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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/vm/vm.h
+2
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@@ -226,6 +226,7 @@ typedef enum
#endif /* ENABLED (JERRY_LINE_INFO) */
#if ENABLED (JERRY_ES2015)
VM_OC_ASSIGN_LET_CONST, /**< assign values to let/const declarations */
VM_OC_CLONE_CONTEXT, /**< clone lexical environment with let/const declarations */
VM_OC_SET_COMPUTED_PROPERTY, /**< set computed property */
VM_OC_FOR_OF_CREATE_CONTEXT, /**< for of create context */
@@ -265,6 +266,7 @@ typedef enum
#endif /* !ENABLED (JERRY_LINE_INFO) */
#if !ENABLED (JERRY_ES2015)
VM_OC_ASSIGN_LET_CONST = VM_OC_NONE, /**< assign values to let/const declarations */
VM_OC_CLONE_CONTEXT = VM_OC_NONE, /**< clone lexical environment with let/const declarations */
VM_OC_SET_COMPUTED_PROPERTY = VM_OC_NONE, /**< set computed property is unused */
VM_OC_BLOCK_CREATE_CONTEXT = VM_OC_NONE, /**< create context for blocks enclosed in braces */