err
}
}
}
}
return nil
}
func postProcessEnum(enum *Enum) error {
if enum == nil {
return errors.New("enum was nil")
}
if enum.Name == "" {
return errors.New("enum name was empty")
}
for _, opt := range enum.Options {
if opt == "" {
return errors.New("enum option was empty")
}
}
return nil
}
func postProcessClass(class *Class) error {
if class == nil {
return errors.New("class was nil")
}
if class.Name == "" {
return errors.New("class name was empty")
}
for _, member := range class.Members {
if member.Name == "" {
return errors.New("class member name was empty")
}
if member.Type == nil {
return errors.New("class member type was nil")
}
if member.Type.Name == "" {
return errors.New("class member type was empty")
}
if member.MethodBody == nil && member.Type.IsVoid {
return errors.New("non-method class member had void as its type")
}
if member.MethodBody == nil && member.Parameters != nil {
return errors.New("method \"" + member.Name + "\" was missing a body")
}
if member.Parameters != nil {
for _, param := range member.Parameters {
if param.Name == "" {
return errors.New("method parameter had empty name")
}
if param.Type == nil {
return errors.New("method parameter type was nil")
}
if param.Type.Name == "" {
return errors.New("method parameter type was empty")
}
if param.Type.IsVoid {
return errors.New("method parameter had void as its type")
}
}
}
if member.MethodBody != nil {
for _, statement := range member.MethodBody {
err := postProcessStatement(statement)
if err != nil {
return err
}
}
}
}
return nil
}
func postProcessExpression(expr *Expression) error {
if expr == nil {
return errors.New("expression was nil")
}
if expr.Parts == nil {
return errors.New("expression was nil")
}
for _, part := range expr.Parts {
err := postProcessExpressionPart(part)
if err != nil {
return err
}
}
return nil
}
func postProcessExpressionPart(exprPart *ExpressionPart) error {
if exprPart == nil {
return errors.New("expression part was nil")
}
if exprPart.Literal == nil && exprPart.ObjAccess == nil && exprPart.Parenthesis == nil && exprPart.Operator == nil &&
exprPart.Call == nil && exprPart.Construction == nil {
return errors.New("expression part was nil")
}
if exprPart.Literal != nil {
if exprPart.Literal.Array != nil {
if exprPart.Literal.Array.Type == nil {
return errors.New("array literal type was nil")
}
if exprPart.Literal.Array.Type.Name == "" {
return errors.New("array literal type was empty")
}
if exprPart.Literal.Array.Type.IsVoid {
return errors.New("array literal had void as its type")
}
}
if exprPart.Literal.String != nil {
trimmed := (*exprPart.Literal.String)[1 : len(*exprPart.Literal.String)-1]
exprPart.Literal.String = &trimmed
}
if exprPart.Literal.Char != nil {
trimmed := (*exprPart.Literal.Char)[1:2]
exprPart.Literal.Char = &trimmed
}
} else if exprPart.Call != nil {
if exprPart.Call.Name == nil {
return errors.New("called method name was nil")
}
if exprPart.Call.Name.Name == "" {
return errors.New("called method name was empty")
}
if exprPart.Call.Params != nil {
for _, param := range exprPart.Call.Params {
err := postProcessExpression(param)
if err != nil {
return err
}
}
}
} else if exprPart.Construction != nil {
if exprPart.Construction.Type == nil {
return errors.New("constructor call type was nil")
}
if exprPart.Construction.Type.Name == "" {
return errors.New("constructor call type was empty")
}
if exprPart.Construction.Type.IsVoid {
return errors.New("constructor call had void as its type")
}
if exprPart.Construction.Params != nil {
for _, param := range exprPart.Construction.Params {
err := postProcessExpression(param)
if err != nil {
return err
}
}
}
} else if exprPart.Parenthesis != nil {
// recursion!
err := postProcessExpression(exprPart.Parenthesis)
if err != nil {
return err
}
} else if exprPart.Operator != nil {
// meh
} else if exprPart.ObjAccess != nil {
if exprPart.ObjAccess.Name == "" {
return errors.New("accessed object name was empty")
}
}
return nil
}