melina:meta/xml转换器
melina的Python项目详细描述
melina可以将meta.xml转换为元语言（类似于protobuf）并返回。
melina --meta-out DIR1 meta.xml # to meta melina --xml-out DIR2 meta.meta # back to xml melina --meta-stdout meta.xml > x.meta # or to stdout
梅丽娜的语言就是这样的：
/// pdmeta: "1.1", domain: "f", product: "b", release: "AX", version: "1.5", revision: "198" // line above is a header with meta module versions. // It needs to be the first symbol in file and start with '///' moSCALAR{// you can define managed objects like structs in C++ boolx;inty;stringz;};moCOMPLEX{// enum/struct fields contain definition of enum/struct // enum/struct name should begin with small letter - after all it's a name of variable enumx{A=1,B,C=2};structy{intz;structv{intw;};};};moCARDINALITY{// you can define cardinality of each managed object or struct field intx;// required by default optionalinty;// optional integer, may be null repeatedintz;// list of integers repeated(15)intz;// at most 15 'z' integers };moDEFAULTS{// bool, int, string, enum can have default values boolx[default=true];inty[default=12];stringz[default="foo bar"];enumv[default=12]{A=1,B=12};};moRANGES{// int/string fields can specify allowed ranges // if int has a 3-param specifier, it's considered a "float" int(0..12)x;// allowed integers from 0 to 12 inclusive int(-0.5,0.5,0.001)y;// allowed floats from -0.5 to 0.5 inclusive with step 0.001 string(0..10)z;// allowed string length from 0 to 10 chars inclusive };moUNITS{// integers can have units (for documentational purposes) inty[units="kbps"];};/** * Example managed object description. */moCOMMENTS{// you can use C++-style '//foo' or '/*foo*/' comments in meta files // doxygen-style comments '///foo' and '/**foo*/' are treated as mo/field description, // if present immediately above or rightwards of mo/field intx;/// Example scalar field description inty;/** Example scalar field description *//** * Example complex type description. */structz{};/// Example complex type description. structv{};};moCHILDREN->FIRST,SECOND,THIRD(10){// managed object can have children defined // children can have max count specified in parens (at most 10 THIRD children) };mo(hc)FLAGS{// each managed object has: hidden('h'), create('c'), update('u'), delete('d') flags. // If not specified, hidden is assumed false, rest is assumed true. // Specification may be provided as 'hcud' letters in parens. };
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