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Nasal-Interpreter
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update

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Valk Richard Li 2019-08-16 22:59:05 +08:00 committed by GitHub
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commit f8e9568fc6
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1 changed files with 49 additions and 0 deletions
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49
version0.4/ebnf.cpp
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@ -1 +1,50 @@
//
//definition:
//var e=1;
//var e=e;
//var e=e[0];
//var e=e[i];
//var e=e.e;
//var e=e[func()];
//var e=func();
// identifier
// scalar
// call_func -> identifier func_name()
// array_search -> identifier e[0] e[e]
// hash_search -> identifier e.e
<1><scalar> ::=
<number> //NUMBER
<string> //STRING
<2><scalars> ::=
<scalar>|<scalars> <,> <scalar>|<identifier>
<identifier>|<identifiers> <,> <scalar>
<3><identifier> ::=
<identifier> // IDENTIFIER
<identifier> <[> <identifier>|<scalar> <]> //__array_search
<identifier> <.> <identifier> //__hash_search
<identifier> <(> <identifier>|<identifiers>|<scalar>|<scalars> <)> //__call_func
<4><identifiers> ::=
<identifier> <,> <identifier>
<identifiers> <,> <identifier>
<5><definition> ::=
<var> <identifier> <=> <identifier> <;>
<var> <identifier> <=> <call_function> <;>
<var> <identifier> <=> <[><]> <;>
<var> <identifier> <=> <{><}> <;>
<var> <identifier> <=> <[> <scalar>|<scalars>|<identifier>|<identifiers> <]> <;>
<var> <identifier> <=> <{> <hash_members> <}> <;>
<6><assignment> ::=
<identifier> <=> <identifier> <;>
<7><def_func> ::=
<var> <identifier> <=> <func> <(><)> <{><}>
<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{><}>
<var> <identifier> <=> <func> <(><)> <{> <statements> <}>
<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{> <statements> <}>
<8><statement> ::=
<definition>
<assignment>
<def_func>
<identifier> <;>
<9><statements> ::=
<statement>|<statements> <statement>