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
}