Note R-based dparser tree walking works on Windows (with R tools) Mac, or Linux. Linking to arbitrary c grammars works on any platform.
dparse( grammar, start_state = 0, save_parse_tree = TRUE, partial_parses = FALSE, compare_stacks = TRUE, commit_actions_interval = 100, fixup = TRUE, fixup_ebnf = FALSE, nogreedy = FALSE, noheight = FALSE, use_file_name = TRUE, parse_size = 1024, verbose_level = 0, children_first = TRUE, ... )
| grammar | Dparser grammar filename (must be a file with a ".g" extension) |
|---|---|
| start_state | Start State (default 0) |
| save_parse_tree | Save Parse Tree (default TRUE) |
| partial_parses | Partial Parses (default FALSE) |
| compare_stacks | Compare Stacks (default TRUE) |
| commit_actions_interval | Commit Interval (default 100) |
| fixup | Fix-up Internal Productions (default FALSE) |
| fixup_ebnf | Fixup EBNF Productions (default FALSE) |
| nogreedy | No Greediness for Disambiguation (default FALSE) |
| noheight | No Height for Disambiguation (default FALSE) |
| use_file_name | Use File Name for syntax errors (default TRUE) |
| parse_size | Parser size (default 1024) |
| verbose_level | the level of verbosity when creating parser (default 0) |
| children_first | When TRUE, parse the children before the parent (default TRUE). |
| ... | Parameters sent to |
A function that allows parsing of a file based on the grammar supplied. This function would be able to parse arbitrary grammars the way you may want with your own user supplied function.
There are two user options that control if the dlls for the grammars created by dparser will be deleted upon garbage collection or R exit if they are not associated with any active objects. These are:
dpaser.rm.unnamed.parser.dll:when TRUE, this remove parsers
that are created from strings, or other memory-based items in R.
dpaser.rm.unnamed.parser.dll:when TRUE, this
removes parsers created from grammar files.
# \donttest{ ## This creates the R based parsing function. It requires ## compilation and runs on most OSes, with the exception of solaris. ## Windows requires Rtools to be installed. f <- dparse(system.file("tran.g", package = "dparser"),children_first=FALSE) ## Once created, you may then use this function to parse an ## arbitrary syntax file. For example: f(" b = -1 d/dt(X) = a*X + Y*Z; d/dt(Y) = b*(Y - Z); d/dt(Z) = -X*Y + c*Y - Z if (t < 0.02 | t > 99.98){ print } ", function(name, value, pos, depth){ ## This prints the name, value, position and depth passed to the ##parsing function. cat(sprintf("name:%s;value:%s;pos:%s;depth:%s\n", name, value, pos, depth)); })#> name:statement_list;value:b = -1 #> d/dt(X) = a*X + Y*Z; #> d/dt(Y) = b*(Y - Z); #> d/dt(Z) = -X*Y + c*Y - Z #> if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:-2;depth:0 #> name:statement_list;value:b = -1 #> d/dt(X) = a*X + Y*Z; #> d/dt(Y) = b*(Y - Z); #> d/dt(Z) = -X*Y + c*Y - Z #> if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:0;depth:0 #> name:statement_list__3;value:b = -1 #> d/dt(X) = a*X + Y*Z; #> d/dt(Y) = b*(Y - Z); #> d/dt(Z) = -X*Y + c*Y - Z #> if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:-2;depth:1 #> name:statement_list__3;value:b = -1 #> ;pos:0;depth:1 #> name:statement_list__2;value:b = -1 #> ;pos:-2;depth:2 #> name:statement_list__2;value:b = -1 #> ;pos:0;depth:2 #> name:statement;value:b = -1 #> ;pos:-2;depth:3 #> name:statement;value:b = -1;pos:0;depth:3 #> name:ini;value:b = -1;pos:-2;depth:4 #> name:ini;value:b;pos:0;depth:4 #> name:identifier_r;value:b;pos:-2;depth:5 #> name:identifier_r;value:b;pos:0;depth:5 #> name:identifier_r_1;value:b;pos:-2;depth:6 #> name:identifier_r_1;value:b;pos:0;depth:6 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:b;pos:-1;depth:7 #> name:ini;value:=;pos:1;depth:4 #> name:ini__19;value:=;pos:-2;depth:5 #> name:ini__19;value:=;pos:0;depth:5 #> name:=;value:=;pos:-1;depth:6 #> name:ini;value:-1;pos:2;depth:4 #> name:ini_const;value:-1;pos:-2;depth:5 #> name:ini_const;value:-;pos:0;depth:5 #> name:ini_const__80;value:-;pos:-2;depth:6 #> name:ini_const__80;value:-;pos:0;depth:6 #> name:-;value:-;pos:-1;depth:7 #> name:ini_const;value:1;pos:1;depth:5 #> name:constant;value:1;pos:-2;depth:6 #> name:constant;value:1;pos:0;depth:6 #> name:decimalint;value:1;pos:-2;depth:7 #> name:decimalint;value:1;pos:0;depth:7 #> name:0|([1-9][0-9]*);value:1;pos:-1;depth:8 #> name:statement;value:;pos:1;depth:3 #> name:end_statement;value:;pos:-2;depth:4 #> name:end_statement;value:;pos:0;depth:4 #> name:end_statement__36;value:;pos:-1;depth:5 #> name:statement_list__3;value:d/dt(X) = a*X + Y*Z;;pos:1;depth:1 #> name:statement_list__2;value:d/dt(X) = a*X + Y*Z;;pos:-2;depth:2 #> name:statement_list__2;value:d/dt(X) = a*X + Y*Z;;pos:0;depth:2 #> name:statement;value:d/dt(X) = a*X + Y*Z;;pos:-2;depth:3 #> name:statement;value:d/dt(X) = a*X + Y*Z;pos:0;depth:3 #> name:derivative;value:d/dt(X) = a*X + Y*Z;pos:-2;depth:4 #> name:derivative;value:d/dt;pos:0;depth:4 #> name:d/dt;value:d/dt;pos:-1;depth:5 #> name:derivative;value:(;pos:1;depth:4 #> name:(;value:(;pos:-1;depth:5 #> name:derivative;value:X;pos:2;depth:4 #> name:identifier_r_no_output;value:X;pos:-2;depth:5 #> name:identifier_r_no_output;value:X;pos:0;depth:5 #> name:identifier_r_no_output_1;value:X;pos:-2;depth:6 #> name:identifier_r_no_output_1;value:X;pos:0;depth:6 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:X;pos:-1;depth:7 #> name:derivative;value:);pos:3;depth:4 #> name:);value:);pos:-1;depth:5 #> name:derivative;value:=;pos:4;depth:4 #> name:derivative__23;value:=;pos:-2;depth:5 #> name:derivative__23;value:=;pos:0;depth:5 #> name:=;value:=;pos:-1;depth:6 #> name:derivative;value:a*X + Y*Z;pos:5;depth:4 #> name:additive_expression;value:a*X + Y*Z;pos:-2;depth:5 #> name:additive_expression;value:a*X;pos:0;depth:5 #> name:multiplicative_expression;value:a*X;pos:-2;depth:6 #> name:multiplicative_expression;value:a;pos:0;depth:6 #> name:unary_expression;value:a;pos:-2;depth:7 #> name:unary_expression;value:;pos:0;depth:7 #> name:unary_expression__66;value:;pos:-1;depth:8 #> name:unary_expression;value:a;pos:1;depth:7 #> name:unary_expression__67;value:a;pos:-2;depth:8 #> name:unary_expression__67;value:a;pos:0;depth:8 #> name:primary_expression;value:a;pos:-2;depth:9 #> name:primary_expression;value:a;pos:0;depth:9 #> name:identifier_r;value:a;pos:-2;depth:10 #> name:identifier_r;value:a;pos:0;depth:10 #> name:identifier_r_1;value:a;pos:-2;depth:11 #> name:identifier_r_1;value:a;pos:0;depth:11 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:a;pos:-1;depth:12 #> name:multiplicative_expression;value:*X;pos:1;depth:6 #> name:multiplicative_expression__63;value:*X;pos:-2;depth:7 #> name:multiplicative_expression__63;value:*X;pos:0;depth:7 #> name:multiplicative_expression__61;value:*X;pos:-2;depth:8 #> name:multiplicative_expression__61;value:*;pos:0;depth:8 #> name:multiplicative_expression__61__62;value:*;pos:-2;depth:9 #> name:multiplicative_expression__61__62;value:*;pos:0;depth:9 #> name:*;value:*;pos:-1;depth:10 #> name:multiplicative_expression__61;value:X;pos:1;depth:8 #> name:unary_expression;value:X;pos:-2;depth:9 #> name:unary_expression;value:;pos:0;depth:9 #> name:unary_expression__66;value:;pos:-1;depth:10 #> name:unary_expression;value:X;pos:1;depth:9 #> name:unary_expression__67;value:X;pos:-2;depth:10 #> name:unary_expression__67;value:X;pos:0;depth:10 #> name:primary_expression;value:X;pos:-2;depth:11 #> name:primary_expression;value:X;pos:0;depth:11 #> name:identifier_r;value:X;pos:-2;depth:12 #> name:identifier_r;value:X;pos:0;depth:12 #> name:identifier_r_1;value:X;pos:-2;depth:13 #> name:identifier_r_1;value:X;pos:0;depth:13 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:X;pos:-1;depth:14 #> name:additive_expression;value:+ Y*Z;pos:1;depth:5 #> name:additive_expression__59;value:+ Y*Z;pos:-2;depth:6 #> name:additive_expression__59;value:+ Y*Z;pos:0;depth:6 #> name:additive_expression__57;value:+ Y*Z;pos:-2;depth:7 #> name:additive_expression__57;value:+;pos:0;depth:7 #> name:additive_expression__57__58;value:+;pos:-2;depth:8 #> name:additive_expression__57__58;value:+;pos:0;depth:8 #> name:+;value:+;pos:-1;depth:9 #> name:additive_expression__57;value:Y*Z;pos:1;depth:7 #> name:multiplicative_expression;value:Y*Z;pos:-2;depth:8 #> name:multiplicative_expression;value:Y;pos:0;depth:8 #> name:unary_expression;value:Y;pos:-2;depth:9 #> name:unary_expression;value:;pos:0;depth:9 #> name:unary_expression__66;value:;pos:-1;depth:10 #> name:unary_expression;value:Y;pos:1;depth:9 #> name:unary_expression__67;value:Y;pos:-2;depth:10 #> name:unary_expression__67;value:Y;pos:0;depth:10 #> name:primary_expression;value:Y;pos:-2;depth:11 #> name:primary_expression;value:Y;pos:0;depth:11 #> name:identifier_r;value:Y;pos:-2;depth:12 #> name:identifier_r;value:Y;pos:0;depth:12 #> name:identifier_r_1;value:Y;pos:-2;depth:13 #> name:identifier_r_1;value:Y;pos:0;depth:13 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Y;pos:-1;depth:14 #> name:multiplicative_expression;value:*Z;pos:1;depth:8 #> name:multiplicative_expression__63;value:*Z;pos:-2;depth:9 #> name:multiplicative_expression__63;value:*Z;pos:0;depth:9 #> name:multiplicative_expression__61;value:*Z;pos:-2;depth:10 #> name:multiplicative_expression__61;value:*;pos:0;depth:10 #> name:multiplicative_expression__61__62;value:*;pos:-2;depth:11 #> name:multiplicative_expression__61__62;value:*;pos:0;depth:11 #> name:*;value:*;pos:-1;depth:12 #> name:multiplicative_expression__61;value:Z;pos:1;depth:10 #> name:unary_expression;value:Z;pos:-2;depth:11 #> name:unary_expression;value:;pos:0;depth:11 #> name:unary_expression__66;value:;pos:-1;depth:12 #> name:unary_expression;value:Z;pos:1;depth:11 #> name:unary_expression__67;value:Z;pos:-2;depth:12 #> name:unary_expression__67;value:Z;pos:0;depth:12 #> name:primary_expression;value:Z;pos:-2;depth:13 #> name:primary_expression;value:Z;pos:0;depth:13 #> name:identifier_r;value:Z;pos:-2;depth:14 #> name:identifier_r;value:Z;pos:0;depth:14 #> name:identifier_r_1;value:Z;pos:-2;depth:15 #> name:identifier_r_1;value:Z;pos:0;depth:15 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Z;pos:-1;depth:16 #> name:statement;value:;;pos:1;depth:3 #> name:end_statement;value:;;pos:-2;depth:4 #> name:end_statement;value:;;pos:0;depth:4 #> name:end_statement__36;value:;;pos:-2;depth:5 #> name:end_statement__36;value:;;pos:0;depth:5 #> name:end_statement__35;value:;;pos:-2;depth:6 #> name:end_statement__35;value:;;pos:0;depth:6 #> name:;;value:;;pos:-1;depth:7 #> name:statement_list__3;value:d/dt(Y) = b*(Y - Z);;pos:2;depth:1 #> name:statement_list__2;value:d/dt(Y) = b*(Y - Z);;pos:-2;depth:2 #> name:statement_list__2;value:d/dt(Y) = b*(Y - Z);;pos:0;depth:2 #> name:statement;value:d/dt(Y) = b*(Y - Z);;pos:-2;depth:3 #> name:statement;value:d/dt(Y) = b*(Y - Z);pos:0;depth:3 #> name:derivative;value:d/dt(Y) = b*(Y - Z);pos:-2;depth:4 #> name:derivative;value:d/dt;pos:0;depth:4 #> name:d/dt;value:d/dt;pos:-1;depth:5 #> name:derivative;value:(;pos:1;depth:4 #> name:(;value:(;pos:-1;depth:5 #> name:derivative;value:Y;pos:2;depth:4 #> name:identifier_r_no_output;value:Y;pos:-2;depth:5 #> name:identifier_r_no_output;value:Y;pos:0;depth:5 #> name:identifier_r_no_output_1;value:Y;pos:-2;depth:6 #> name:identifier_r_no_output_1;value:Y;pos:0;depth:6 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Y;pos:-1;depth:7 #> name:derivative;value:);pos:3;depth:4 #> name:);value:);pos:-1;depth:5 #> name:derivative;value:=;pos:4;depth:4 #> name:derivative__23;value:=;pos:-2;depth:5 #> name:derivative__23;value:=;pos:0;depth:5 #> name:=;value:=;pos:-1;depth:6 #> name:derivative;value:b*(Y - Z);pos:5;depth:4 #> name:additive_expression;value:b*(Y - Z);pos:-2;depth:5 #> name:additive_expression;value:b*(Y - Z);pos:0;depth:5 #> name:multiplicative_expression;value:b*(Y - Z);pos:-2;depth:6 #> name:multiplicative_expression;value:b;pos:0;depth:6 #> name:unary_expression;value:b;pos:-2;depth:7 #> name:unary_expression;value:;pos:0;depth:7 #> name:unary_expression__66;value:;pos:-1;depth:8 #> name:unary_expression;value:b;pos:1;depth:7 #> name:unary_expression__67;value:b;pos:-2;depth:8 #> name:unary_expression__67;value:b;pos:0;depth:8 #> name:primary_expression;value:b;pos:-2;depth:9 #> name:primary_expression;value:b;pos:0;depth:9 #> name:identifier_r;value:b;pos:-2;depth:10 #> name:identifier_r;value:b;pos:0;depth:10 #> name:identifier_r_1;value:b;pos:-2;depth:11 #> name:identifier_r_1;value:b;pos:0;depth:11 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:b;pos:-1;depth:12 #> name:multiplicative_expression;value:*(Y - Z);pos:1;depth:6 #> name:multiplicative_expression__63;value:*(Y - Z);pos:-2;depth:7 #> name:multiplicative_expression__63;value:*(Y - Z);pos:0;depth:7 #> name:multiplicative_expression__61;value:*(Y - Z);pos:-2;depth:8 #> name:multiplicative_expression__61;value:*;pos:0;depth:8 #> name:multiplicative_expression__61__62;value:*;pos:-2;depth:9 #> name:multiplicative_expression__61__62;value:*;pos:0;depth:9 #> name:*;value:*;pos:-1;depth:10 #> name:multiplicative_expression__61;value:(Y - Z);pos:1;depth:8 #> name:unary_expression;value:(Y - Z);pos:-2;depth:9 #> name:unary_expression;value:;pos:0;depth:9 #> name:unary_expression__66;value:;pos:-1;depth:10 #> name:unary_expression;value:(Y - Z);pos:1;depth:9 #> name:unary_expression__67;value:(Y - Z);pos:-2;depth:10 #> name:unary_expression__67;value:(Y - Z);pos:0;depth:10 #> name:primary_expression;value:(Y - Z);pos:-2;depth:11 #> name:primary_expression;value:(;pos:0;depth:11 #> name:(;value:(;pos:-1;depth:12 #> name:primary_expression;value:Y - Z;pos:1;depth:11 #> name:additive_expression;value:Y - Z;pos:-2;depth:12 #> name:additive_expression;value:Y ;pos:0;depth:12 #> name:multiplicative_expression;value:Y ;pos:-2;depth:13 #> name:multiplicative_expression;value:Y;pos:0;depth:13 #> name:unary_expression;value:Y;pos:-2;depth:14 #> name:unary_expression;value:;pos:0;depth:14 #> name:unary_expression__66;value:;pos:-1;depth:15 #> name:unary_expression;value:Y;pos:1;depth:14 #> name:unary_expression__67;value:Y;pos:-2;depth:15 #> name:unary_expression__67;value:Y;pos:0;depth:15 #> name:primary_expression;value:Y;pos:-2;depth:16 #> name:primary_expression;value:Y;pos:0;depth:16 #> name:identifier_r;value:Y;pos:-2;depth:17 #> name:identifier_r;value:Y;pos:0;depth:17 #> name:identifier_r_1;value:Y;pos:-2;depth:18 #> name:identifier_r_1;value:Y;pos:0;depth:18 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Y;pos:-1;depth:19 #> name:multiplicative_expression;value:;pos:1;depth:13 #> name:multiplicative_expression__63;value:;pos:-1;depth:14 #> name:additive_expression;value:- Z;pos:1;depth:12 #> name:additive_expression__59;value:- Z;pos:-2;depth:13 #> name:additive_expression__59;value:- Z;pos:0;depth:13 #> name:additive_expression__57;value:- Z;pos:-2;depth:14 #> name:additive_expression__57;value:-;pos:0;depth:14 #> name:additive_expression__57__58;value:-;pos:-2;depth:15 #> name:additive_expression__57__58;value:-;pos:0;depth:15 #> name:-;value:-;pos:-1;depth:16 #> name:additive_expression__57;value:Z;pos:1;depth:14 #> name:multiplicative_expression;value:Z;pos:-2;depth:15 #> name:multiplicative_expression;value:Z;pos:0;depth:15 #> name:unary_expression;value:Z;pos:-2;depth:16 #> name:unary_expression;value:;pos:0;depth:16 #> name:unary_expression__66;value:;pos:-1;depth:17 #> name:unary_expression;value:Z;pos:1;depth:16 #> name:unary_expression__67;value:Z;pos:-2;depth:17 #> name:unary_expression__67;value:Z;pos:0;depth:17 #> name:primary_expression;value:Z;pos:-2;depth:18 #> name:primary_expression;value:Z;pos:0;depth:18 #> name:identifier_r;value:Z;pos:-2;depth:19 #> name:identifier_r;value:Z;pos:0;depth:19 #> name:identifier_r_1;value:Z;pos:-2;depth:20 #> name:identifier_r_1;value:Z;pos:0;depth:20 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Z;pos:-1;depth:21 #> name:multiplicative_expression;value:;pos:1;depth:15 #> name:multiplicative_expression__63;value:;pos:-1;depth:16 #> name:primary_expression;value:);pos:2;depth:11 #> name:);value:);pos:-1;depth:12 #> name:additive_expression;value:;pos:1;depth:5 #> name:additive_expression__59;value:;pos:-1;depth:6 #> name:statement;value:;;pos:1;depth:3 #> name:end_statement;value:;;pos:-2;depth:4 #> name:end_statement;value:;;pos:0;depth:4 #> name:end_statement__36;value:;;pos:-2;depth:5 #> name:end_statement__36;value:;;pos:0;depth:5 #> name:end_statement__35;value:;;pos:-2;depth:6 #> name:end_statement__35;value:;;pos:0;depth:6 #> name:;;value:;;pos:-1;depth:7 #> name:statement_list__3;value:d/dt(Z) = -X*Y + c*Y - Z #> ;pos:3;depth:1 #> name:statement_list__2;value:d/dt(Z) = -X*Y + c*Y - Z #> ;pos:-2;depth:2 #> name:statement_list__2;value:d/dt(Z) = -X*Y + c*Y - Z #> ;pos:0;depth:2 #> name:statement;value:d/dt(Z) = -X*Y + c*Y - Z #> ;pos:-2;depth:3 #> name:statement;value:d/dt(Z) = -X*Y + c*Y - Z #> ;pos:0;depth:3 #> name:derivative;value:d/dt(Z) = -X*Y + c*Y - Z #> ;pos:-2;depth:4 #> name:derivative;value:d/dt;pos:0;depth:4 #> name:d/dt;value:d/dt;pos:-1;depth:5 #> name:derivative;value:(;pos:1;depth:4 #> name:(;value:(;pos:-1;depth:5 #> name:derivative;value:Z;pos:2;depth:4 #> name:identifier_r_no_output;value:Z;pos:-2;depth:5 #> name:identifier_r_no_output;value:Z;pos:0;depth:5 #> name:identifier_r_no_output_1;value:Z;pos:-2;depth:6 #> name:identifier_r_no_output_1;value:Z;pos:0;depth:6 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Z;pos:-1;depth:7 #> name:derivative;value:);pos:3;depth:4 #> name:);value:);pos:-1;depth:5 #> name:derivative;value:=;pos:4;depth:4 #> name:derivative__23;value:=;pos:-2;depth:5 #> name:derivative__23;value:=;pos:0;depth:5 #> name:=;value:=;pos:-1;depth:6 #> name:derivative;value:-X*Y + c*Y - Z #> ;pos:5;depth:4 #> name:additive_expression;value:-X*Y + c*Y - Z #> ;pos:-2;depth:5 #> name:additive_expression;value:-X*Y;pos:0;depth:5 #> name:multiplicative_expression;value:-X*Y;pos:-2;depth:6 #> name:multiplicative_expression;value:-X;pos:0;depth:6 #> name:unary_expression;value:-X;pos:-2;depth:7 #> name:unary_expression;value:-;pos:0;depth:7 #> name:unary_expression__66;value:-;pos:-2;depth:8 #> name:unary_expression__66;value:-;pos:0;depth:8 #> name:unary_expression__65;value:-;pos:-2;depth:9 #> name:unary_expression__65;value:-;pos:0;depth:9 #> name:-;value:-;pos:-1;depth:10 #> name:unary_expression;value:X;pos:1;depth:7 #> name:unary_expression__67;value:X;pos:-2;depth:8 #> name:unary_expression__67;value:X;pos:0;depth:8 #> name:primary_expression;value:X;pos:-2;depth:9 #> name:primary_expression;value:X;pos:0;depth:9 #> name:identifier_r;value:X;pos:-2;depth:10 #> name:identifier_r;value:X;pos:0;depth:10 #> name:identifier_r_1;value:X;pos:-2;depth:11 #> name:identifier_r_1;value:X;pos:0;depth:11 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:X;pos:-1;depth:12 #> name:multiplicative_expression;value:*Y;pos:1;depth:6 #> name:multiplicative_expression__63;value:*Y;pos:-2;depth:7 #> name:multiplicative_expression__63;value:*Y;pos:0;depth:7 #> name:multiplicative_expression__61;value:*Y;pos:-2;depth:8 #> name:multiplicative_expression__61;value:*;pos:0;depth:8 #> name:multiplicative_expression__61__62;value:*;pos:-2;depth:9 #> name:multiplicative_expression__61__62;value:*;pos:0;depth:9 #> name:*;value:*;pos:-1;depth:10 #> name:multiplicative_expression__61;value:Y;pos:1;depth:8 #> name:unary_expression;value:Y;pos:-2;depth:9 #> name:unary_expression;value:;pos:0;depth:9 #> name:unary_expression__66;value:;pos:-1;depth:10 #> name:unary_expression;value:Y;pos:1;depth:9 #> name:unary_expression__67;value:Y;pos:-2;depth:10 #> name:unary_expression__67;value:Y;pos:0;depth:10 #> name:primary_expression;value:Y;pos:-2;depth:11 #> name:primary_expression;value:Y;pos:0;depth:11 #> name:identifier_r;value:Y;pos:-2;depth:12 #> name:identifier_r;value:Y;pos:0;depth:12 #> name:identifier_r_1;value:Y;pos:-2;depth:13 #> name:identifier_r_1;value:Y;pos:0;depth:13 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Y;pos:-1;depth:14 #> name:additive_expression;value:+ c*Y - Z #> ;pos:1;depth:5 #> name:additive_expression__59;value:+ c*Y - Z #> ;pos:-2;depth:6 #> name:additive_expression__59;value:+ c*Y;pos:0;depth:6 #> name:additive_expression__57;value:+ c*Y;pos:-2;depth:7 #> name:additive_expression__57;value:+;pos:0;depth:7 #> name:additive_expression__57__58;value:+;pos:-2;depth:8 #> name:additive_expression__57__58;value:+;pos:0;depth:8 #> name:+;value:+;pos:-1;depth:9 #> name:additive_expression__57;value:c*Y;pos:1;depth:7 #> name:multiplicative_expression;value:c*Y;pos:-2;depth:8 #> name:multiplicative_expression;value:c;pos:0;depth:8 #> name:unary_expression;value:c;pos:-2;depth:9 #> name:unary_expression;value:;pos:0;depth:9 #> name:unary_expression__66;value:;pos:-1;depth:10 #> name:unary_expression;value:c;pos:1;depth:9 #> name:unary_expression__67;value:c;pos:-2;depth:10 #> name:unary_expression__67;value:c;pos:0;depth:10 #> name:primary_expression;value:c;pos:-2;depth:11 #> name:primary_expression;value:c;pos:0;depth:11 #> name:identifier_r;value:c;pos:-2;depth:12 #> name:identifier_r;value:c;pos:0;depth:12 #> name:identifier_r_1;value:c;pos:-2;depth:13 #> name:identifier_r_1;value:c;pos:0;depth:13 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:c;pos:-1;depth:14 #> name:multiplicative_expression;value:*Y;pos:1;depth:8 #> name:multiplicative_expression__63;value:*Y;pos:-2;depth:9 #> name:multiplicative_expression__63;value:*Y;pos:0;depth:9 #> name:multiplicative_expression__61;value:*Y;pos:-2;depth:10 #> name:multiplicative_expression__61;value:*;pos:0;depth:10 #> name:multiplicative_expression__61__62;value:*;pos:-2;depth:11 #> name:multiplicative_expression__61__62;value:*;pos:0;depth:11 #> name:*;value:*;pos:-1;depth:12 #> name:multiplicative_expression__61;value:Y;pos:1;depth:10 #> name:unary_expression;value:Y;pos:-2;depth:11 #> name:unary_expression;value:;pos:0;depth:11 #> name:unary_expression__66;value:;pos:-1;depth:12 #> name:unary_expression;value:Y;pos:1;depth:11 #> name:unary_expression__67;value:Y;pos:-2;depth:12 #> name:unary_expression__67;value:Y;pos:0;depth:12 #> name:primary_expression;value:Y;pos:-2;depth:13 #> name:primary_expression;value:Y;pos:0;depth:13 #> name:identifier_r;value:Y;pos:-2;depth:14 #> name:identifier_r;value:Y;pos:0;depth:14 #> name:identifier_r_1;value:Y;pos:-2;depth:15 #> name:identifier_r_1;value:Y;pos:0;depth:15 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Y;pos:-1;depth:16 #> name:additive_expression__59;value:- Z #> ;pos:1;depth:6 #> name:additive_expression__57;value:- Z #> ;pos:-2;depth:7 #> name:additive_expression__57;value:-;pos:0;depth:7 #> name:additive_expression__57__58;value:-;pos:-2;depth:8 #> name:additive_expression__57__58;value:-;pos:0;depth:8 #> name:-;value:-;pos:-1;depth:9 #> name:additive_expression__57;value:Z #> ;pos:1;depth:7 #> name:multiplicative_expression;value:Z #> ;pos:-2;depth:8 #> name:multiplicative_expression;value:Z;pos:0;depth:8 #> name:unary_expression;value:Z;pos:-2;depth:9 #> name:unary_expression;value:;pos:0;depth:9 #> name:unary_expression__66;value:;pos:-1;depth:10 #> name:unary_expression;value:Z;pos:1;depth:9 #> name:unary_expression__67;value:Z;pos:-2;depth:10 #> name:unary_expression__67;value:Z;pos:0;depth:10 #> name:primary_expression;value:Z;pos:-2;depth:11 #> name:primary_expression;value:Z;pos:0;depth:11 #> name:identifier_r;value:Z;pos:-2;depth:12 #> name:identifier_r;value:Z;pos:0;depth:12 #> name:identifier_r_1;value:Z;pos:-2;depth:13 #> name:identifier_r_1;value:Z;pos:0;depth:13 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:Z;pos:-1;depth:14 #> name:multiplicative_expression;value:;pos:1;depth:8 #> name:multiplicative_expression__63;value:;pos:-1;depth:9 #> name:statement;value:;pos:1;depth:3 #> name:end_statement;value:;pos:-2;depth:4 #> name:end_statement;value:;pos:0;depth:4 #> name:end_statement__36;value:;pos:-1;depth:5 #> name:statement_list__3;value:if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:4;depth:1 #> name:statement_list__2;value:if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:-2;depth:2 #> name:statement_list__2;value:if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:0;depth:2 #> name:statement;value:if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:-2;depth:3 #> name:statement;value:if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:0;depth:3 #> name:selection_statement;value:if (t < 0.02 | t > 99.98){ #> print #> } #> ;pos:-2;depth:4 #> name:selection_statement;value:if;pos:0;depth:4 #> name:if;value:if;pos:-1;depth:5 #> name:selection_statement;value:(;pos:1;depth:4 #> name:(;value:(;pos:-1;depth:5 #> name:selection_statement;value:t < 0.02 | t > 99.98;pos:2;depth:4 #> name:logical_or_expression;value:t < 0.02 | t > 99.98;pos:-2;depth:5 #> name:logical_or_expression;value:t < 0.02 ;pos:0;depth:5 #> name:logical_and_expression;value:t < 0.02 ;pos:-2;depth:6 #> name:logical_and_expression;value:t < 0.02 ;pos:0;depth:6 #> name:equality_expression0;value:t < 0.02 ;pos:-2;depth:7 #> name:equality_expression0;value:t < 0.02 ;pos:0;depth:7 #> name:equality_expression;value:t < 0.02 ;pos:-2;depth:8 #> name:equality_expression;value:t < 0.02 ;pos:0;depth:8 #> name:relational_expression;value:t < 0.02 ;pos:-2;depth:9 #> name:relational_expression;value:t ;pos:0;depth:9 #> name:additive_expression;value:t ;pos:-2;depth:10 #> name:additive_expression;value:t ;pos:0;depth:10 #> name:multiplicative_expression;value:t ;pos:-2;depth:11 #> name:multiplicative_expression;value:t;pos:0;depth:11 #> name:unary_expression;value:t;pos:-2;depth:12 #> name:unary_expression;value:;pos:0;depth:12 #> name:unary_expression__66;value:;pos:-1;depth:13 #> name:unary_expression;value:t;pos:1;depth:12 #> name:unary_expression__67;value:t;pos:-2;depth:13 #> name:unary_expression__67;value:t;pos:0;depth:13 #> name:primary_expression;value:t;pos:-2;depth:14 #> name:primary_expression;value:t;pos:0;depth:14 #> name:identifier_r;value:t;pos:-2;depth:15 #> name:identifier_r;value:t;pos:0;depth:15 #> name:identifier_r_1;value:t;pos:-2;depth:16 #> name:identifier_r_1;value:t;pos:0;depth:16 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:t;pos:-1;depth:17 #> name:multiplicative_expression;value:;pos:1;depth:11 #> name:multiplicative_expression__63;value:;pos:-1;depth:12 #> name:additive_expression;value:;pos:1;depth:10 #> name:additive_expression__59;value:;pos:-1;depth:11 #> name:relational_expression;value:< 0.02 ;pos:1;depth:9 #> name:relational_expression__55;value:< 0.02 ;pos:-2;depth:10 #> name:relational_expression__55;value:< 0.02 ;pos:0;depth:10 #> name:relational_expression__53;value:< 0.02 ;pos:-2;depth:11 #> name:relational_expression__53;value:<;pos:0;depth:11 #> name:relational_expression__53__54;value:<;pos:-2;depth:12 #> name:relational_expression__53__54;value:<;pos:0;depth:12 #> name:<;value:<;pos:-1;depth:13 #> name:relational_expression__53;value:0.02 ;pos:1;depth:11 #> name:additive_expression;value:0.02 ;pos:-2;depth:12 #> name:additive_expression;value:0.02 ;pos:0;depth:12 #> name:multiplicative_expression;value:0.02 ;pos:-2;depth:13 #> name:multiplicative_expression;value:0.02;pos:0;depth:13 #> name:unary_expression;value:0.02;pos:-2;depth:14 #> name:unary_expression;value:;pos:0;depth:14 #> name:unary_expression__66;value:;pos:-1;depth:15 #> name:unary_expression;value:0.02;pos:1;depth:14 #> name:unary_expression__67;value:0.02;pos:-2;depth:15 #> name:unary_expression__67;value:0.02;pos:0;depth:15 #> name:primary_expression;value:0.02;pos:-2;depth:16 #> name:primary_expression;value:0.02;pos:0;depth:16 #> name:constant;value:0.02;pos:-2;depth:17 #> name:constant;value:0.02;pos:0;depth:17 #> name:float1;value:0.02;pos:-2;depth:18 #> name:float1;value:0.02;pos:0;depth:18 #> name:([0-9]+.[0-9]*|[0-9]*.[0-9]+)([eE][\-\+]?[0-9]+)?;value:0.02;pos:-1;depth:19 #> name:multiplicative_expression;value:;pos:1;depth:13 #> name:multiplicative_expression__63;value:;pos:-1;depth:14 #> name:additive_expression;value:;pos:1;depth:12 #> name:additive_expression__59;value:;pos:-1;depth:13 #> name:equality_expression;value:;pos:1;depth:8 #> name:equality_expression__51;value:;pos:-1;depth:9 #> name:logical_and_expression;value:;pos:1;depth:6 #> name:logical_and_expression__46;value:;pos:-1;depth:7 #> name:logical_or_expression;value:| t > 99.98;pos:1;depth:5 #> name:logical_or_expression__42;value:| t > 99.98;pos:-2;depth:6 #> name:logical_or_expression__42;value:| t > 99.98;pos:0;depth:6 #> name:logical_or_expression__40;value:| t > 99.98;pos:-2;depth:7 #> name:logical_or_expression__40;value:|;pos:0;depth:7 #> name:logical_or_expression__40__41;value:|;pos:-2;depth:8 #> name:logical_or_expression__40__41;value:|;pos:0;depth:8 #> name:|;value:|;pos:-1;depth:9 #> name:logical_or_expression__40;value:t > 99.98;pos:1;depth:7 #> name:logical_and_expression;value:t > 99.98;pos:-2;depth:8 #> name:logical_and_expression;value:t > 99.98;pos:0;depth:8 #> name:equality_expression0;value:t > 99.98;pos:-2;depth:9 #> name:equality_expression0;value:t > 99.98;pos:0;depth:9 #> name:equality_expression;value:t > 99.98;pos:-2;depth:10 #> name:equality_expression;value:t > 99.98;pos:0;depth:10 #> name:relational_expression;value:t > 99.98;pos:-2;depth:11 #> name:relational_expression;value:t ;pos:0;depth:11 #> name:additive_expression;value:t ;pos:-2;depth:12 #> name:additive_expression;value:t ;pos:0;depth:12 #> name:multiplicative_expression;value:t ;pos:-2;depth:13 #> name:multiplicative_expression;value:t;pos:0;depth:13 #> name:unary_expression;value:t;pos:-2;depth:14 #> name:unary_expression;value:;pos:0;depth:14 #> name:unary_expression__66;value:;pos:-1;depth:15 #> name:unary_expression;value:t;pos:1;depth:14 #> name:unary_expression__67;value:t;pos:-2;depth:15 #> name:unary_expression__67;value:t;pos:0;depth:15 #> name:primary_expression;value:t;pos:-2;depth:16 #> name:primary_expression;value:t;pos:0;depth:16 #> name:identifier_r;value:t;pos:-2;depth:17 #> name:identifier_r;value:t;pos:0;depth:17 #> name:identifier_r_1;value:t;pos:-2;depth:18 #> name:identifier_r_1;value:t;pos:0;depth:18 #> name:[a-zA-Z_][a-zA-Z0-9_.]*;value:t;pos:-1;depth:19 #> name:multiplicative_expression;value:;pos:1;depth:13 #> name:multiplicative_expression__63;value:;pos:-1;depth:14 #> name:additive_expression;value:;pos:1;depth:12 #> name:additive_expression__59;value:;pos:-1;depth:13 #> name:relational_expression;value:> 99.98;pos:1;depth:11 #> name:relational_expression__55;value:> 99.98;pos:-2;depth:12 #> name:relational_expression__55;value:> 99.98;pos:0;depth:12 #> name:relational_expression__53;value:> 99.98;pos:-2;depth:13 #> name:relational_expression__53;value:>;pos:0;depth:13 #> name:relational_expression__53__54;value:>;pos:-2;depth:14 #> name:relational_expression__53__54;value:>;pos:0;depth:14 #> name:>;value:>;pos:-1;depth:15 #> name:relational_expression__53;value:99.98;pos:1;depth:13 #> name:additive_expression;value:99.98;pos:-2;depth:14 #> name:additive_expression;value:99.98;pos:0;depth:14 #> name:multiplicative_expression;value:99.98;pos:-2;depth:15 #> name:multiplicative_expression;value:99.98;pos:0;depth:15 #> name:unary_expression;value:99.98;pos:-2;depth:16 #> name:unary_expression;value:;pos:0;depth:16 #> name:unary_expression__66;value:;pos:-1;depth:17 #> name:unary_expression;value:99.98;pos:1;depth:16 #> name:unary_expression__67;value:99.98;pos:-2;depth:17 #> name:unary_expression__67;value:99.98;pos:0;depth:17 #> name:primary_expression;value:99.98;pos:-2;depth:18 #> name:primary_expression;value:99.98;pos:0;depth:18 #> name:constant;value:99.98;pos:-2;depth:19 #> name:constant;value:99.98;pos:0;depth:19 #> name:float1;value:99.98;pos:-2;depth:20 #> name:float1;value:99.98;pos:0;depth:20 #> name:([0-9]+.[0-9]*|[0-9]*.[0-9]+)([eE][\-\+]?[0-9]+)?;value:99.98;pos:-1;depth:21 #> name:multiplicative_expression;value:;pos:1;depth:15 #> name:multiplicative_expression__63;value:;pos:-1;depth:16 #> name:additive_expression;value:;pos:1;depth:14 #> name:additive_expression__59;value:;pos:-1;depth:15 #> name:equality_expression;value:;pos:1;depth:10 #> name:equality_expression__51;value:;pos:-1;depth:11 #> name:logical_and_expression;value:;pos:1;depth:8 #> name:logical_and_expression__46;value:;pos:-1;depth:9 #> name:selection_statement;value:);pos:3;depth:4 #> name:);value:);pos:-1;depth:5 #> name:selection_statement;value:{ #> print #> };pos:4;depth:4 #> name:statement;value:{ #> print #> };pos:-2;depth:5 #> name:statement;value:{ #> print #> };pos:0;depth:5 #> name:compound_statement;value:{ #> print #> };pos:-2;depth:6 #> name:compound_statement;value:{;pos:0;depth:6 #> name:{;value:{;pos:-1;depth:7 #> name:compound_statement;value:print #> ;pos:1;depth:6 #> name:compound_statement__6;value:print #> ;pos:-2;depth:7 #> name:compound_statement__6;value:print #> ;pos:0;depth:7 #> name:statement_list;value:print #> ;pos:-2;depth:8 #> name:statement_list;value:print #> ;pos:0;depth:8 #> name:statement_list__3;value:print #> ;pos:-2;depth:9 #> name:statement_list__3;value:print #> ;pos:0;depth:9 #> name:statement_list__2;value:print #> ;pos:-2;depth:10 #> name:statement_list__2;value:print #> ;pos:0;depth:10 #> name:statement;value:print #> ;pos:-2;depth:11 #> name:statement;value:print;pos:0;depth:11 #> name:print_command;value:print;pos:-2;depth:12 #> name:print_command;value:print;pos:0;depth:12 #> name:print;value:print;pos:-1;depth:13 #> name:statement;value:;pos:1;depth:11 #> name:end_statement;value:;pos:-2;depth:12 #> name:end_statement;value:;pos:0;depth:12 #> name:end_statement__36;value:;pos:-1;depth:13 #> name:compound_statement;value:};pos:2;depth:6 #> name:};value:};pos:-1;depth:7 #> name:selection_statement;value:;pos:5;depth:4 #> name:selection_statement__9;value:;pos:-1;depth:5## You could use a better R parsing function; You could also use ## this as a starting place for your own C-based parser # }