C: OpenMP C と C++ の文法

C.1 表記
C.2 規則

C.1 表記

文法規則は、非ターミナルの名前に続いてコロン、別の行の置換代替で構成されます。

構文式用語 _opt は、置換内で用語が省略可能であることを示します。

構文式 term_optseq は term-seq_opt と同等で、次の追加規則があります。

term-seq:
 term
 term-seqterm
 term-seq,term

C.2 規則

表記は、C 標準のセクション 6.1 で説明されています。 この文法付録では、OpenMP C および C++ ディレクティブの基本言語文法の拡張機能を示します。

/* C++ (ISO/IEC 14882:1998) */

statement-seq:
 statement
 openmp-directive
 statement-seq statement
 statement-seq openmp-directive

/* in C90 (ISO/IEC 9899:1990) */

statement-list:
 statement
 openmp-directive
 statement-list statement
 statement-list openmp-directive

/* C99 (ISO/IEC 9899:1999) */

block-item:
 declaration
 statement
 openmp-directive

/* standard statements */

ステートメント:
 openmp-construct

openmp-construct:
 parallel-construct
 for-construct
 sections-construct
 single-construct
 parallel-for-construct
 parallel-sections-construct
 master-construct
 critical-construct
 atomic-construct
 ordered-construct

openmp-directive:
 barrier-directive
 flush-directive

structured-block:
 statement

parallel-construct:
 parallel-directive structured-block

parallel-directive:
  # pragma omp parallelparallel-clause_optseqnew-line

parallel-clause:
 unique-parallel-clause
 data-clause

unique-parallel-clause:
  if (式 (expression))
  num_threads (式 (expression))

for-construct:
 for-directive iteration-statement

for-directive:
  # pragma omp forfor-clause_optseqnew-line

for-clause:
 unique-for-clause
 data-clause
  nowait

unique-for-clause:
  ordered
  schedule (schedule-kind)
  schedule (schedule-kind,expression)

schedule-kind:
  static
  dynamic
  guided
  runtime

sections-construct:
 sections-directive section-scope

sections-directive:
  # pragma omp sectionssections-clause_optseqnew-line

sections-clause:
 data-clause
  nowait

section-scope:
 { section-sequence }

section-sequence:
 section-directive_optstructured-block
 section-sequence section-directive structured-block

section-directive:
  # pragma omp sectionnew-line

single-construct:
 single-directive structured-block

single-directive:
  # pragma omp singlesingle-clause_optseqnew-line

single-clause:
 data-clause
  nowait

parallel-for-construct:
 parallel-for-directive iteration-statement

parallel-for-directive:
  # pragma omp parallel forparallel-for-clause_optseqnew-line

parallel-for-clause:
 unique-parallel-clause
 unique-for-clause
 data-clause

parallel-sections-construct:
 parallel-sections-directive section-scope

parallel-sections-directive:
  # pragma omp parallel sectionsparallel-sections-clause_optseqnew-line

parallel-sections-clause:
 unique-parallel-clause
 data-clause

master-construct:
 master-directive structured-block

master-directive:
  # pragma omp masternew-line

critical-construct:
 critical-directive structured-block

critical-directive:
  # pragma omp criticalregion-phrase_optnew-line

region-phrase:
 (identifier)

barrier-directive:
  # pragma omp barriernew-line

atomic-construct:
 atomic-directive expression-statement

atomic-directive:
  # pragma omp atomicnew-line

flush-directive:
  # pragma omp flushflush-vars_optnew-line

flush-vars:
 (variable-list)

ordered-construct:
 ordered-directive structured-block

ordered-directive:
  # pragma omp orderednew-line

/* 標準宣言 */

declaration:
 threadprivate-directive

threadprivate-directive:
  # pragma omp threadprivate (variable-list)new-line

data-clause:
  private (variable-list)
  copyprivate (variable-list)
  firstprivate (variable-list)
  lastprivate (variable-list)
  shared (variable-list)
  default ( shared )
  default ( none )
  reduction (reduction-operator:variable-list)
  copyin (variable-list)

reduction-operator:
 例: + \* - & ^ | && ||

/* C */

variable-list:
 識別子
 variable-list,identifier

/* C++ */

variable-list:
 id-expression
 variable-list,id-expression