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Fix #128

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This commit is contained in:
yhirose 2020-11-09 12:06:48 -05:00
parent 11ed83e46f
commit b92da07bed
4 changed files with 103 additions and 10 deletions
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2
docs/native.js
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docs/native.wasm
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16
peglib.h
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@ -827,7 +827,7 @@ public:
std::vector<Definition *> rule_stack;
std::vector<std::vector<std::shared_ptr<Ope>>> args_stack;
bool in_token = false;
size_t in_token_boundary_count = 0;
std::shared_ptr<Ope> whitespaceOpe;
bool in_whitespace = false;
@ -2392,7 +2392,7 @@ inline size_t parse_literal(const char *s, size_t n, SemanticValues &sv,
}
// Skip whiltespace
if (!c.in_token) {
if (!c.in_token_boundary_count) {
if (c.whitespaceOpe) {
auto len = c.whitespaceOpe->parse(s + i, n - i, sv, c, dt);
if (fail(len)) { return static_cast<size_t>(-1); }
@ -2457,18 +2457,24 @@ inline size_t LiteralString::parse_core(const char *s, size_t n,
inline size_t TokenBoundary::parse_core(const char *s, size_t n,
SemanticValues &sv, Context &c,
any &dt) const {
c.in_token = true;
auto se = make_scope_exit([&]() { c.in_token = false; });
auto len = ope_->parse(s, n, sv, c, dt);
size_t len;
{
c.in_token_boundary_count++;
auto se = make_scope_exit([&]() { c.in_token_boundary_count--; });
len = ope_->parse(s, n, sv, c, dt);
}
if (success(len)) {
sv.tokens.emplace_back(std::make_pair(s, len));
if (!c.in_token_boundary_count) {
if (c.whitespaceOpe) {
auto l = c.whitespaceOpe->parse(s + len, n - len, sv, c, dt);
if (fail(l)) { return static_cast<size_t>(-1); }
len += l;
}
}
}
return len;
}

87
test/test2.cc
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@ -3,6 +3,93 @@
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"(