T1: Fix escape sequences — \n, \t, \r produce actual characters; add \xNN, \uNNNN #38

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opened 2026-03-24 22:25:34 +03:00 by NiXTheDev · 0 comments

NiXTheDev commented

2026-03-24 22:25:34 +03:00

(Migrated from github.com)

Task 1: Fix Escape Sequences

Wave: 1 (Critical Bug Fixes)
Category: deep
Parent: Epic #37

Problem

Escape sequences like \n, \t, \r are parsed but treated as literal characters ('n', 't', 'r'), not actual newline/tab/CR.

What to do

RED: Write failing tests that assert \n matches newline, \t matches tab, etc.
GREEN: Update lexer/parser to convert escape sequences to actual characters
REFACTOR: Ensure all escape sequences are consistent
Add: \xNN (hex escape), \uNNNN (unicode escape)
Scope: \n, \t, \r only. No \a, \e, \f, \v, \0 (defer to v0.2.0)

Acceptance Criteria

Test file: ogex/tests/escape_sequence_tests.rs
\n matches 0x0A (newline)
\t matches 0x09 (tab)
\r matches 0x0D (carriage return)
\xNN matches hex byte
\uNNNN matches unicode codepoint

Files

ogex/src/lexer.rs:28-80 — Token enum
ogex/src/parser.rs:260-270 — escape handling

Commit

fix: escape sequences produce actual characters

## Task 1: Fix Escape Sequences **Wave**: 1 (Critical Bug Fixes) **Category**: deep **Parent**: Epic #37 ### Problem Escape sequences like \n, \t, \r are parsed but treated as literal characters ('n', 't', 'r'), not actual newline/tab/CR. ### What to do - RED: Write failing tests that assert `\n` matches newline, `\t` matches tab, etc. - GREEN: Update lexer/parser to convert escape sequences to actual characters - REFACTOR: Ensure all escape sequences are consistent - Add: \xNN (hex escape), \uNNNN (unicode escape) - Scope: \n, \t, \r only. No \a, \e, \f, \v, \0 (defer to v0.2.0) ### Acceptance Criteria - [ ] Test file: ogex/tests/escape_sequence_tests.rs - [ ] \n matches 0x0A (newline) - [ ] \t matches 0x09 (tab) - [ ] \r matches 0x0D (carriage return) - [ ] \xNN matches hex byte - [ ] \uNNNN matches unicode codepoint ### Files - `ogex/src/lexer.rs:28-80` — Token enum - `ogex/src/parser.rs:260-270` — escape handling ### Commit `fix: escape sequences produce actual characters`