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flatbuffers
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feat(mutable-js): The mutable Scalar generation. 

This is just the initial commit to start the conversation on adding mutation to javascript.
This commit is contained in:
Michael Paulson 2016-07-22 11:11:56 -07:00
parent 1bba4fd9ea
commit 0230a7173f
1 changed files with 18 additions and 2 deletions
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20
src/idl_gen_js.cpp
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@ -79,7 +79,7 @@ class JsGenerator : public BaseGenerator {
for (auto it = parser_.structs_.vec.begin();
it != parser_.structs_.vec.end(); ++it) {
auto &struct_def = **it;
GenStruct(struct_def, decl_code_ptr, exports_code_ptr);
GenStruct(parser_, struct_def, decl_code_ptr, exports_code_ptr);
}
}
void GenNamespaces(std::string *code_ptr, std::string *exports_ptr) {
@ -361,7 +361,7 @@ static void GenStructBody(const StructDef &struct_def,
}
// Generate an accessor struct with constructor for a flatbuffers struct.
void GenStruct(StructDef &struct_def, std::string *code_ptr, std::string *exports_ptr) {
void GenStruct(const Parser &parser, StructDef &struct_def, std::string *code_ptr, std::string *exports_ptr) {
if (struct_def.generated) return;
std::string &code = *code_ptr;
std::string &exports = *exports_ptr;
@ -550,6 +550,22 @@ void GenStruct(StructDef &struct_def, std::string *code_ptr, std::string *export
}
code += "};\n\n";
// Adds the mutable scalar value to the output
if (IsScalar(field.value.type.base_type) && parser.opts.mutable_buffer) {
std::string annotations = "@param {" + GenTypeName(field.value.type, true) + "} value\n";
GenDocComment(code_ptr, annotations +
"@returns {boolean}");
code += object_name + ".prototype.mutate_" + field.name + " = function(value) {\n";
code += " var offset = this.bb.__offset(this.bb_pos, " + NumToString(field.value.offset) + ")\n\n";
code += " if (offset === 0) {\n";
code += " return false;\n";
code += " }\n\n";
code += " this.bb.write" + MakeCamel(GenType(field.value.type)) + "(this.bb_pos + offset, value);\n";
code += " return true;\n";
code += "}\n\n";
}
// Emit vector helpers
if (field.value.type.base_type == BASE_TYPE_VECTOR) {
// Emit a length helper