Get the value of a string literal

[verhovsky]

If I try this

import Parser from 'web-tree-sitter';

await Parser.init();
const Bash = await Parser.Language.load('./tree-sitter-bash.wasm');
const parser = new Parser();
parser.setLanguage(Bash);

const result = parser.parse("echo 'hello world'");
console.log(result.rootNode.toString())
console.log(result.rootNode.firstChild.children.map(x => x.text));

I see

(program (command name: (command_name (word)) argument: (raw_string)))
[ 'echo', "'hello world'" ]

.text returns "'hello world'", the string still has its single quotes. I would like a way to get the actual value of the text, i.e. "hello world" from "'hello world'". This is a trivial example, but it also needs to handle escaped newlines and quotes (and probably other things I haven't thought of)

// returns
// [ 'echo', `'hello \\\nwor\\"ld'` ]
// instead of 
// [ 'echo', `'hello wor"ld'` ]
const result = parser.parse("echo 'hello \\\nwor\\\"ld'");

and the parsing logic for ANSI-C strings is even more complicated.

[ahlinc]

@verhovsky I've added a #103 PR that helps to resolve your case but I'm not sure that it would be merged. And if not you can copy a grammar.js into your repo and maintain a fork of the grammar that would feet your needs. It's not hard to incorporate tree-sitter grammar building into a CI.

[Freed-Wu]

Can I get string content from single quotes not only double quotes?

echo "a"
echo 'b'

# "a"
>>> tree.root_node.children[0].children[1].children
[<Node type=""", start_point=(0, 5), end_point=(0, 6)>, <Node type=string_content, start_point=(0, 6), end_point=(0, 7)>, <Node type=""", start_point=(0, 7), end_point=(0, 8)>]
# 'b'
>>> tree.root_node.children[1].children[1].children
[]

Why not

# 'b'
>>> tree.root_node.children[1].children[1].children
[<Node type="'", start_point=(1, 5), end_point=(1, 6)>, <Node type=string_content, start_point=(1, 6), end_point=(1, 7)>, <Node type="'", start_point=(1, 7), end_point=(1, 8)>]