func (fs LambdaStatement) Parse(block string, lineNum int, nextBlockScanner *parser.ScanPeeker, factory *StatementFactory) (Statement, parser.SyntaxError) {
lines := parser.Lines(block)
factory = fetchNewFactory(factory)
typeDef, err, rest := expressionParsing.ParseTypeDef(lines[0])
if err != nil {
return nil, parser.NewSyntaxError(err.Error(), lineNum, 0)
}
var ftd expressionParsing.FuncTypeDefinition
var ok bool
if ftd, ok = typeDef.(expressionParsing.FuncTypeDefinition); !ok {
return nil, nil
}
var codeBlock []string
if len(strings.TrimSpace(rest)) > 0 {
var first string
if len(lines) > 1 {
return nil, parser.NewSyntaxError("Inline lambdas can only be one line", lineNum, 0)
} else if first, rest = parser.Tokenize(rest); first != "->" {
return nil, parser.NewSyntaxError("Misplaced tokens: "+rest, lineNum, 0)
}
codeBlock = []string{rest}
} else {
codeBlock = parser.RemoveTabs(lines[1:])
}
innerStatements, synErr := fetchInnerStatements(codeBlock, factory, lineNum+1)
if synErr != nil {
return nil, synErr
}
synErr = verifyInnerStatements(innerStatements, lineNum)
if synErr != nil {
return nil, synErr
}
return newLambdaStatement(lineNum, ftd, innerStatements, fs.packageLevel, fs.name), nil
}
func (ds LetStatement) Parse(block string, lineNum int, nextBlockScanner *parser.ScanPeeker, factory *StatementFactory) (Statement, parser.SyntaxError) {
lines := parser.Lines(block)
ok, varName, restOfLine := splitEquals(lines[0])
if ok {
if ds.packageLevel {
factory = adjustFactory(varName, factory)
}
combinedLine := parser.FromLines(append([]string{restOfLine}, lines[1:]...))
peeker := parser.NewScanPeekerStr(combinedLine, lineNum)
st, err := factory.Read(peeker)
if err != nil {
return nil, err
}
return newLetStatement(varName, combinedLine, lineNum, st), nil
}
if ds.packageLevel {
return nil, parser.NewSyntaxError(fmt.Sprintf("Unknown statement: %s", lines[0]), lineNum, 0)
} else {
return nil, nil
}
}