ExprParser

example of an expression parser. expr -> term { + term } term -> factor { * factor } factor -> number | ( expr )

static

class ExprParser {

Parser!(immutable(char)) lazyExpr();

Parser!(immutable(char)) expr();

Parser!(immutable(char)) term();

Parser!(immutable(char)) factor();

}

Members

Functions

expr Parser!(immutable(char)) expr(): Undocumented in source. Be warned that the author may not have intended to support it.
factor Parser!(immutable(char)) factor(): Undocumented in source. Be warned that the author may not have intended to support it.
lazyExpr Parser!(immutable(char)) lazyExpr(): Undocumented in source. Be warned that the author may not have intended to support it.
term Parser!(immutable(char)) term(): Undocumented in source. Be warned that the author may not have intended to support it.

Examples

a simple expression parser

import unit_threaded;

auto parser = new ExprParser;
auto p = parser.expr();
auto res = p.parse("1+2*3");
res.success.shouldBeTrue;
res.results[0].get!double.shouldEqual(7);

res = p.parse("(1+2)*3");
res.success.shouldBeTrue;
res.results[0].get!double.shouldEqual(9);

ExprParser

Members

Functions

Examples

Meta

Source