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https://github.com/jerryscript-project/jerryscript.git
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3d797b8836
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
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef VM_STACK_H
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#define VM_STACK_H
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#include "ecma-globals.h"
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/** \addtogroup vm Virtual machine
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* @{
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*
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* \addtogroup stack VM stack
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* @{
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*/
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/**
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* Create context on the vm stack.
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*/
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#define VM_CREATE_CONTEXT(type, end_offset) ((ecma_value_t) ((type) | ((end_offset) << 6)))
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/**
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* Create context on the vm stack with environment.
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*/
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#define VM_CREATE_CONTEXT_WITH_ENV(type, end_offset) \
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((ecma_value_t) ((type) | ((end_offset) << 6) | VM_CONTEXT_HAS_LEX_ENV))
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/**
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* Get type of a vm context.
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*/
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#define VM_GET_CONTEXT_TYPE(value) ((vm_stack_context_type_t) ((value) & 0x1f))
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/**
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* Get the end position of a vm context.
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*/
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#define VM_GET_CONTEXT_END(value) ((value) >> 6)
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/**
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* This flag is set if the context has a lexical environment.
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*/
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#define VM_CONTEXT_HAS_LEX_ENV 0x20
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/**
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* Context types for the vm stack.
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*/
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typedef enum
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{
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/* Update VM_CONTEXT_IS_FINALLY macro if the following three values are changed. */
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VM_CONTEXT_FINALLY_JUMP, /**< finally context with a jump */
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VM_CONTEXT_FINALLY_THROW, /**< finally context with a throw */
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VM_CONTEXT_FINALLY_RETURN, /**< finally context with a return */
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VM_CONTEXT_TRY, /**< try context */
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VM_CONTEXT_CATCH, /**< catch context */
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#if ENABLED (JERRY_ES2015)
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VM_CONTEXT_BLOCK, /**< block context */
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#endif /* ENABLED (JERRY_ES2015) */
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VM_CONTEXT_WITH, /**< with context */
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VM_CONTEXT_FOR_IN, /**< for-in context */
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#if ENABLED (JERRY_ES2015)
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VM_CONTEXT_FOR_OF, /**< for-of context */
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VM_CONTEXT_SUPER_CLASS, /**< super class context */
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#endif /* ENABLED (JERRY_ES2015) */
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} vm_stack_context_type_t;
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/**
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* Checks whether the context type is a finally type.
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*/
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#define VM_CONTEXT_IS_FINALLY(context_type) \
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((context_type) <= VM_CONTEXT_FINALLY_RETURN)
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ecma_value_t *vm_stack_context_abort (vm_frame_ctx_t *frame_ctx_p, ecma_value_t *vm_stack_top_p);
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bool vm_stack_find_finally (vm_frame_ctx_t *frame_ctx_p, ecma_value_t **vm_stack_top_ref_p,
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vm_stack_context_type_t finally_type, uint32_t search_limit);
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/**
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* @}
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* @}
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*/
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#endif /* !VM_STACK_H */
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