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formula

0.1.8
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Parse formula (mostly excel-related formulas, but not limited to Excel).

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formula src formula_parser.yrl
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src/formula_parser.yrl 

Nonterminals



expression



function function_arguments

prefix infix postfix

array array_items array_item_row

.



Terminals

symbol

% string path range error

string

'>=' '<=' '<>' '+' '-' '*' '/' '^' '&' '=' '>' '<'

'(' ')' ',' '%'

'{' '}' ';'

.



Rootsymbol expression.



Left 150 '=' '<>'.

Left 160 '<' '>' '<=' '>='.

Right 200 '&'.

Left 210 '+' '-'.

Left 220 '*' '/'.

Nonassoc 300 '^'.

Nonassoc 310 '%'.



expression -> symbol : 'Elixir.Formula.Symbol':new('$1').

expression -> string : element(3, '$1').

% expression -> path : 'Elixir.Formula.Path':new('$1').

% expression -> range : 'Elixir.Formula.Range':new('$1').

% expression -> error : 'Elixir.Formula.Error':new('$1').

expression -> prefix : '$1'.

expression -> infix : '$1'.

expression -> postfix : '$1'.

expression -> array : '$1'.

expression -> '(' expression ')' : '$2'.

expression -> function : '$1'.



function -> symbol '(' ')' : 'Elixir.Formula.Function':new('$1', []).

function -> symbol '(' function_arguments ')' : 'Elixir.Formula.Function':new('$1', '$3').



function_arguments -> expression : ['$1'].

function_arguments -> expression ',' function_arguments : ['$1' | '$3'].



prefix -> '+' expression : 'Elixir.Formula.Function':new('+', ['$1']).

prefix -> '-' expression : 'Elixir.Formula.Function':new('-', ['$1']).



infix -> expression '+' expression : 'Elixir.Formula.Function':new('+', ['$1', '$3']).

infix -> expression '-' expression : 'Elixir.Formula.Function':new('-', ['$1', '$3']).

infix -> expression '*' expression : 'Elixir.Formula.Function':new('*', ['$1', '$3']).

infix -> expression '/' expression : 'Elixir.Formula.Function':new('/', ['$1', '$3']).

infix -> expression '^' expression : 'Elixir.Formula.Function':new('^', ['$1', '$3']).

infix -> expression '<' expression : 'Elixir.Formula.Function':new('>', ['$1', '$3']).

infix -> expression '>' expression : 'Elixir.Formula.Function':new('>', ['$1', '$3']).

infix -> expression '=' expression : 'Elixir.Formula.Function':new('=', ['$1', '$3']).

infix -> expression '>=' expression : 'Elixir.Formula.Function':new('>=', ['$1', '$3']).

infix -> expression '<=' expression : 'Elixir.Formula.Function':new('<=', ['$1', '$3']).

infix -> expression '<>' expression : 'Elixir.Formula.Function':new('<>', ['$1', '$3']).

infix -> expression '&' expression : 'Elixir.Formula.Function':new('&', ['$1', '$3']).



postfix -> expression '%' : 'Elixir.Formula.Function':new('%', ['$1']).



array -> '{' '}' : [].

array -> '{' array_items '}' : '$2'.



array_items -> array_item_row : ['$1'].

array_items -> array_item_row ';' array_items : ['$1' | '$3'].



array_item_row -> expression : ['$1'].

array_item_row -> expression ',' array_item_row : ['$1' | '$3'].



Erlang code.