Update classfile.ts for better parser #260
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This is a more complete parser, that I tested that parse class files more completely.
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Hi, thanks for extending the example. Can you fix the formatting errors? Should automatically fix them. |
I'll do it in a bit, I wrote it in javascript though, I'll attempt to translate it to typescript if it is a better example. |
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The updated code does not compile with the following errors: |
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@keichi Thanks a lot for the feedback, I did some changes (changed everything to const, fixed comments, fixed the ts errors), and tested with the following commands: I get no warnings and works. But maybe I am running it wrong? |
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| ElementValue = ElementValue.choice("value", { | ||
| tag: "tag", | ||
| choices: { | ||
| 66: Parser.start().uint16be("const_value_index"), // byte ('B') | ||
| 67: Parser.start().uint16be("const_value_index"), // char ('C') | ||
| 68: Parser.start().uint16be("const_value_index"), // double ('D') | ||
| 70: Parser.start().uint16be("const_value_index"), // float ('F') | ||
| 73: Parser.start().uint16be("const_value_index"), // int ('I') | ||
| 74: Parser.start().uint16be("const_value_index"), // long ('J') | ||
| 83: Parser.start().uint16be("const_value_index"), // short ('S') | ||
| 90: Parser.start().uint16be("const_value_index"), // boolean ('Z') | ||
| 115: Parser.start().uint16be("const_value_index"), // String ('s') | ||
| 101: Parser.start() | ||
| .uint16be("type_name_index") | ||
| .uint16be("const_name_index"), // enum constant ('e') | ||
| 99: Parser.start().uint16be("class_info_index"), // class ('c') | ||
| 64: Parser.start().nest("annotation_value", { type: "annotation" }), // annotation ('@') | ||
| 91: Parser.start() // array ('[') | ||
| .uint16be("num_values") | ||
| .array("values", { type: "elementvalue", length: "num_values" }), | ||
| }, | ||
| }); |
Check warning
Code scanning / CodeQL
Useless assignment to local variable Warning
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| CodeAttribute = CodeAttribute.useContextVars() | ||
| .uint16be("max_stack") | ||
| .uint16be("max_locals") | ||
| .uint32be("code_length") | ||
| .nest("code", { | ||
| type: BytecodeParser, | ||
| }) | ||
| .uint16be("exception_table_length") | ||
| .array("exception_table", { | ||
| type: Parser.start() | ||
| .uint16be("start_pc") | ||
| .uint16be("end_pc") | ||
| .uint16be("handler_pc") | ||
| .uint16be("catch_type"), | ||
| length: "exception_table_length", | ||
| }) | ||
| .uint16be("attributes_count") | ||
| .array("attributes", { | ||
| type: "attribute_info", | ||
| length: "attributes_count", | ||
| }); |
Check warning
Code scanning / CodeQL
Useless assignment to local variable Warning
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About these two warnings, I used let instead of const, because parser is a bit recursive, and I needed to define the "head" first otherwise it wouldn't let me use it. Something like, parser is not defined yet, maybe you know better.
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This is a more complete parser, that I tested that parse class files more completely.