Linus Groh 5072d4e02d LibJS+js: Support getting last value from "_" variable ...

The interpreter now has an "underscore is last value" flag, which makes
Interpreter::get_variable() return the last value if:

- The m_underscore_is_last_value flag is enabled
- The name of the variable lookup is "_"
- The result of that lookup is an empty value

That means "_" can still be used as a regular variable and will stop
doing its magic once anything is assigned to it.

Example REPL session:

> 1
1
> _ + _
2
> _ + _
4
> _ = "foo"
"foo"
> 1
1
> _
"foo"
> delete _
true
> 1
1
> _
1
>

2020-06-08 14:01:31 +02:00

..

Heap

LibJS: Fix undefined behavior in HeapBlock

2020-06-01 17:37:44 +02:00

Runtime

LibJS+LibWeb: Remove a bunch of calls to Interpreter::global_object()

2020-06-08 12:25:45 +02:00

Tests

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00

AST.cpp

LibJS: Add interpreter exception checks

2020-06-08 09:57:29 +02:00

AST.h

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00

CMakeLists.txt

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00

Console.cpp

LibJS: Move Interpreter::get_trace() to ConsoleClient

2020-06-02 15:22:34 +02:00

Console.h

LibJS: Move Interpreter::get_trace() to ConsoleClient

2020-06-02 15:22:34 +02:00

Forward.h

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00

Interpreter.cpp

LibJS+js: Support getting last value from "_" variable

2020-06-08 14:01:31 +02:00

Interpreter.h

LibJS+js: Support getting last value from "_" variable

2020-06-08 14:01:31 +02:00

Lexer.cpp

LibJS: Move regex logic to main Lexer if statement

2020-06-08 09:18:27 +02:00

Lexer.h

LibJS: Lex and parse regex literals, add RegExp objects

2020-06-07 19:06:55 +02:00

MarkupGenerator.cpp

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00

MarkupGenerator.h

Meta: Add a script check the presence of "#pragma once" in header files

2020-05-29 07:59:45 +02:00

Parser.cpp

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00

Parser.h

LibJS: Lex and parse regex literals, add RegExp objects

2020-06-07 19:06:55 +02:00

Token.cpp

LibJS: Fix out-of-bounds read when parsing escape sequences

2020-06-01 17:37:44 +02:00

Token.h

LibJS: Add BigInt

2020-06-07 19:29:40 +02:00