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improve source map granularity (#3030)

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fixes #3023
This commit is contained in:
Alex Lam S.L
2018-03-29 14:47:55 +09:00
committed by GitHub
parent 9a5e2052c4
commit 82ae95c334
5 changed files with 183 additions and 180 deletions
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77
lib/output.js
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@@ -1484,47 +1484,52 @@ function OutputStream(options) {
/* -----[ source map generators ]----- */
function DEFMAP(nodetype, generator) {
nodetype.DEFMETHOD("add_source_map", function(stream){
generator(this, stream);
nodetype.forEach(function(nodetype) {
nodetype.DEFMETHOD("add_source_map", generator);
});
};
}
// We could easily add info for ALL nodes, but it seems to me that
// would be quite wasteful, hence this noop in the base class.
DEFMAP(AST_Node, noop);
function basic_sourcemap_gen(self, output) {
output.add_mapping(self.start);
};
DEFMAP([
// We could easily add info for ALL nodes, but it seems to me that
// would be quite wasteful, hence this noop in the base class.
AST_Node,
// since the label symbol will mark it
AST_LabeledStatement,
AST_Toplevel,
], noop);
// XXX: I'm not exactly sure if we need it for all of these nodes,
// or if we should add even more.
DEFMAP(AST_Directive, basic_sourcemap_gen);
DEFMAP(AST_Debugger, basic_sourcemap_gen);
DEFMAP(AST_Symbol, basic_sourcemap_gen);
DEFMAP(AST_Jump, basic_sourcemap_gen);
DEFMAP(AST_StatementWithBody, basic_sourcemap_gen);
DEFMAP(AST_LabeledStatement, noop); // since the label symbol will mark it
DEFMAP(AST_Lambda, basic_sourcemap_gen);
DEFMAP(AST_Switch, basic_sourcemap_gen);
DEFMAP(AST_SwitchBranch, basic_sourcemap_gen);
DEFMAP(AST_BlockStatement, basic_sourcemap_gen);
DEFMAP(AST_Toplevel, noop);
DEFMAP(AST_New, basic_sourcemap_gen);
DEFMAP(AST_Try, basic_sourcemap_gen);
DEFMAP(AST_Catch, basic_sourcemap_gen);
DEFMAP(AST_Finally, basic_sourcemap_gen);
DEFMAP(AST_Definitions, basic_sourcemap_gen);
DEFMAP(AST_Constant, basic_sourcemap_gen);
DEFMAP(AST_ObjectSetter, function(self, output){
output.add_mapping(self.start, self.key.name);
});
DEFMAP(AST_ObjectGetter, function(self, output){
output.add_mapping(self.start, self.key.name);
});
DEFMAP(AST_ObjectProperty, function(self, output){
output.add_mapping(self.start, self.key);
DEFMAP([
AST_Array,
AST_BlockStatement,
AST_Catch,
AST_Constant,
AST_Debugger,
AST_Definitions,
AST_Directive,
AST_Finally,
AST_Jump,
AST_Lambda,
AST_New,
AST_Object,
AST_StatementWithBody,
AST_Symbol,
AST_Switch,
AST_SwitchBranch,
AST_Try,
], function(output) {
output.add_mapping(this.start);
});
DEFMAP([
AST_ObjectGetter,
AST_ObjectSetter,
], function(output) {
output.add_mapping(this.start, this.key.name);
});
DEFMAP([ AST_ObjectProperty ], function(output) {
output.add_mapping(this.start, this.key);
});
})();