// can't re-use the legacy native function resolver because it's a method of a
// type that provides its own helpers and contextual data, all of which would
// be too hard to reproduce
func (pkgr *Packager) resolveNativeDeclaration(f *tp.Function, path string) {
// first we should check that the signature refers to something that actually exists
sigStr := strings.Replace(f.Stub(pkgr.Package), ",", ".", -1)
if whale.LookupBuiltIn(sigStr) == nil {
panic(fmt.Sprintf("attempt to provide signature for nonexistent native function `%s` in `%s`", sigStr, path))
}
// now turn the type names into the appropriate numeric ids
if returnType := f.GetReturnType(); len(returnType) > 0 {
f.ReturnTypeId = proto.Int32(int32(pkgr.TypeMap[returnType]))
f.ReturnType = nil
}
if scopeType := f.GetScopeType(); len(scopeType) > 0 {
f.ScopeTypeId = proto.Int32(int32(pkgr.TypeMap[scopeType]))
f.ScopeType = nil
}
if opensType := f.GetOpensType(); len(opensType) > 0 {
f.OpensTypeId = proto.Int32(int32(pkgr.TypeMap[opensType]))
f.OpensType = nil
}
for _, arg := range f.Args {
if typeName := arg.GetTypeString(); len(typeName) > 0 {
arg.TypeId = proto.Int32(int32(pkgr.TypeMap[typeName]))
arg.TypeString = nil
}
}
}
func (pkg *Package) resolveHeader(function *tp.Function) {
returnType := null.GetString(function.ReturnType)
if len(returnType) > 0 {
function.ReturnTypeId = proto.Int32(int32(pkg.findTypeIndex(returnType)))
function.ReturnType = nil
}
scopeType := null.GetString(function.ScopeType)
if len(scopeType) > 0 {
function.ScopeTypeId = proto.Int32(int32(pkg.findTypeIndex(scopeType)))
function.ScopeType = nil
}
opensType := null.GetString(function.OpensType)
if len(opensType) > 0 {
function.OpensTypeId = proto.Int32(int32(pkg.findTypeIndex(opensType)))
function.OpensType = nil
}
for _, arg := range function.Args {
typeName := null.GetString(arg.TypeString)
if len(typeName) > 0 {
arg.TypeId = proto.Int32(int32(pkg.findTypeIndex(typeName)))
arg.TypeString = nil
}
}
}
func (p *Parser) definition() *tp.Function {
isSignature := false
node := new(tp.Function)
// functions should be injected only into the first specified namespace
node.Namespace = proto.String(p.Defspace)
funcLineNo := p.pop().LineNumber // pop the `@func` keyword
contextType := ""
if p.peek().Lexeme == TYPE {
contextType = p.pop().Value
if p.peek().Lexeme != DOT {
p.error("function context and function name must be separated by '.'")
}
p.pop() // pop the dot
}
if p.peek().Lexeme != ID {
p.error("invalid function name in definition")
}
funcName := p.pop().Value
funcFile := ""
if len(p.ScriptPath) > 0 && p.ScriptPath != "." {
funcFile = filepath.Join(p.ScriptPath, p.FileName)
}
if p.peek().Lexeme != LPAREN {
p.error("parenthesized parameter list expected in function declaration")
}
p.pop() // pop the lparen
params := p.parameters(funcName)
if len(params) == 0 {
params = nil
}
p.pop() // pop the rparen
returnType := ""
opensType := ""
if p.peek().Lexeme == TYPE {
isSignature = true
returnType = p.pop().Value
if p.peek().Lexeme == TYPE {
opensType = p.pop().Value
}
}
node.Name = proto.String(funcName)
if len(funcFile) > 0 {
node.Filename = proto.String(funcFile)
}
node.LineNumber = proto.Int32(funcLineNo)
node.Args = params
node.ScopeType = proto.String(contextType)
node.ReturnType = proto.String(returnType)
node.OpensType = proto.String(opensType)
if isSignature {
if p.peek().Lexeme == LBRACE {
p.error("body not permitted in signature for built-in " + funcName)
}
node.BuiltIn = proto.Bool(true)
return node
}
node.BuiltIn = proto.Bool(false)
if p.peek().Lexeme != LBRACE {
p.error("definition for " + funcName + " is missing a body")
}
funcBody := &tp.Instruction{
Type: proto.Int32(constants.Instruction_BLOCK),
// Children: p.block(),
// use the wrapper to get a better error message
Children: p.function_body(*node.Name),
}
node.Instruction = funcBody
return node
}