|
|
#include "catch.hh"
|
|
|
#include <peglib.h>
|
|
|
|
|
|
using namespace peg;
|
|
|
|
|
|
TEST_CASE("Token boundary 1", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- 'a' 'b' 'c'
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Token boundary 2", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- < 'a' 'b' 'c' >
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Token boundary 3", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- < 'a' B 'c' >
|
|
|
B <- 'b'
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Token boundary 4", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- < A 'b' 'c' >
|
|
|
A <- 'a'
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Token boundary 5", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- A < 'b' C >
|
|
|
A <- 'a'
|
|
|
C <- 'c'
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Token boundary 6", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- < A > B C
|
|
|
A <- 'a'
|
|
|
B <- 'b'
|
|
|
C <- 'c'
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Token boundary 7", "[token boundary]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- TOP
|
|
|
TOP <- < A B C >
|
|
|
A <- 'a'
|
|
|
B <- 'b'
|
|
|
C <- 'c'
|
|
|
%whitespace <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg.parse(" a b c "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 1", "[infinite loop]")
|
|
|
{
|
|
|
parser pg(R"(
|
|
|
ROOT <- WH TOKEN* WH
|
|
|
TOKEN <- [a-z0-9]*
|
|
|
WH <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 2", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
ROOT <- WH TOKEN+ WH
|
|
|
TOKEN <- [a-z0-9]*
|
|
|
WH <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 3", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
ROOT <- WH TOKEN* WH
|
|
|
TOKEN <- !'word1'
|
|
|
WH <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 4", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
ROOT <- WH TOKEN* WH
|
|
|
TOKEN <- &'word1'
|
|
|
WH <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 5", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
Numbers <- Number*
|
|
|
Number <- [0-9]+ / Spacing
|
|
|
Spacing <- ' ' / '\t' / '\n' / EOF # EOF is empty
|
|
|
EOF <- !.
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 6", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
S <- ''*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Infinite loop 7", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
S <- A*
|
|
|
A <- ''
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!pg);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Not infinite 1", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
Numbers <- Number* EOF
|
|
|
Number <- [0-9]+ / Spacing
|
|
|
Spacing <- ' ' / '\t' / '\n'
|
|
|
EOF <- !.
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!!pg); // OK
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Not infinite 2", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
ROOT <- _ ('[' TAG_NAME ']' _)*
|
|
|
# In a sequence operator, if there is at least one non-empty element, we can treat it as non-empty
|
|
|
TAG_NAME <- (!']' .)+
|
|
|
_ <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!!pg); // OK
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Not infinite 3", "[infinite loop]") {
|
|
|
parser pg(R"(
|
|
|
EXPRESSION <- _ TERM (TERM_OPERATOR TERM)*
|
|
|
TERM <- FACTOR (FACTOR_OPERATOR FACTOR)*
|
|
|
FACTOR <- NUMBER / '(' _ EXPRESSION ')' _ # Recursive...
|
|
|
TERM_OPERATOR <- < [-+] > _
|
|
|
FACTOR_OPERATOR <- < [/*] > _
|
|
|
NUMBER <- < [0-9]+ > _
|
|
|
_ <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!!pg); // OK
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Precedence climbing", "[precedence]") {
|
|
|
parser parser(R"(
|
|
|
START <- _ EXPRESSION
|
|
|
EXPRESSION <- ATOM (OPERATOR ATOM)* {
|
|
|
precedence
|
|
|
L + -
|
|
|
L * /
|
|
|
}
|
|
|
ATOM <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
OPERATOR <- T([-+/*])
|
|
|
NUMBER <- T('-'? [0-9]+)
|
|
|
~_ <- [ \t]*
|
|
|
T(S) <- < S > _
|
|
|
)");
|
|
|
|
|
|
parser.enable_packrat_parsing();
|
|
|
|
|
|
// Setup actions
|
|
|
parser["EXPRESSION"] = [](const SemanticValues &vs) -> long {
|
|
|
auto result = std::any_cast<long>(vs[0]);
|
|
|
if (vs.size() > 1) {
|
|
|
auto ope = std::any_cast<char>(vs[1]);
|
|
|
auto num = std::any_cast<long>(vs[2]);
|
|
|
switch (ope) {
|
|
|
case '+': result += num; break;
|
|
|
case '-': result -= num; break;
|
|
|
case '*': result *= num; break;
|
|
|
case '/': result /= num; break;
|
|
|
}
|
|
|
}
|
|
|
return result;
|
|
|
};
|
|
|
parser["OPERATOR"] = [](const SemanticValues &vs) { return *vs.sv().data(); };
|
|
|
parser["NUMBER"] = [](const SemanticValues &vs) { return vs.token_to_number<long>(); };
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
{
|
|
|
auto expr = " 1 + 2 * 3 * (4 - 5 + 6) / 7 - 8 ";
|
|
|
long val = 0;
|
|
|
ret = parser.parse(expr, val);
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(val == -3);
|
|
|
}
|
|
|
|
|
|
{
|
|
|
auto expr = "-1+-2--3"; // -1 + -2 - -3 = 0
|
|
|
long val = 0;
|
|
|
ret = parser.parse(expr, val);
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(val == 0);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Precedence climbing with macro", "[precedence]") {
|
|
|
// Create a PEG parser
|
|
|
parser parser(R"(
|
|
|
EXPRESSION <- INFIX_EXPRESSION(ATOM, OPERATOR)
|
|
|
INFIX_EXPRESSION(A, O) <- A (O A)* {
|
|
|
precedence
|
|
|
L + -
|
|
|
L * /
|
|
|
}
|
|
|
ATOM <- NUMBER / '(' EXPRESSION ')'
|
|
|
OPERATOR <- < [-+/*] >
|
|
|
NUMBER <- < '-'? [0-9]+ >
|
|
|
%whitespace <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
parser.enable_packrat_parsing();
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
// Setup actions
|
|
|
parser["INFIX_EXPRESSION"] = [](const SemanticValues &vs) -> long {
|
|
|
auto result = std::any_cast<long>(vs[0]);
|
|
|
if (vs.size() > 1) {
|
|
|
auto ope = std::any_cast<char>(vs[1]);
|
|
|
auto num = std::any_cast<long>(vs[2]);
|
|
|
switch (ope) {
|
|
|
case '+': result += num; break;
|
|
|
case '-': result -= num; break;
|
|
|
case '*': result *= num; break;
|
|
|
case '/': result /= num; break;
|
|
|
}
|
|
|
}
|
|
|
return result;
|
|
|
};
|
|
|
parser["OPERATOR"] = [](const SemanticValues &vs) { return *vs.sv().data(); };
|
|
|
parser["NUMBER"] = [](const SemanticValues &vs) { return vs.token_to_number<long>(); };
|
|
|
|
|
|
{
|
|
|
auto expr = " 1 + 2 * 3 * (4 - 5 + 6) / 7 - 8 ";
|
|
|
long val = 0;
|
|
|
ret = parser.parse(expr, val);
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(val == -3);
|
|
|
}
|
|
|
|
|
|
{
|
|
|
auto expr = "-1+-2--3"; // -1 + -2 - -3 = 0
|
|
|
long val = 0;
|
|
|
ret = parser.parse(expr, val);
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(val == 0);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Precedence climbing error1", "[precedence]") {
|
|
|
parser parser(R"(
|
|
|
START <- _ EXPRESSION
|
|
|
EXPRESSION <- ATOM (OPERATOR ATOM1)* {
|
|
|
precedence
|
|
|
L + -
|
|
|
L * /
|
|
|
}
|
|
|
ATOM <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
ATOM1 <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
OPERATOR <- T([-+/*])
|
|
|
NUMBER <- T('-'? [0-9]+)
|
|
|
~_ <- [ \t]*
|
|
|
T(S) <- < S > _
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Precedence climbing error2", "[precedence]") {
|
|
|
parser parser(R"(
|
|
|
START <- _ EXPRESSION
|
|
|
EXPRESSION <- ATOM OPERATOR ATOM {
|
|
|
precedence
|
|
|
L + -
|
|
|
L * /
|
|
|
}
|
|
|
ATOM <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
OPERATOR <- T([-+/*])
|
|
|
NUMBER <- T('-'? [0-9]+)
|
|
|
~_ <- [ \t]*
|
|
|
T(S) <- < S > _
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Precedence climbing error3", "[precedence]") {
|
|
|
parser parser(R"(
|
|
|
EXPRESSION <- PRECEDENCE_PARSING(ATOM, OPERATOR)
|
|
|
PRECEDENCE_PARSING(A, O) <- A (O A)+ {
|
|
|
precedence
|
|
|
L + -
|
|
|
L * /
|
|
|
}
|
|
|
ATOM <- NUMBER / '(' EXPRESSION ')'
|
|
|
OPERATOR <- < [-+/*] >
|
|
|
NUMBER <- < '-'? [0-9]+ >
|
|
|
%whitespace <- [ \t]*
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Packrat parser test with %whitespace%", "[packrat]") {
|
|
|
peg::parser parser(R"(
|
|
|
ROOT <- 'a'
|
|
|
%whitespace <- SPACE*
|
|
|
SPACE <- ' '
|
|
|
)");
|
|
|
|
|
|
parser.enable_packrat_parsing();
|
|
|
|
|
|
auto ret = parser.parse("a");
|
|
|
REQUIRE(ret == true);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Packrat parser test with macro", "[packrat]") {
|
|
|
parser parser(R"(
|
|
|
EXPRESSION <- _ LIST(TERM, TERM_OPERATOR)
|
|
|
TERM <- LIST(FACTOR, FACTOR_OPERATOR)
|
|
|
FACTOR <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
TERM_OPERATOR <- T([-+])
|
|
|
FACTOR_OPERATOR <- T([/*])
|
|
|
NUMBER <- T([0-9]+)
|
|
|
~_ <- [ \t]*
|
|
|
LIST(I, D) <- I (D I)*
|
|
|
T(S) <- < S > _
|
|
|
)");
|
|
|
|
|
|
parser.enable_packrat_parsing();
|
|
|
|
|
|
auto ret = parser.parse(" 1 + 2 * 3 * (4 - 5 + 6) / 7 - 8 ");
|
|
|
REQUIRE(ret == true);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Packrat parser test with precedence expression parser",
|
|
|
"[packrat]") {
|
|
|
peg::parser parser(R"(
|
|
|
Expression <- Atom (Operator Atom)* { precedence L + - L * / }
|
|
|
Atom <- _? Number _?
|
|
|
Number <- [0-9]+
|
|
|
Operator <- '+' / '-' / '*' / '/'
|
|
|
_ <- ' '+
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
parser.enable_packrat_parsing();
|
|
|
|
|
|
ret = parser.parse(" 1 + 2 * 3 ");
|
|
|
REQUIRE(ret == true);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Backreference test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
START <- _ LQUOTE < (!RQUOTE .)* > RQUOTE _
|
|
|
LQUOTE <- 'R"' $delm< [a-zA-Z]* > '('
|
|
|
RQUOTE <- ')' $delm '"'
|
|
|
~_ <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
std::string token;
|
|
|
parser["START"] = [&](const SemanticValues &vs) { token = vs.token(); };
|
|
|
|
|
|
{
|
|
|
token.clear();
|
|
|
auto ret = parser.parse(R"delm(
|
|
|
R"("hello world")"
|
|
|
)delm");
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(token == "\"hello world\"");
|
|
|
}
|
|
|
|
|
|
{
|
|
|
token.clear();
|
|
|
auto ret = parser.parse(R"delm(
|
|
|
R"foo("(hello world)")foo"
|
|
|
)delm");
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(token == "\"(hello world)\"");
|
|
|
}
|
|
|
|
|
|
{
|
|
|
token.clear();
|
|
|
auto ret = parser.parse(R"delm(
|
|
|
R"foo("(hello world)foo")foo"
|
|
|
)delm");
|
|
|
|
|
|
REQUIRE(ret == false);
|
|
|
REQUIRE(token == "\"(hello world");
|
|
|
}
|
|
|
|
|
|
{
|
|
|
token.clear();
|
|
|
auto ret = parser.parse(R"delm(
|
|
|
R"foo("(hello world)")bar"
|
|
|
)delm");
|
|
|
|
|
|
REQUIRE(ret == false);
|
|
|
REQUIRE(token.empty());
|
|
|
}
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Invalid backreference test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
START <- _ LQUOTE (!RQUOTE .)* RQUOTE _
|
|
|
LQUOTE <- 'R"' $delm< [a-zA-Z]* > '('
|
|
|
RQUOTE <- ')' $delm2 '"'
|
|
|
~_ <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE_THROWS_AS(parser.parse(R"delm(
|
|
|
R"foo("(hello world)")foo"
|
|
|
)delm"),
|
|
|
std::runtime_error);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Nested capture test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
ROOT <- CONTENT
|
|
|
CONTENT <- (ELEMENT / TEXT)*
|
|
|
ELEMENT <- $(STAG CONTENT ETAG)
|
|
|
STAG <- '<' $tag< TAG_NAME > '>'
|
|
|
ETAG <- '</' $tag '>'
|
|
|
TAG_NAME <- 'b' / 'u'
|
|
|
TEXT <- TEXT_DATA
|
|
|
TEXT_DATA <- ![<] .
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("This is <b>a <u>test</u> text</b>."));
|
|
|
REQUIRE(!parser.parse("This is <b>a <u>test</b> text</u>."));
|
|
|
REQUIRE(!parser.parse("This is <b>a <u>test text</b>."));
|
|
|
REQUIRE(!parser.parse("This is a <u>test</u> text</b>."));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Backreference with Prioritized Choice test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
TREE <- WRONG_BRANCH / CORRECT_BRANCH
|
|
|
WRONG_BRANCH <- BRANCH THAT IS_capture WRONG
|
|
|
CORRECT_BRANCH <- BRANCH THAT IS_backref CORRECT
|
|
|
BRANCH <- 'branch'
|
|
|
THAT <- 'that'
|
|
|
IS_capture <- $ref<..>
|
|
|
IS_backref <- $ref
|
|
|
WRONG <- 'wrong'
|
|
|
CORRECT <- 'correct'
|
|
|
)");
|
|
|
|
|
|
REQUIRE_THROWS_AS(parser.parse("branchthatiscorrect"), std::runtime_error);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Backreference with Zero or More test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
TREE <- WRONG_BRANCH* CORRECT_BRANCH
|
|
|
WRONG_BRANCH <- BRANCH THAT IS_capture WRONG
|
|
|
CORRECT_BRANCH <- BRANCH THAT IS_backref CORRECT
|
|
|
BRANCH <- 'branch'
|
|
|
THAT <- 'that'
|
|
|
IS_capture <- $ref<..>
|
|
|
IS_backref <- $ref
|
|
|
WRONG <- 'wrong'
|
|
|
CORRECT <- 'correct'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("branchthatiswrongbranchthatiscorrect"));
|
|
|
REQUIRE(!parser.parse("branchthatiswrongbranchthatIscorrect"));
|
|
|
REQUIRE(
|
|
|
!parser.parse("branchthatiswrongbranchthatIswrongbranchthatiscorrect"));
|
|
|
REQUIRE(
|
|
|
parser.parse("branchthatiswrongbranchthatIswrongbranchthatIscorrect"));
|
|
|
REQUIRE_THROWS_AS(parser.parse("branchthatiscorrect"), std::runtime_error);
|
|
|
REQUIRE_THROWS_AS(parser.parse("branchthatiswron_branchthatiscorrect"),
|
|
|
std::runtime_error);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Backreference with One or More test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
TREE <- WRONG_BRANCH+ CORRECT_BRANCH
|
|
|
WRONG_BRANCH <- BRANCH THAT IS_capture WRONG
|
|
|
CORRECT_BRANCH <- BRANCH THAT IS_backref CORRECT
|
|
|
BRANCH <- 'branch'
|
|
|
THAT <- 'that'
|
|
|
IS_capture <- $ref<..>
|
|
|
IS_backref <- $ref
|
|
|
WRONG <- 'wrong'
|
|
|
CORRECT <- 'correct'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("branchthatiswrongbranchthatiscorrect"));
|
|
|
REQUIRE(!parser.parse("branchthatiswrongbranchthatIscorrect"));
|
|
|
REQUIRE(
|
|
|
!parser.parse("branchthatiswrongbranchthatIswrongbranchthatiscorrect"));
|
|
|
REQUIRE(
|
|
|
parser.parse("branchthatiswrongbranchthatIswrongbranchthatIscorrect"));
|
|
|
REQUIRE(!parser.parse("branchthatiscorrect"));
|
|
|
REQUIRE(!parser.parse("branchthatiswron_branchthatiscorrect"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Backreference with Option test", "[backreference]") {
|
|
|
parser parser(R"(
|
|
|
TREE <- WRONG_BRANCH? CORRECT_BRANCH
|
|
|
WRONG_BRANCH <- BRANCH THAT IS_capture WRONG
|
|
|
CORRECT_BRANCH <- BRANCH THAT IS_backref CORRECT
|
|
|
BRANCH <- 'branch'
|
|
|
THAT <- 'that'
|
|
|
IS_capture <- $ref<..>
|
|
|
IS_backref <- $ref
|
|
|
WRONG <- 'wrong'
|
|
|
CORRECT <- 'correct'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("branchthatiswrongbranchthatiscorrect"));
|
|
|
REQUIRE(!parser.parse("branchthatiswrongbranchthatIscorrect"));
|
|
|
REQUIRE(
|
|
|
!parser.parse("branchthatiswrongbranchthatIswrongbranchthatiscorrect"));
|
|
|
REQUIRE(
|
|
|
!parser.parse("branchthatiswrongbranchthatIswrongbranchthatIscorrect"));
|
|
|
REQUIRE_THROWS_AS(parser.parse("branchthatiscorrect"), std::runtime_error);
|
|
|
REQUIRE_THROWS_AS(parser.parse("branchthatiswron_branchthatiscorrect"),
|
|
|
std::runtime_error);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Repetition {0}", "[repetition]") {
|
|
|
parser parser(R"(
|
|
|
START <- '(' DIGIT{3} ') ' DIGIT{3} '-' DIGIT{4}
|
|
|
DIGIT <- [0-9]
|
|
|
)");
|
|
|
REQUIRE(parser.parse("(123) 456-7890"));
|
|
|
REQUIRE(!parser.parse("(12a) 456-7890"));
|
|
|
REQUIRE(!parser.parse("(123) 45-7890"));
|
|
|
REQUIRE(!parser.parse("(123) 45-7a90"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Repetition {2,4}", "[repetition]") {
|
|
|
parser parser(R"(
|
|
|
START <- DIGIT{2,4}
|
|
|
DIGIT <- [0-9]
|
|
|
)");
|
|
|
REQUIRE(!parser.parse("1"));
|
|
|
REQUIRE(parser.parse("12"));
|
|
|
REQUIRE(parser.parse("123"));
|
|
|
REQUIRE(parser.parse("1234"));
|
|
|
REQUIRE(!parser.parse("12345"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Repetition {2,1}", "[repetition]") {
|
|
|
parser parser(R"(
|
|
|
START <- DIGIT{2,1} # invalid range
|
|
|
DIGIT <- [0-9]
|
|
|
)");
|
|
|
REQUIRE(!parser.parse("1"));
|
|
|
REQUIRE(parser.parse("12"));
|
|
|
REQUIRE(!parser.parse("123"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Repetition {2,}", "[repetition]") {
|
|
|
parser parser(R"(
|
|
|
START <- DIGIT{2,}
|
|
|
DIGIT <- [0-9]
|
|
|
)");
|
|
|
REQUIRE(!parser.parse("1"));
|
|
|
REQUIRE(parser.parse("12"));
|
|
|
REQUIRE(parser.parse("123"));
|
|
|
REQUIRE(parser.parse("1234"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Repetition {,2}", "[repetition]") {
|
|
|
parser parser(R"(
|
|
|
START <- DIGIT{,2}
|
|
|
DIGIT <- [0-9]
|
|
|
)");
|
|
|
REQUIRE(parser.parse("1"));
|
|
|
REQUIRE(parser.parse("12"));
|
|
|
REQUIRE(!parser.parse("123"));
|
|
|
REQUIRE(!parser.parse("1234"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Left recursive test", "[left recursive]") {
|
|
|
parser parser(R"(
|
|
|
A <- A 'a'
|
|
|
B <- A 'a'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!parser);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Left recursive with option test", "[left recursive]") {
|
|
|
parser parser(R"(
|
|
|
A <- 'a' / 'b'? B 'c'
|
|
|
B <- A
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!parser);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Left recursive with zom test", "[left recursive]") {
|
|
|
parser parser(R"(
|
|
|
A <- 'a'* A*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!parser);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Left recursive with a ZOM content rule", "[left recursive]") {
|
|
|
parser parser(R"(
|
|
|
A <- B
|
|
|
B <- _ A
|
|
|
_ <- ' '* # Zero or more
|
|
|
)");
|
|
|
|
|
|
REQUIRE(!parser);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Left recursive with empty string test", "[left recursive]") {
|
|
|
parser parser(" A <- '' A");
|
|
|
|
|
|
REQUIRE(!parser);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("User defined rule test", "[user rule]") {
|
|
|
auto g = parser(R"(
|
|
|
ROOT <- _ 'Hello' _ NAME '!' _
|
|
|
)",
|
|
|
{{"NAME", usr([](const char *s, size_t n, SemanticValues &,
|
|
|
std::any &) -> size_t {
|
|
|
static std::vector<std::string> names = {"PEG", "BNF"};
|
|
|
for (const auto &name : names) {
|
|
|
if (name.size() <= n &&
|
|
|
!name.compare(0, name.size(), s, name.size())) {
|
|
|
return name.size();
|
|
|
}
|
|
|
}
|
|
|
return static_cast<size_t>(-1);
|
|
|
})},
|
|
|
{"~_", zom(cls(" \t\r\n"))}});
|
|
|
|
|
|
REQUIRE(g.parse(" Hello BNF! ") == true);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Semantic predicate test", "[predicate]") {
|
|
|
parser parser("NUMBER <- [0-9]+");
|
|
|
|
|
|
parser["NUMBER"] = [](const SemanticValues &vs) {
|
|
|
auto val = vs.token_to_number<long>();
|
|
|
if (val != 100) { throw parse_error("value error!!"); }
|
|
|
return val;
|
|
|
};
|
|
|
|
|
|
long val;
|
|
|
REQUIRE(parser.parse("100", val));
|
|
|
REQUIRE(val == 100);
|
|
|
|
|
|
parser.log = [](size_t line, size_t col, const std::string &msg) {
|
|
|
REQUIRE(line == 1);
|
|
|
REQUIRE(col == 1);
|
|
|
REQUIRE(msg == "value error!!");
|
|
|
};
|
|
|
REQUIRE(!parser.parse("200", val));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Japanese character", "[unicode]") {
|
|
|
peg::parser parser(u8R"(
|
|
|
文 <- 修飾語? 主語 述語 '。'
|
|
|
主語 <- 名詞 助詞
|
|
|
述語 <- 動詞 助詞
|
|
|
修飾語 <- 形容詞
|
|
|
名詞 <- 'サーバー' / 'クライアント'
|
|
|
形容詞 <- '古い' / '新しい'
|
|
|
動詞 <- '落ち' / '復旧し'
|
|
|
助詞 <- 'が' / 'を' / 'た' / 'ます' / 'に'
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
REQUIRE(parser.parse(u8R"(サーバーを復旧します。)"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("dot with a code", "[unicode]") {
|
|
|
peg::parser parser(" S <- 'a' . 'b' ");
|
|
|
REQUIRE(parser.parse(u8R"(aあb)"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("dot with a char", "[unicode]") {
|
|
|
peg::parser parser(" S <- 'a' . 'b' ");
|
|
|
REQUIRE(parser.parse(u8R"(aåb)"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("character class", "[unicode]") {
|
|
|
peg::parser parser(R"(
|
|
|
S <- 'a' [い-おAさC-Eた-とは] 'b'
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
REQUIRE(!parser.parse(u8R"(aあb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aいb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aうb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aおb)"));
|
|
|
REQUIRE(!parser.parse(u8R"(aかb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aAb)"));
|
|
|
REQUIRE(!parser.parse(u8R"(aBb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aEb)"));
|
|
|
REQUIRE(!parser.parse(u8R"(aFb)"));
|
|
|
REQUIRE(!parser.parse(u8R"(aそb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aたb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aちb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aとb)"));
|
|
|
REQUIRE(!parser.parse(u8R"(aなb)"));
|
|
|
REQUIRE(parser.parse(u8R"(aはb)"));
|
|
|
REQUIRE(!parser.parse(u8R"(a?b)"));
|
|
|
}
|
|
|
|
|
|
#if 0 // TODO: Unicode Grapheme support
|
|
|
TEST_CASE("dot with a grapheme", "[unicode]")
|
|
|
{
|
|
|
peg::parser parser(" S <- 'a' . 'b' ");
|
|
|
REQUIRE(parser.parse(u8R"(aसिb)"));
|
|
|
}
|
|
|
#endif
|
|
|
|
|
|
TEST_CASE("Macro simple test", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- HELLO WORLD
|
|
|
HELLO <- T('hello')
|
|
|
WORLD <- T('world')
|
|
|
T(a) <- a [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("hello \tworld "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro two parameters", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- HELLO_WORLD
|
|
|
HELLO_WORLD <- T('hello', 'world')
|
|
|
T(a, b) <- a [ \t]* b [ \t]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("hello \tworld "));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro syntax error", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- T('hello')
|
|
|
T (a) <- a [ \t]*
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro missing argument", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- T ('hello')
|
|
|
T(a, b) <- a [ \t]* b
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro reference syntax error", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- T ('hello')
|
|
|
T(a) <- a [ \t]*
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro invalid macro reference error", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- T('hello')
|
|
|
T <- 'world'
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == false);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro calculator", "[macro]") {
|
|
|
// Create a PEG parser
|
|
|
parser parser(R"(
|
|
|
# Grammar for simple calculator...
|
|
|
EXPRESSION <- _ LIST(TERM, TERM_OPERATOR)
|
|
|
TERM <- LIST(FACTOR, FACTOR_OPERATOR)
|
|
|
FACTOR <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
TERM_OPERATOR <- T([-+])
|
|
|
FACTOR_OPERATOR <- T([/*])
|
|
|
NUMBER <- T([0-9]+)
|
|
|
~_ <- [ \t]*
|
|
|
LIST(I, D) <- I (D I)*
|
|
|
T(S) <- < S > _
|
|
|
)");
|
|
|
|
|
|
// Setup actions
|
|
|
auto reduce = [](const SemanticValues &vs) {
|
|
|
auto result = std::any_cast<long>(vs[0]);
|
|
|
for (auto i = 1u; i < vs.size(); i += 2) {
|
|
|
auto num = std::any_cast<long>(vs[i + 1]);
|
|
|
auto ope = std::any_cast<char>(vs[i]);
|
|
|
switch (ope) {
|
|
|
case '+': result += num; break;
|
|
|
case '-': result -= num; break;
|
|
|
case '*': result *= num; break;
|
|
|
case '/': result /= num; break;
|
|
|
}
|
|
|
}
|
|
|
return result;
|
|
|
};
|
|
|
|
|
|
parser["EXPRESSION"] = reduce;
|
|
|
parser["TERM"] = reduce;
|
|
|
parser["TERM_OPERATOR"] = [](const SemanticValues &vs) {
|
|
|
return static_cast<char>(*vs.sv().data());
|
|
|
};
|
|
|
parser["FACTOR_OPERATOR"] = [](const SemanticValues &vs) {
|
|
|
return static_cast<char>(*vs.sv().data());
|
|
|
};
|
|
|
parser["NUMBER"] = [](const SemanticValues &vs) { return vs.token_to_number<long>(); };
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
auto expr = " 1 + 2 * 3 * (4 - 5 + 6) / 7 - 8 ";
|
|
|
long val = 0;
|
|
|
ret = parser.parse(expr, val);
|
|
|
|
|
|
REQUIRE(ret == true);
|
|
|
REQUIRE(val == -3);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro expression arguments", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- M('hello' / 'Hello', 'world' / 'World')
|
|
|
M(arg0, arg1) <- arg0 [ \t]+ arg1
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("Hello world"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro recursive", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- M('abc')
|
|
|
M(s) <- !s / s ' ' M(s / '123') / s
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse(""));
|
|
|
REQUIRE(parser.parse("abc"));
|
|
|
REQUIRE(parser.parse("abc abc"));
|
|
|
REQUIRE(parser.parse("abc 123 abc"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro recursive2", "[macro]") {
|
|
|
auto syntaxes = std::vector<const char *>{
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(s* '-' '123') / s",
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(s+ '-' '123') / s",
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(s? '-' '123') / s",
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(&s s+ '-' '123') / s",
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(s '-' !s '123') / s",
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(< s > '-' '123') / s",
|
|
|
"S <- M('abc') M(s) <- !s / s ' ' M(~s '-' '123') / s",
|
|
|
};
|
|
|
|
|
|
for (const auto &syntax : syntaxes) {
|
|
|
parser parser(syntax);
|
|
|
REQUIRE(parser.parse("abc abc-123"));
|
|
|
}
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro exclusive modifiers", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
S <- Modifiers(!"") _
|
|
|
Modifiers(Appeared) <- (!Appeared) (
|
|
|
Token('public') Modifiers(Appeared / 'public') /
|
|
|
Token('static') Modifiers(Appeared / 'static') /
|
|
|
Token('final') Modifiers(Appeared / 'final') /
|
|
|
"")
|
|
|
Token(t) <- t _
|
|
|
_ <- [ \t\r\n]*
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("public"));
|
|
|
REQUIRE(parser.parse("static"));
|
|
|
REQUIRE(parser.parse("final"));
|
|
|
REQUIRE(parser.parse("public static final"));
|
|
|
REQUIRE(!parser.parse("public public"));
|
|
|
REQUIRE(!parser.parse("public static public"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro token check test", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
# Grammar for simple calculator...
|
|
|
EXPRESSION <- _ LIST(TERM, TERM_OPERATOR)
|
|
|
TERM <- LIST(FACTOR, FACTOR_OPERATOR)
|
|
|
FACTOR <- NUMBER / T('(') EXPRESSION T(')')
|
|
|
TERM_OPERATOR <- T([-+])
|
|
|
FACTOR_OPERATOR <- T([/*])
|
|
|
NUMBER <- T([0-9]+)
|
|
|
~_ <- [ \t]*
|
|
|
LIST(I, D) <- I (D I)*
|
|
|
T(S) <- < S > _
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser["EXPRESSION"].is_token() == false);
|
|
|
REQUIRE(parser["TERM"].is_token() == false);
|
|
|
REQUIRE(parser["FACTOR"].is_token() == false);
|
|
|
REQUIRE(parser["FACTOR_OPERATOR"].is_token() == true);
|
|
|
REQUIRE(parser["NUMBER"].is_token() == true);
|
|
|
REQUIRE(parser["_"].is_token() == true);
|
|
|
REQUIRE(parser["LIST"].is_token() == false);
|
|
|
REQUIRE(parser["T"].is_token() == true);
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Macro passes an arg to another macro", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
A <- B(C)
|
|
|
B(D) <- D
|
|
|
C <- 'c'
|
|
|
D <- 'd'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("c"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Nested macro call", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
A <- B(T)
|
|
|
B(X) <- C(X)
|
|
|
C(Y) <- Y
|
|
|
T <- 'val'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("val"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Nested macro call2", "[macro]") {
|
|
|
parser parser(R"(
|
|
|
START <- A('TestVal1', 'TestVal2')+
|
|
|
A(Aarg1, Aarg2) <- B(Aarg1) '#End'
|
|
|
B(Barg1) <- '#' Barg1
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("#TestVal1#End"));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Line information test", "[line information]") {
|
|
|
parser parser(R"(
|
|
|
S <- _ (WORD _)+
|
|
|
WORD <- [A-Za-z]+
|
|
|
~_ <- [ \t\r\n]+
|
|
|
)");
|
|
|
|
|
|
std::vector<std::pair<size_t, size_t>> locations;
|
|
|
parser["WORD"] = [&](const peg::SemanticValues &vs) {
|
|
|
locations.push_back(vs.line_info());
|
|
|
};
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
ret = parser.parse(" Mon Tue Wed \nThu Fri Sat\nSun\n");
|
|
|
REQUIRE(ret == true);
|
|
|
|
|
|
REQUIRE(locations[0] == std::make_pair<size_t, size_t>(1, 2));
|
|
|
REQUIRE(locations[1] == std::make_pair<size_t, size_t>(1, 6));
|
|
|
REQUIRE(locations[2] == std::make_pair<size_t, size_t>(1, 10));
|
|
|
REQUIRE(locations[3] == std::make_pair<size_t, size_t>(2, 1));
|
|
|
REQUIRE(locations[4] == std::make_pair<size_t, size_t>(2, 6));
|
|
|
REQUIRE(locations[5] == std::make_pair<size_t, size_t>(2, 11));
|
|
|
REQUIRE(locations[6] == std::make_pair<size_t, size_t>(3, 1));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Dictionary", "[dic]") {
|
|
|
parser parser(R"(
|
|
|
START <- 'This month is ' MONTH '.'
|
|
|
MONTH <- 'Jan' | 'January' | 'Feb' | 'February'
|
|
|
)");
|
|
|
|
|
|
REQUIRE(parser.parse("This month is Jan."));
|
|
|
REQUIRE(parser.parse("This month is January."));
|
|
|
REQUIRE_FALSE(parser.parse("This month is Jannuary."));
|
|
|
REQUIRE_FALSE(parser.parse("This month is ."));
|
|
|
}
|
|
|
|
|
|
TEST_CASE("Dictionary invalid", "[dic]") {
|
|
|
parser parser(R"(
|
|
|
START <- 'This month is ' MONTH '.'
|
|
|
MONTH <- 'Jan' | 'January' | [a-z]+ | 'Feb' | 'February'
|
|
|
)");
|
|
|
|
|
|
bool ret = parser;
|
|
|
REQUIRE_FALSE(ret);
|
|
|
}
|
|
|
|
|
|
// vim: et ts=4 sw=4 cin cino={1s ff=unix
|
|
|
|
