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Implement for[in/of]-let construct. (#3294)

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This patch implements let/const support for all "for" statements.
It includes an algorithm for cloning declarative lexical environments.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-11-11 13:53:32 +01:00
committed by Dániel Bátyai
parent 58f71e6ffa
commit da69589f05
8 changed files with 503 additions and 110 deletions
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jerry-core/parser/js/byte-code.h
+4
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@@ -544,6 +544,10 @@
VM_OC_PUSH_LIT_POS_BYTE | VM_OC_GET_LITERAL) \
CBC_OPCODE (CBC_EXT_PUSH_LITERAL_PUSH_NUMBER_NEG_BYTE, CBC_HAS_LITERAL_ARG | CBC_HAS_BYTE_ARG, 2, \
VM_OC_PUSH_LIT_NEG_BYTE | VM_OC_GET_LITERAL) \
CBC_OPCODE (CBC_EXT_CLONE_CONTEXT, CBC_NO_FLAG, 0, \
VM_OC_CLONE_CONTEXT) \
CBC_OPCODE (CBC_EXT_CLONE_FULL_CONTEXT, CBC_NO_FLAG, 0, \
VM_OC_CLONE_CONTEXT) \
CBC_OPCODE (CBC_EXT_RESOURCE_NAME, CBC_NO_FLAG, 0, \
VM_OC_RESOURCE_NAME) \
CBC_OPCODE (CBC_EXT_LINE, CBC_NO_FLAG, 0, \