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Implement the core of let/const statement. (#3239)

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This patch implements the core part of let/const statements. Redeclarations are correctly
detected and separate contexts are correctly created for these statements. Register
optimizations are also emplyed whenever possible.

Lots of features are still missing:
 - checking the var statements in eval
 - const are treated as lets
 - single statement checks are missing
 - export declarations are exported as vars, let/const export is not supported

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-10-25 18:08:10 +02:00
committed by Dániel Bátyai
parent 4b352758c1
commit 3d797b8836
33 changed files with 1997 additions and 217 deletions
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tests/unit-core/test-snapshot.c
+3 -3
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@@ -223,15 +223,15 @@ main (void)
/* Check the snapshot data. Unused bytes should be filled with zeroes */
const uint8_t expected_data[] =
{
0x4A, 0x52, 0x52, 0x59, 0x19, 0x00, 0x00, 0x00,
0x4A, 0x52, 0x52, 0x59, 0x1A, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
0x03, 0x00, 0x01, 0x00, 0x21, 0x00, 0x01, 0x00,
0x00, 0x00, 0x00, 0x01, 0x18, 0x00, 0x00, 0x00,
0x28, 0x00, 0xB7, 0x45, 0x00, 0x00, 0x00, 0x00,
0x2C, 0x00, 0xBC, 0x4A, 0x00, 0x00, 0x00, 0x00,
0x03, 0x00, 0x01, 0x00, 0x21, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x01, 0x07, 0x00, 0x00, 0x00,
0x46, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x4B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x14, 0x00, 0x73, 0x74, 0x72, 0x69, 0x6E, 0x67,
0x20, 0x66, 0x72, 0x6F, 0x6D, 0x20, 0x73, 0x6E,
0x61, 0x70, 0x73, 0x68, 0x6F, 0x74,