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// lex.cc -- Go frontend lexer.
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "go-system.h"
#include "go-diagnostics.h"
#include "lex.h"
// Manage mapping from keywords to the Keyword codes.
class Keywords
{
public:
// The structure which maps keywords to codes.
struct Mapping
{
// Keyword string.
const char* keystring;
// Keyword code.
Keyword keycode;
};
// Return the parsecode corresponding to KEYSTRING, or
// KEYWORD_INVALID if it is not a keyword.
Keyword
keyword_to_code(const char* keyword, size_t len) const;
// Return the string for a keyword.
const char*
keyword_to_string(Keyword) const;
private:
static const Mapping mapping_[];
static const int count_;
};
// Mapping from keyword string to keyword code. This array must be
// kept in sorted order, and the order must match the Keyword enum.
// Strings are looked up using bsearch.
const Keywords::Mapping
Keywords::mapping_[] =
{
{ NULL, KEYWORD_INVALID },
{ "__asm__", KEYWORD_ASM },
{ "break", KEYWORD_BREAK },
{ "case", KEYWORD_CASE },
{ "chan", KEYWORD_CHAN },
{ "const", KEYWORD_CONST },
{ "continue", KEYWORD_CONTINUE },
{ "default", KEYWORD_DEFAULT },
{ "defer", KEYWORD_DEFER },
{ "else", KEYWORD_ELSE },
{ "fallthrough", KEYWORD_FALLTHROUGH },
{ "for", KEYWORD_FOR },
{ "func", KEYWORD_FUNC },
{ "go", KEYWORD_GO },
{ "goto", KEYWORD_GOTO },
{ "if", KEYWORD_IF },
{ "import", KEYWORD_IMPORT },
{ "interface", KEYWORD_INTERFACE },
{ "map", KEYWORD_MAP },
{ "package", KEYWORD_PACKAGE },
{ "range", KEYWORD_RANGE },
{ "return", KEYWORD_RETURN },
{ "select", KEYWORD_SELECT },
{ "struct", KEYWORD_STRUCT },
{ "switch", KEYWORD_SWITCH },
{ "type", KEYWORD_TYPE },
{ "var", KEYWORD_VAR }
};
// Number of entries in the map.
const int Keywords::count_ =
sizeof(Keywords::mapping_) / sizeof(Keywords::mapping_[0]);
// Comparison function passed to bsearch.
extern "C"
{
struct Keywords_search_key
{
const char* str;
size_t len;
};
static int
keyword_compare(const void* keyv, const void* mapv)
{
const Keywords_search_key* key =
static_cast<const Keywords_search_key*>(keyv);
const Keywords::Mapping* map =
static_cast<const Keywords::Mapping*>(mapv);
if (map->keystring == NULL)
return 1;
int i = strncmp(key->str, map->keystring, key->len);
if (i != 0)
return i;
if (map->keystring[key->len] != '\0')
return -1;
return 0;
}
} // End extern "C".
// Convert a string to a keyword code. Return KEYWORD_INVALID if the
// string is not a keyword.
Keyword
Keywords::keyword_to_code(const char* keyword, size_t len) const
{
Keywords_search_key key;
key.str = keyword;
key.len = len;
void* mapv = bsearch(&key,
this->mapping_,
this->count_,
sizeof(this->mapping_[0]),
keyword_compare);
if (mapv == NULL)
return KEYWORD_INVALID;
Mapping* map = static_cast<Mapping*>(mapv);
return map->keycode;
}
// Convert a keyword code to a string.
const char*
Keywords::keyword_to_string(Keyword code) const
{
go_assert(code > KEYWORD_INVALID && code < this->count_);
const Mapping* map = &this->mapping_[code];
go_assert(map->keycode == code);
return map->keystring;
}
// There is one instance of the Keywords class.
static Keywords keywords;
// Class Token.
// Make a general token.
Token::Token(Classification classification, Location location)
: classification_(classification), location_(location)
{
}
// Destroy a token.
Token::~Token()
{
this->clear();
}
// Clear a token--release memory.
void
Token::clear()
{
if (this->classification_ == TOKEN_INTEGER
|| this->classification_ == TOKEN_CHARACTER)
mpz_clear(this->u_.integer_value);
else if (this->classification_ == TOKEN_FLOAT
|| this->classification_ == TOKEN_IMAGINARY)
mpfr_clear(this->u_.float_value);
}
// Construct a token.
Token::Token(const Token& tok)
: classification_(tok.classification_), location_(tok.location_)
{
switch (this->classification_)
{
case TOKEN_INVALID:
case TOKEN_EOF:
break;
case TOKEN_KEYWORD:
this->u_.keyword = tok.u_.keyword;
break;
case TOKEN_IDENTIFIER:
case TOKEN_STRING:
this->u_.string_value = tok.u_.string_value;
break;
case TOKEN_OPERATOR:
this->u_.op = tok.u_.op;
break;
case TOKEN_CHARACTER:
case TOKEN_INTEGER:
mpz_init_set(this->u_.integer_value, tok.u_.integer_value);
break;
case TOKEN_FLOAT:
case TOKEN_IMAGINARY:
mpfr_init_set(this->u_.float_value, tok.u_.float_value, GMP_RNDN);
break;
default:
go_unreachable();
}
}
// Assign to a token.
Token&
Token::operator=(const Token& tok)
{
this->clear();
this->classification_ = tok.classification_;
this->location_ = tok.location_;
switch (tok.classification_)
{
case TOKEN_INVALID:
case TOKEN_EOF:
break;
case TOKEN_KEYWORD:
this->u_.keyword = tok.u_.keyword;
break;
case TOKEN_IDENTIFIER:
this->u_.identifier_value.name = tok.u_.identifier_value.name;
this->u_.identifier_value.is_exported =
tok.u_.identifier_value.is_exported;
break;
case TOKEN_STRING:
this->u_.string_value = tok.u_.string_value;
break;
case TOKEN_OPERATOR:
this->u_.op = tok.u_.op;
break;
case TOKEN_CHARACTER:
case TOKEN_INTEGER:
mpz_init_set(this->u_.integer_value, tok.u_.integer_value);
break;
case TOKEN_FLOAT:
case TOKEN_IMAGINARY:
mpfr_init_set(this->u_.float_value, tok.u_.float_value, GMP_RNDN);
break;
default:
go_unreachable();
}
return *this;
}
// Print the token for debugging.
void
Token::print(FILE* file) const
{
switch (this->classification_)
{
case TOKEN_INVALID:
fprintf(file, "invalid");
break;
case TOKEN_EOF:
fprintf(file, "EOF");
break;
case TOKEN_KEYWORD:
fprintf(file, "keyword %s", keywords.keyword_to_string(this->u_.keyword));
break;
case TOKEN_IDENTIFIER:
fprintf(file, "identifier \"%s\"", this->u_.string_value->c_str());
break;
case TOKEN_STRING:
fprintf(file, "quoted string \"%s\"", this->u_.string_value->c_str());
break;
case TOKEN_CHARACTER:
fprintf(file, "character ");
mpz_out_str(file, 10, this->u_.integer_value);
break;
case TOKEN_INTEGER:
fprintf(file, "integer ");
mpz_out_str(file, 10, this->u_.integer_value);
break;
case TOKEN_FLOAT:
fprintf(file, "float ");
mpfr_out_str(file, 10, 0, this->u_.float_value, GMP_RNDN);
break;
case TOKEN_IMAGINARY:
fprintf(file, "imaginary ");
mpfr_out_str(file, 10, 0, this->u_.float_value, GMP_RNDN);
break;
case TOKEN_OPERATOR:
fprintf(file, "operator ");
switch (this->u_.op)
{
case OPERATOR_INVALID:
fprintf(file, "invalid");
break;
case OPERATOR_OROR:
fprintf(file, "||");
break;
case OPERATOR_ANDAND:
fprintf(file, "&&");
break;
case OPERATOR_EQEQ:
fprintf(file, "==");
break;
case OPERATOR_NOTEQ:
fprintf(file, "!=");
break;
case OPERATOR_LT:
fprintf(file, "<");
break;
case OPERATOR_LE:
fprintf(file, "<=");
break;
case OPERATOR_GT:
fprintf(file, ">");
break;
case OPERATOR_GE:
fprintf(file, ">=");
break;
case OPERATOR_PLUS:
fprintf(file, "+");
break;
case OPERATOR_MINUS:
fprintf(file, "-");
break;
case OPERATOR_OR:
fprintf(file, "|");
break;
case OPERATOR_XOR:
fprintf(file, "^");
break;
case OPERATOR_MULT:
fprintf(file, "*");
break;
case OPERATOR_DIV:
fprintf(file, "/");
break;
case OPERATOR_MOD:
fprintf(file, "%%");
break;
case OPERATOR_LSHIFT:
fprintf(file, "<<");
break;
case OPERATOR_RSHIFT:
fprintf(file, ">>");
break;
case OPERATOR_AND:
fprintf(file, "&");
break;
case OPERATOR_BITCLEAR:
fprintf(file, "&^");
break;
case OPERATOR_NOT:
fprintf(file, "!");
break;
case OPERATOR_CHANOP:
fprintf(file, "<-");
break;
case OPERATOR_EQ:
fprintf(file, "=");
break;
case OPERATOR_PLUSEQ:
fprintf(file, "+=");
break;
case OPERATOR_MINUSEQ:
fprintf(file, "-=");
break;
case OPERATOR_OREQ:
fprintf(file, "|=");
break;
case OPERATOR_XOREQ:
fprintf(file, "^=");
break;
case OPERATOR_MULTEQ:
fprintf(file, "*=");
break;
case OPERATOR_DIVEQ:
fprintf(file, "/=");
break;
case OPERATOR_MODEQ:
fprintf(file, "%%=");
break;
case OPERATOR_LSHIFTEQ:
fprintf(file, "<<=");
break;
case OPERATOR_RSHIFTEQ:
fprintf(file, ">>=");
break;
case OPERATOR_ANDEQ:
fprintf(file, "&=");
break;
case OPERATOR_BITCLEAREQ:
fprintf(file, "&^=");
break;
case OPERATOR_PLUSPLUS:
fprintf(file, "++");
break;
case OPERATOR_MINUSMINUS:
fprintf(file, "--");
break;
case OPERATOR_COLON:
fprintf(file, ":");
break;
case OPERATOR_COLONEQ:
fprintf(file, ":=");
break;
case OPERATOR_SEMICOLON:
fprintf(file, ";");
break;
case OPERATOR_DOT:
fprintf(file, ".");
break;
case OPERATOR_COMMA:
fprintf(file, ",");
break;
case OPERATOR_LPAREN:
fprintf(file, "(");
break;
case OPERATOR_RPAREN:
fprintf(file, ")");
break;
case OPERATOR_LCURLY:
fprintf(file, "{");
break;
case OPERATOR_RCURLY:
fprintf(file, "}");
break;
case OPERATOR_LSQUARE:
fprintf(file, "[");
break;
case OPERATOR_RSQUARE:
fprintf(file, "]");
break;
default:
go_unreachable();
}
break;
default:
go_unreachable();
}
}
// Class Lex.
Lex::Lex(const char* input_file_name, FILE* input_file, Linemap* linemap)
: input_file_name_(input_file_name), input_file_(input_file),
linemap_(linemap), linebuf_(NULL), linebufsize_(120), linesize_(0),
lineoff_(0), lineno_(0), add_semi_at_eol_(false), pragmas_(0),
extern_(), linknames_(NULL)
{
this->linebuf_ = new char[this->linebufsize_];
this->linemap_->start_file(input_file_name, 0);
}
Lex::~Lex()
{
delete[] this->linebuf_;
}
// Read a new line from the file.
ssize_t
Lex::get_line()
{
char* buf = this->linebuf_;
size_t size = this->linebufsize_;
FILE* file = this->input_file_;
size_t cur = 0;
while (true)
{
int c = getc(file);
if (c == EOF)
{
if (cur == 0)
return -1;
break;
}
if (cur + 1 >= size)
{
size_t ns = 2 * size + 1;
if (ns < size || static_cast<ssize_t>(ns) < 0)
go_error_at(this->location(), "out of memory");
char* nb = new char[ns];
memcpy(nb, buf, cur);
delete[] buf;
buf = nb;
size = ns;
}
buf[cur] = c;
++cur;
if (c == '\n')
break;
}
buf[cur] = '\0';
this->linebuf_ = buf;
this->linebufsize_ = size;
return cur;
}
// See if we need to read a new line. Return true if there is a new
// line, false if we are at EOF.
bool
Lex::require_line()
{
if (this->lineoff_ < this->linesize_)
return true;
ssize_t got = this->get_line();
if (got < 0)
return false;
++this->lineno_;
this->linesize_= got;
this->lineoff_ = 0;
this->linemap_->start_line(this->lineno_, this->linesize_);
return true;
}
// Get the current location.
Location
Lex::location() const
{
return this->linemap_->get_location(this->lineoff_ + 1);
}
// Get a location slightly before the current one. This is used for
// slightly more efficient handling of operator tokens.
Location
Lex::earlier_location(int chars) const
{
return this->linemap_->get_location(this->lineoff_ + 1 - chars);
}
// Get the next token.
Token
Lex::next_token()
{
bool saw_cpp_comment = false;
while (true)
{
if (!this->require_line())
{
bool add_semi_at_eol = this->add_semi_at_eol_;
this->add_semi_at_eol_ = false;
if (add_semi_at_eol)
return this->make_operator(OPERATOR_SEMICOLON, 1);
return this->make_eof_token();
}
if (!saw_cpp_comment)
this->extern_.clear();
saw_cpp_comment = false;
const char* p = this->linebuf_ + this->lineoff_;
const char* pend = this->linebuf_ + this->linesize_;
while (p < pend)
{
unsigned char cc = *p;
switch (cc)
{
case ' ': case '\t': case '\r':
++p;
// Skip whitespace quickly.
while (*p == ' ' || *p == '\t' || *p == '\r')
++p;
break;
case '\n':
{
++p;
bool add_semi_at_eol = this->add_semi_at_eol_;
this->add_semi_at_eol_ = false;
if (add_semi_at_eol)
{
this->lineoff_ = p - this->linebuf_;
return this->make_operator(OPERATOR_SEMICOLON, 1);
}
}
break;
case '/':
if (p[1] == '/')
{
this->lineoff_ = p + 2 - this->linebuf_;
this->skip_cpp_comment();
p = pend;
if (p[-1] == '\n' && this->add_semi_at_eol_)
--p;
saw_cpp_comment = true;
}
else if (p[1] == '*')
{
this->lineoff_ = p + 2 - this->linebuf_;
Location location = this->location();
bool found_newline = false;
if (!this->skip_c_comment(&found_newline))
return Token::make_invalid_token(location);
if (found_newline && this->add_semi_at_eol_)
{
this->add_semi_at_eol_ = false;
return this->make_operator(OPERATOR_SEMICOLON, 1);
}
p = this->linebuf_ + this->lineoff_;
pend = this->linebuf_ + this->linesize_;
}
else if (p[1] == '=')
{
this->add_semi_at_eol_ = false;
this->lineoff_ = p + 2 - this->linebuf_;
return this->make_operator(OPERATOR_DIVEQ, 2);
}
else
{
this->add_semi_at_eol_ = false;
this->lineoff_ = p + 1 - this->linebuf_;
return this->make_operator(OPERATOR_DIV, 1);
}
break;
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
case 'Y': case 'Z':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'y': case 'z':
case '_':
this->lineoff_ = p - this->linebuf_;
return this->gather_identifier();
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
this->add_semi_at_eol_ = true;
this->lineoff_ = p - this->linebuf_;
return this->gather_number();
case '\'':
this->add_semi_at_eol_ = true;
this->lineoff_ = p - this->linebuf_;
return this->gather_character();
case '"':
this->add_semi_at_eol_ = true;
this->lineoff_ = p - this->linebuf_;
return this->gather_string();
case '`':
this->add_semi_at_eol_ = true;
this->lineoff_ = p - this->linebuf_;
return this->gather_raw_string();
case '<':
case '>':
case '&':
if (p + 2 < pend)
{
this->add_semi_at_eol_ = false;
Operator op = this->three_character_operator(cc, p[1], p[2]);
if (op != OPERATOR_INVALID)
{
this->lineoff_ = p + 3 - this->linebuf_;
return this->make_operator(op, 3);
}
}
// Fall through.
case '|':
case '=':
case '!':
case '+':
case '-':
case '^':
case '*':
// '/' handled above.
case '%':
case ':':
case ';':
case ',':
case '(': case ')':
case '{': case '}':
case '[': case ']':
{
this->add_semi_at_eol_ = false;
Operator op = this->two_character_operator(cc, p[1]);
int chars;
if (op != OPERATOR_INVALID)
{
++p;
chars = 2;
}
else
{
op = this->one_character_operator(cc);
chars = 1;
}
this->lineoff_ = p + 1 - this->linebuf_;
return this->make_operator(op, chars);
}
case '.':
if (p[1] >= '0' && p[1] <= '9')
{
this->add_semi_at_eol_ = true;
this->lineoff_ = p - this->linebuf_;
return this->gather_number();
}
if (p[1] == '.' && p[2] == '.')
{
this->add_semi_at_eol_ = false;
this->lineoff_ = p + 3 - this->linebuf_;
return this->make_operator(OPERATOR_ELLIPSIS, 3);
}
this->add_semi_at_eol_ = false;
this->lineoff_ = p + 1 - this->linebuf_;
return this->make_operator(OPERATOR_DOT, 1);
default:
{
unsigned int ci;
bool issued_error;
this->lineoff_ = p - this->linebuf_;
const char *pnext = this->advance_one_utf8_char(p, &ci,
&issued_error);
// Ignore byte order mark at start of file.
if (ci == 0xfeff)
{
p = pnext;
break;
}
if (Lex::is_unicode_letter(ci))
return this->gather_identifier();
if (!issued_error)
go_error_at(this->location(),
"invalid character 0x%x in input file",
ci);
p = pend;
break;
}
}
}
this->lineoff_ = p - this->linebuf_;
}
}
// Fetch one UTF-8 character from a string. Set *VALUE to the value.
// Return the number of bytes read from the string. Returns 0 if the
// string does not point to a valid UTF-8 character.
int
Lex::fetch_char(const char* p, unsigned int* value)
{
unsigned char c = *p;
if (c <= 0x7f)
{
*value = c;
return 1;
}
else if ((c & 0xe0) == 0xc0
&& (p[1] & 0xc0) == 0x80)
{
*value = (((c & 0x1f) << 6)
+ (p[1] & 0x3f));
if (*value <= 0x7f)
{
*value = 0xfffd;
return 0;
}
return 2;
}
else if ((c & 0xf0) == 0xe0
&& (p[1] & 0xc0) == 0x80
&& (p[2] & 0xc0) == 0x80)
{
*value = (((c & 0xf) << 12)
+ ((p[1] & 0x3f) << 6)
+ (p[2] & 0x3f));
if (*value <= 0x7ff)
{
*value = 0xfffd;
return 0;
}
return 3;
}
else if ((c & 0xf8) == 0xf0
&& (p[1] & 0xc0) == 0x80
&& (p[2] & 0xc0) == 0x80
&& (p[3] & 0xc0) == 0x80)
{
*value = (((c & 0x7) << 18)
+ ((p[1] & 0x3f) << 12)
+ ((p[2] & 0x3f) << 6)
+ (p[3] & 0x3f));
if (*value <= 0xffff)
{
*value = 0xfffd;
return 0;
}
return 4;
}
else
{
/* Invalid encoding. Return the Unicode replacement
character. */
*value = 0xfffd;
return 0;
}
}
// Advance one UTF-8 character. Return the pointer beyond the
// character. Set *VALUE to the value. Set *ISSUED_ERROR if an error
// was issued.
const char*
Lex::advance_one_utf8_char(const char* p, unsigned int* value,
bool* issued_error)
{
*issued_error = false;
if (*p == '\0')
{
go_error_at(this->location(), "invalid NUL byte");
*issued_error = true;
*value = 0;
return p + 1;
}
int adv = Lex::fetch_char(p, value);
if (adv == 0)
{
go_error_at(this->location(), "invalid UTF-8 encoding");
*issued_error = true;
return p + 1;
}
// Warn about byte order mark, except at start of file.
if (*value == 0xfeff && (this->lineno_ != 1 || this->lineoff_ != 0))
{
go_error_at(this->location(), "Unicode (UTF-8) BOM in middle of file");
*issued_error = true;
}
return p + adv;
}
// Pick up an identifier.
Token
Lex::gather_identifier()
{
const char* pstart = this->linebuf_ + this->lineoff_;
const char* p = pstart;
const char* pend = this->linebuf_ + this->linesize_;
bool is_first = true;
bool is_exported = false;
bool has_non_ascii_char = false;
std::string buf;
while (p < pend)
{
unsigned char cc = *p;
if (cc <= 0x7f)
{
if ((cc < 'A' || cc > 'Z')
&& (cc < 'a' || cc > 'z')
&& cc != '_'
&& (cc < '0' || cc > '9'))
{
// Check for an invalid character here, as we get better
// error behaviour if we swallow them as part of the
// identifier we are building.
if ((cc >= ' ' && cc < 0x7f)
|| cc == '\t'
|| cc == '\r'
|| cc == '\n')
break;
this->lineoff_ = p - this->linebuf_;
go_error_at(this->location(),
"invalid character 0x%x in identifier",
cc);
if (!has_non_ascii_char)
{
buf.assign(pstart, p - pstart);
has_non_ascii_char = true;
}
if (!Lex::is_invalid_identifier(buf))
buf.append("$INVALID$");
}
++p;
if (is_first)
{
is_exported = cc >= 'A' && cc <= 'Z';
is_first = false;
}
if (has_non_ascii_char)
buf.push_back(cc);
}
else
{
unsigned int ci;
bool issued_error;
this->lineoff_ = p - this->linebuf_;
const char* pnext = this->advance_one_utf8_char(p, &ci,
&issued_error);
bool is_invalid = false;
if (!Lex::is_unicode_letter(ci) && !Lex::is_unicode_digit(ci))
{
// There is no valid place for a non-ASCII character
// other than an identifier, so we get better error
// handling behaviour if we swallow this character after
// giving an error.
if (!issued_error)
go_error_at(this->location(),
"invalid character 0x%x in identifier",
ci);
is_invalid = true;
}
if (is_first)
{
is_exported = Lex::is_unicode_uppercase(ci);
is_first = false;
}
if (!has_non_ascii_char)
{
buf.assign(pstart, p - pstart);
has_non_ascii_char = true;
}
if (is_invalid && !Lex::is_invalid_identifier(buf))
buf.append("$INVALID$");
buf.append(p, pnext - p);
p = pnext;
}
}
Location location = this->location();
this->add_semi_at_eol_ = true;
this->lineoff_ = p - this->linebuf_;
if (has_non_ascii_char)
return Token::make_identifier_token(buf, is_exported, location);
else
{
Keyword code = keywords.keyword_to_code(pstart, p - pstart);
if (code == KEYWORD_INVALID)
return Token::make_identifier_token(std::string(pstart, p - pstart),
is_exported, location);
else
{
switch (code)
{
case KEYWORD_BREAK:
case KEYWORD_CONTINUE:
case KEYWORD_FALLTHROUGH:
case KEYWORD_RETURN:
break;
default:
this->add_semi_at_eol_ = false;
break;
}
return Token::make_keyword_token(code, location);
}
}
}
// Return whether C is a hex digit.
bool
Lex::is_hex_digit(char c)
{
return ((c >= '0' && c <= '9')
|| (c >= 'A' && c <= 'F')
|| (c >= 'a' && c <= 'f'));
}
// not a hex value
#define NHV 100
// for use by Lex::hex_val
static const unsigned char hex_value_lookup_table[256] =
{
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // NUL SOH STX ETX EOT ENQ ACK BEL
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // BS HT LF VT FF CR SO SI
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // DLE DC1 DC2 DC3 DC4 NAK SYN ETB
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // CAN EM SUB ESC FS GS RS US
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // SP ! " # $ % & '
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // ( ) * + , - . /
0, 1, 2, 3, 4, 5, 6, 7, // 0 1 2 3 4 5 6 7
8, 9, NHV, NHV, NHV, NHV, NHV, NHV, // 8 9 : ; < = > ?
NHV, 10, 11, 12, 13, 14, 15, NHV, // @ A B C D E F G
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // H I J K L M N O
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // P Q R S T U V W
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // X Y Z [ \ ] ^ _
NHV, 10, 11, 12, 13, 14, 15, NHV, // ` a b c d e f g
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // h i j k l m n o
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // p q r s t u v w
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, // x y z { | } ~
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV, //
NHV, NHV, NHV, NHV, NHV, NHV, NHV, NHV //
};
unsigned
Lex::hex_val(char c)
{
return hex_value_lookup_table[static_cast<unsigned char>(c)];
}
// Return whether an exponent could start at P.
bool
Lex::could_be_exponent(const char* p, const char* pend)
{
if (*p != 'e' && *p != 'E')
return false;
++p;
if (p >= pend)
return false;
if (*p == '+' || *p == '-')
{
++p;
if (p >= pend)
return false;
}
return *p >= '0' && *p <= '9';
}
// Pick up a number.
Token
Lex::gather_number()
{
const char* pstart = this->linebuf_ + this->lineoff_;
const char* p = pstart;
const char* pend = this->linebuf_ + this->linesize_;
Location location = this->location();
bool neg = false;
if (*p == '+')
++p;
else if (*p == '-')
{
++p;
neg = true;
}
const char* pnum = p;
if (*p == '0')
{
int base;
if ((p[1] == 'x' || p[1] == 'X')
&& Lex::is_hex_digit(p[2]))
{
base = 16;
p += 2;
pnum = p;
while (p < pend)
{
if (!Lex::is_hex_digit(*p))
break;
++p;
}
}
else
{
base = 8;
pnum = p;
while (p < pend)
{
if (*p < '0' || *p > '9')
break;
++p;
}
}
// A partial token that looks like an octal literal might actually be the
// beginning of a floating-point or imaginary literal.
if (base == 16 || (*p != '.' && *p != 'i' && !Lex::could_be_exponent(p, pend)))
{
std::string s(pnum, p - pnum);
mpz_t val;
int r = mpz_init_set_str(val, s.c_str(), base);
if (r != 0)
{
if (base == 8)
go_error_at(this->location(), "invalid octal literal");
else
go_error_at(this->location(), "invalid hex literal");
}
if (neg)
mpz_neg(val, val);
this->lineoff_ = p - this->linebuf_;
Token ret = Token::make_integer_token(val, location);
mpz_clear(val);
return ret;
}
}
while (p < pend)
{
if (*p < '0' || *p > '9')
break;
++p;
}
if (*p != '.' && *p != 'i' && !Lex::could_be_exponent(p, pend))
{
std::string s(pnum, p - pnum);
mpz_t val;
int r = mpz_init_set_str(val, s.c_str(), 10);
go_assert(r == 0);
if (neg)
mpz_neg(val, val);
this->lineoff_ = p - this->linebuf_;
Token ret = Token::make_integer_token(val, location);
mpz_clear(val);
return ret;
}
if (*p != 'i')
{
bool dot = *p == '.';
++p;
if (!dot)
{
if (*p == '+' || *p == '-')
++p;
}
while (p < pend)
{
if (*p < '0' || *p > '9')
break;
++p;
}
if (dot && Lex::could_be_exponent(p, pend))
{
++p;
if (*p == '+' || *p == '-')
++p;
while (p < pend)
{
if (*p < '0' || *p > '9')
break;
++p;
}
}
}
std::string s(pnum, p - pnum);
mpfr_t val;
int r = mpfr_init_set_str(val, s.c_str(), 10, GMP_RNDN);
go_assert(r == 0);
if (neg)
mpfr_neg(val, val, GMP_RNDN);
bool is_imaginary = *p == 'i';
if (is_imaginary)
++p;
this->lineoff_ = p - this->linebuf_;
if (is_imaginary)
{
Token ret = Token::make_imaginary_token(val, location);
mpfr_clear(val);
return ret;
}
else
{
Token ret = Token::make_float_token(val, location);
mpfr_clear(val);
return ret;
}
}
// Advance one character, possibly escaped. Return the pointer beyond
// the character. Set *VALUE to the character. Set *IS_CHARACTER if
// this is a character (e.g., 'a' or '\u1234') rather than a byte
// value (e.g., '\001').
const char*
Lex::advance_one_char(const char* p, bool is_single_quote, unsigned int* value,
bool* is_character)
{
*value = 0;
*is_character = true;
if (*p != '\\')
{
bool issued_error;
const char* ret = this->advance_one_utf8_char(p, value, &issued_error);
if (is_single_quote
&& (*value == '\'' || *value == '\n')
&& !issued_error)
go_error_at(this->location(), "invalid character literal");
return ret;
}
else
{
++p;
switch (*p)
{
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
*is_character = false;
if (p[1] >= '0' && p[1] <= '7'
&& p[2] >= '0' && p[2] <= '7')
{
*value = ((Lex::octal_value(p[0]) << 6)
+ (Lex::octal_value(p[1]) << 3)
+ Lex::octal_value(p[2]));
if (*value > 255)
{
go_error_at(this->location(), "invalid octal constant");
*value = 255;
}
return p + 3;
}
go_error_at(this->location(), "invalid octal character");
return (p[1] >= '0' && p[1] <= '7'
? p + 2
: p + 1);
case 'x':
*is_character = false;
if (Lex::is_hex_digit(p[1]) && Lex::is_hex_digit(p[2]))
{
*value = (Lex::hex_val(p[1]) << 4) + Lex::hex_val(p[2]);
return p + 3;
}
go_error_at(this->location(), "invalid hex character");
return (Lex::is_hex_digit(p[1])
? p + 2
: p + 1);
case 'a':
*value = '\a';
return p + 1;
case 'b':
*value = '\b';
return p + 1;
case 'f':
*value = '\f';
return p + 1;
case 'n':
*value = '\n';
return p + 1;
case 'r':
*value = '\r';
return p + 1;
case 't':
*value = '\t';
return p + 1;
case 'v':
*value = '\v';
return p + 1;
case '\\':
*value = '\\';
return p + 1;
case '\'':
if (!is_single_quote)
go_error_at(this->location(), "invalid quoted character");
*value = '\'';
return p + 1;
case '"':
if (is_single_quote)
go_error_at(this->location(), "invalid quoted character");
*value = '"';
return p + 1;
case 'u':
if (Lex::is_hex_digit(p[1]) && Lex::is_hex_digit(p[2])
&& Lex::is_hex_digit(p[3]) && Lex::is_hex_digit(p[4]))
{
*value = ((Lex::hex_val(p[1]) << 12)
+ (Lex::hex_val(p[2]) << 8)
+ (Lex::hex_val(p[3]) << 4)
+ Lex::hex_val(p[4]));
if (*value >= 0xd800 && *value < 0xe000)
{
go_error_at(this->location(),
"invalid unicode code point 0x%x",
*value);
// Use the replacement character.
*value = 0xfffd;
}
return p + 5;
}
go_error_at(this->location(), "invalid little unicode code point");
return p + 1;
case 'U':
if (Lex::is_hex_digit(p[1]) && Lex::is_hex_digit(p[2])
&& Lex::is_hex_digit(p[3]) && Lex::is_hex_digit(p[4])
&& Lex::is_hex_digit(p[5]) && Lex::is_hex_digit(p[6])
&& Lex::is_hex_digit(p[7]) && Lex::is_hex_digit(p[8]))
{
*value = ((Lex::hex_val(p[1]) << 28)
+ (Lex::hex_val(p[2]) << 24)
+ (Lex::hex_val(p[3]) << 20)
+ (Lex::hex_val(p[4]) << 16)
+ (Lex::hex_val(p[5]) << 12)
+ (Lex::hex_val(p[6]) << 8)
+ (Lex::hex_val(p[7]) << 4)
+ Lex::hex_val(p[8]));
if (*value > 0x10ffff
|| (*value >= 0xd800 && *value < 0xe000))
{
go_error_at(this->location(),
"invalid unicode code point 0x%x",
*value);
// Use the replacement character.
*value = 0xfffd;
}
return p + 9;
}
go_error_at(this->location(), "invalid big unicode code point");
return p + 1;
default:
go_error_at(this->location(), "invalid character after %<\\%>");
*value = *p;
return p + 1;
}
}
}
// Append V to STR. IS_CHARACTER is true for a character which should
// be stored in UTF-8, false for a general byte value which should be
// stored directly.
void
Lex::append_char(unsigned int v, bool is_character, std::string* str,
Location location)
{
char buf[4];
size_t len;
if (v <= 0x7f || !is_character)
{
buf[0] = v;
len = 1;
}
else if (v <= 0x7ff)
{
buf[0] = 0xc0 + (v >> 6);
buf[1] = 0x80 + (v & 0x3f);
len = 2;
}
else
{
if (v > 0x10ffff)
{
go_warning_at(location, 0,
"unicode code point 0x%x out of range in string", v);
// Turn it into the "replacement character".
v = 0xfffd;
}
if (v >= 0xd800 && v < 0xe000)
{
go_warning_at(location, 0,
"unicode code point 0x%x is invalid surrogate pair", v);
v = 0xfffd;
}
if (v <= 0xffff)
{
buf[0] = 0xe0 + (v >> 12);
buf[1] = 0x80 + ((v >> 6) & 0x3f);
buf[2] = 0x80 + (v & 0x3f);
len = 3;
}
else
{
buf[0] = 0xf0 + (v >> 18);
buf[1] = 0x80 + ((v >> 12) & 0x3f);
buf[2] = 0x80 + ((v >> 6) & 0x3f);
buf[3] = 0x80 + (v & 0x3f);
len = 4;
}
}
str->append(buf, len);
}
// Pick up a character literal.
Token
Lex::gather_character()
{
++this->lineoff_;
const char* pstart = this->linebuf_ + this->lineoff_;
const char* p = pstart;
unsigned int value;
bool is_character;
p = this->advance_one_char(p, true, &value, &is_character);
if (*p != '\'')
{
go_error_at(this->location(), "unterminated character constant");
this->lineoff_ = p - this->linebuf_;
return this->make_invalid_token();
}
mpz_t val;
mpz_init_set_ui(val, value);
Location location = this->location();
this->lineoff_ = p + 1 - this->linebuf_;
Token ret = Token::make_character_token(val, location);
mpz_clear(val);
return ret;
}
// Pick up a quoted string.
Token
Lex::gather_string()
{
const char* pstart = this->linebuf_ + this->lineoff_ + 1;
const char* p = pstart;
const char* pend = this->linebuf_ + this->linesize_;
std::string value;
while (*p != '"')
{
Location loc = this->location();
unsigned int c;
bool is_character;
this->lineoff_ = p - this->linebuf_;
p = this->advance_one_char(p, false, &c, &is_character);
if (p >= pend)
{
go_error_at(this->location(), "unterminated string");
--p;
break;
}
Lex::append_char(c, is_character, &value, loc);
}
Location location = this->location();
this->lineoff_ = p + 1 - this->linebuf_;
return Token::make_string_token(value, location);
}
// Pick up a raw string.
Token
Lex::gather_raw_string()
{
const char* p = this->linebuf_ + this->lineoff_ + 1;
const char* pend = this->linebuf_ + this->linesize_;
Location location = this->location();
std::string value;
while (true)
{
while (p < pend)
{
if (*p == '`')
{
this->lineoff_ = p + 1 - this->linebuf_;
return Token::make_string_token(value, location);
}
Location loc = this->location();
unsigned int c;
bool issued_error;
this->lineoff_ = p - this->linebuf_;
p = this->advance_one_utf8_char(p, &c, &issued_error);
// "Carriage return characters ('\r') inside raw string literals
// are discarded from the raw string value."
if (c != '\r')
Lex::append_char(c, true, &value, loc);
}
this->lineoff_ = p - this->linebuf_;
if (!this->require_line())
{
go_error_at(location, "unterminated raw string");
return Token::make_string_token(value, location);
}
p = this->linebuf_ + this->lineoff_;
pend = this->linebuf_ + this->linesize_;
}
}
// If C1 C2 C3 are a three character operator, return the code.
Operator
Lex::three_character_operator(char c1, char c2, char c3)
{
if (c3 == '=')
{
if (c1 == '<' && c2 == '<')
return OPERATOR_LSHIFTEQ;
else if (c1 == '>' && c2 == '>')
return OPERATOR_RSHIFTEQ;
else if (c1 == '&' && c2 == '^')
return OPERATOR_BITCLEAREQ;
}
return OPERATOR_INVALID;
}
// If C1 C2 are a two character operator, return the code.
Operator
Lex::two_character_operator(char c1, char c2)
{
switch (c1)
{
case '|':
if (c2 == '|')
return OPERATOR_OROR;
else if (c2 == '=')
return OPERATOR_OREQ;
break;
case '&':
if (c2 == '&')
return OPERATOR_ANDAND;
else if (c2 == '^')
return OPERATOR_BITCLEAR;
else if (c2 == '=')
return OPERATOR_ANDEQ;
break;
case '^':
if (c2 == '=')
return OPERATOR_XOREQ;
break;
case '=':
if (c2 == '=')
return OPERATOR_EQEQ;
break;
case '!':
if (c2 == '=')
return OPERATOR_NOTEQ;
break;
case '<':
if (c2 == '=')
return OPERATOR_LE;
else if (c2 == '<')
return OPERATOR_LSHIFT;
else if (c2 == '-')
return OPERATOR_CHANOP;
break;
case '>':
if (c2 == '=')
return OPERATOR_GE;
else if (c2 == '>')
return OPERATOR_RSHIFT;
break;
case '*':
if (c2 == '=')
return OPERATOR_MULTEQ;
break;
case '/':
if (c2 == '=')
return OPERATOR_DIVEQ;
break;
case '%':
if (c2 == '=')
return OPERATOR_MODEQ;
break;
case '+':
if (c2 == '+')
{
this->add_semi_at_eol_ = true;
return OPERATOR_PLUSPLUS;
}
else if (c2 == '=')
return OPERATOR_PLUSEQ;
break;
case '-':
if (c2 == '-')
{
this->add_semi_at_eol_ = true;
return OPERATOR_MINUSMINUS;
}
else if (c2 == '=')
return OPERATOR_MINUSEQ;
break;
case ':':
if (c2 == '=')
return OPERATOR_COLONEQ;
break;
default:
break;
}
return OPERATOR_INVALID;
}
// If character C is an operator, return the code.
Operator
Lex::one_character_operator(char c)
{
switch (c)
{
case '<':
return OPERATOR_LT;
case '>':
return OPERATOR_GT;
case '+':
return OPERATOR_PLUS;
case '-':
return OPERATOR_MINUS;
case '|':
return OPERATOR_OR;
case '^':
return OPERATOR_XOR;
case '*':
return OPERATOR_MULT;
case '/':
return OPERATOR_DIV;
case '%':
return OPERATOR_MOD;
case '&':
return OPERATOR_AND;
case '!':
return OPERATOR_NOT;
case '=':
return OPERATOR_EQ;
case ':':
return OPERATOR_COLON;
case ';':
return OPERATOR_SEMICOLON;
case '.':
return OPERATOR_DOT;
case ',':
return OPERATOR_COMMA;
case '(':
return OPERATOR_LPAREN;
case ')':
this->add_semi_at_eol_ = true;
return OPERATOR_RPAREN;
case '{':
return OPERATOR_LCURLY;
case '}':
this->add_semi_at_eol_ = true;
return OPERATOR_RCURLY;
case '[':
return OPERATOR_LSQUARE;
case ']':
this->add_semi_at_eol_ = true;
return OPERATOR_RSQUARE;
default:
return OPERATOR_INVALID;
}
}
// Skip a C-style comment.
bool
Lex::skip_c_comment(bool* found_newline)
{
while (true)
{
if (!this->require_line())
{
go_error_at(this->location(), "unterminated comment");
return false;
}
const char* p = this->linebuf_ + this->lineoff_;
const char* pend = this->linebuf_ + this->linesize_;
while (p < pend)
{
if (p[0] == '*' && p + 1 < pend && p[1] == '/')
{
this->lineoff_ = p + 2 - this->linebuf_;
return true;
}
if (p[0] == '\n')
*found_newline = true;
this->lineoff_ = p - this->linebuf_;
unsigned int c;
bool issued_error;
p = this->advance_one_utf8_char(p, &c, &issued_error);
}
this->lineoff_ = p - this->linebuf_;
}
}
// Skip a C++-style comment.
void
Lex::skip_cpp_comment()
{
// Ensure that if EXTERN_ is set, it means that we just saw a
// //extern comment.
this->extern_.clear();
Location loc = this->location();
size_t lineoff = this->lineoff_;
const char* p = this->linebuf_ + lineoff;
const char* pend = this->linebuf_ + this->linesize_;
const char* pcheck = p;
bool saw_error = false;
while (pcheck < pend)
{
this->lineoff_ = pcheck - this->linebuf_;
unsigned int c;
bool issued_error;
pcheck = this->advance_one_utf8_char(pcheck, &c, &issued_error);
if (issued_error)
saw_error = true;
}
if (saw_error)
return;
// Recognize various magic comments at the start of a line.
if (lineoff != 2)
{
// Not at the start of the line. (lineoff == 2 because of the
// two characters in "//").
return;
}
while (pend > p
&& (pend[-1] == ' ' || pend[-1] == '\t'
|| pend[-1] == '\r' || pend[-1] == '\n'))
--pend;
// A C++ comment at the start of the line of the form
// //line FILE:LINENO
// is interpreted as setting the file name and line number of the
// next source line.
if (pend - p > 5 && memcmp(p, "line ", 5) == 0)
{
p += 5;
while (p < pend && *p == ' ')
++p;
const char* pcolon = static_cast<const char*>(memchr(p, ':', pend - p));
if (pcolon != NULL
&& pcolon[1] >= '0'
&& pcolon[1] <= '9')
{
char* plend;
long lineno = strtol(pcolon + 1, &plend, 10);
if (plend > pcolon + 1
&& (plend == pend
|| *plend < '0'
|| *plend > '9')
&& lineno > 0
&& lineno < 0x7fffffff)
{
unsigned int filelen = pcolon - p;
char* file = new char[filelen + 1];
memcpy(file, p, filelen);
file[filelen] = '\0';
this->linemap_->start_file(file, lineno);
this->lineno_ = lineno - 1;
p = plend;
}
}
return;
}
// As a special gccgo extension, a C++ comment at the start of the
// line of the form
// //extern NAME
// which immediately precedes a function declaration means that the
// external name of the function declaration is NAME. This is
// normally used to permit Go code to call a C function.
if (pend - p > 7 && memcmp(p, "extern ", 7) == 0)
{
p += 7;
while (p < pend && (*p == ' ' || *p == '\t'))
++p;
if (pend > p)
this->extern_ = std::string(p, pend - p);
return;
}
// All other special comments start with "go:".
if (pend - p < 4 || memcmp(p, "go:", 3) != 0)
return;
const char *ps = p + 3;
while (ps < pend && *ps != ' ' && *ps != '\t')
++ps;
std::string verb = std::string(p, ps - p);
if (verb == "go:linkname")
{
// As in the gc compiler, set the external link name for a Go symbol.
std::string go_name;
std::string ext_name;
bool is_exported = false;
if (ps < pend)
{
while (ps < pend && (*ps == ' ' || *ps == '\t'))
++ps;
if (ps < pend)
{
const char* pg = ps;
unsigned int c;
bool issued_error;
ps = this->advance_one_utf8_char(ps, &c, &issued_error);
is_exported = Lex::is_unicode_uppercase(c);
while (ps < pend && *ps != ' ' && *ps != '\t')
++ps;
if (ps < pend)
go_name = std::string(pg, ps - pg);
while (ps < pend && (*ps == ' ' || *ps == '\t'))
++ps;
}
if (ps < pend)
{
const char* pc = ps;
while (ps < pend && *ps != ' ' && *ps != '\t')
++ps;
if (ps <= pend)
ext_name = std::string(pc, ps - pc);
}
if (ps != pend)
{
go_name.clear();
ext_name.clear();
}
}
if (go_name.empty() || ext_name.empty())
go_error_at(loc, "usage: //go:linkname localname linkname");
else
{
if (this->linknames_ == NULL)
this->linknames_ = new Linknames();
(*this->linknames_)[go_name] = Linkname(ext_name, is_exported, loc);
}
}
else if (verb == "go:nointerface")
{
// For field tracking analysis: a //go:nointerface comment means
// that the next interface method should not be stored in the
// type descriptor. This permits it to be discarded if it is
// not needed.
this->pragmas_ |= GOPRAGMA_NOINTERFACE;
}
else if (verb == "go:noescape")
{
// Applies to the next function declaration. Any arguments do
// not escape.
// FIXME: Not implemented.
this->pragmas_ |= GOPRAGMA_NOESCAPE;
}
else if (verb == "go:nosplit")
{
// Applies to the next function. Do not split the stack when
// entering the function.
this->pragmas_ |= GOPRAGMA_NOSPLIT;
}
else if (verb == "go:noinline")
{
// Applies to the next function. Do not inline the function.
this->pragmas_ |= GOPRAGMA_NOINLINE;
}
else if (verb == "go:notinheap")
{
// Applies to the next type. The type does not live in the heap.
this->pragmas_ |= GOPRAGMA_NOTINHEAP;
}
else if (verb == "go:systemstack")
{
// Applies to the next function. It must run on the system stack.
// FIXME: Should only work when compiling the runtime package.
// FIXME: Not implemented.
this->pragmas_ |= GOPRAGMA_SYSTEMSTACK;
}
else if (verb == "go:nowritebarrier")
{
// Applies to the next function. If the function needs to use
// any write barriers, it should emit an error instead.
// FIXME: Should only work when compiling the runtime package.
this->pragmas_ |= GOPRAGMA_NOWRITEBARRIER;
}
else if (verb == "go:nowritebarrierrec")
{
// Applies to the next function. If the function, or any
// function that it calls, needs to use any write barriers, it
// should emit an error instead.
// FIXME: Should only work when compiling the runtime package.
this->pragmas_ |= GOPRAGMA_NOWRITEBARRIERREC;
}
else if (verb == "go:yeswritebarrierrec")
{
// Applies to the next function. Disables go:nowritebarrierrec
// when looking at callees; write barriers are permitted here.
// FIXME: Should only work when compiling the runtime package.
this->pragmas_ |= GOPRAGMA_YESWRITEBARRIERREC;
}
else if (verb == "go:cgo_unsafe_args")
{
// Applies to the next function. Taking the address of any
// argument implies taking the address of all arguments.
// FIXME: Not implemented.
this->pragmas_ |= GOPRAGMA_CGOUNSAFEARGS;
}
else if (verb == "go:uintptrescapes")
{
// Applies to the next function. If an argument is a pointer
// converted to uintptr, then the pointer escapes.
// FIXME: Not implemented.
this->pragmas_ |= GOPRAGMA_UINTPTRESCAPES;
}
}
// The Unicode tables use this struct.
struct Unicode_range
{
// The low end of the range.
unsigned int low;
// The high end of the range.
unsigned int high;
// The stride. This entries represents low, low + stride, low + 2 *
// stride, etc., up to high.
unsigned int stride;
};
// A table of whitespace characters--Unicode code points classified as
// "Space", "C" locale whitespace characters, the "next line" control
// character (0085), the line separator (2028), the paragraph
// separator (2029), and the "zero-width non-break space" (feff).
static const Unicode_range unicode_space[] =
{
{ 0x0009, 0x000d, 1 },
{ 0x0020, 0x0020, 1 },
{ 0x0085, 0x0085, 1 },
{ 0x00a0, 0x00a0, 1 },
{ 0x1680, 0x1680, 1 },
{ 0x180e, 0x180e, 1 },
{ 0x2000, 0x200a, 1 },
{ 0x2028, 0x2029, 1 },
{ 0x202f, 0x202f, 1 },
{ 0x205f, 0x205f, 1 },
{ 0x3000, 0x3000, 1 },
{ 0xfeff, 0xfeff, 1 },
};
// A table of Unicode digits--Unicode code points classified as
// "Digit".
static const Unicode_range unicode_digits[] =
{
{ 0x0030, 0x0039, 1},
{ 0x0660, 0x0669, 1},
{ 0x06f0, 0x06f9, 1},
{ 0x07c0, 0x07c9, 1},
{ 0x0966, 0x096f, 1},
{ 0x09e6, 0x09ef, 1},
{ 0x0a66, 0x0a6f, 1},
{ 0x0ae6, 0x0aef, 1},
{ 0x0b66, 0x0b6f, 1},
{ 0x0be6, 0x0bef, 1},
{ 0x0c66, 0x0c6f, 1},
{ 0x0ce6, 0x0cef, 1},
{ 0x0d66, 0x0d6f, 1},
{ 0x0e50, 0x0e59, 1},
{ 0x0ed0, 0x0ed9, 1},
{ 0x0f20, 0x0f29, 1},
{ 0x1040, 0x1049, 1},
{ 0x17e0, 0x17e9, 1},
{ 0x1810, 0x1819, 1},
{ 0x1946, 0x194f, 1},
{ 0x19d0, 0x19d9, 1},
{ 0x1b50, 0x1b59, 1},
{ 0xff10, 0xff19, 1},
{ 0x104a0, 0x104a9, 1},
{ 0x1d7ce, 0x1d7ff, 1},
};
// A table of Unicode letters--Unicode code points classified as
// "Letter".
static const Unicode_range unicode_letters[] =
{
{ 0x0041, 0x005a, 1},
{ 0x0061, 0x007a, 1},
{ 0x00aa, 0x00b5, 11},
{ 0x00ba, 0x00c0, 6},
{ 0x00c1, 0x00d6, 1},
{ 0x00d8, 0x00f6, 1},
{ 0x00f8, 0x02c1, 1},
{ 0x02c6, 0x02d1, 1},
{ 0x02e0, 0x02e4, 1},
{ 0x02ec, 0x02ee, 2},
{ 0x0370, 0x0374, 1},
{ 0x0376, 0x0377, 1},
{ 0x037a, 0x037d, 1},
{ 0x037f, 0x0386, 7},
{ 0x0388, 0x038a, 1},
{ 0x038c, 0x038e, 2},
{ 0x038f, 0x03a1, 1},
{ 0x03a3, 0x03f5, 1},
{ 0x03f7, 0x0481, 1},
{ 0x048a, 0x052f, 1},
{ 0x0531, 0x0556, 1},
{ 0x0559, 0x0561, 8},
{ 0x0562, 0x0587, 1},
{ 0x05d0, 0x05ea, 1},
{ 0x05f0, 0x05f2, 1},
{ 0x0620, 0x064a, 1},
{ 0x066e, 0x066f, 1},
{ 0x0671, 0x06d3, 1},
{ 0x06d5, 0x06e5, 16},
{ 0x06e6, 0x06ee, 8},
{ 0x06ef, 0x06fa, 11},
{ 0x06fb, 0x06fc, 1},
{ 0x06ff, 0x0710, 17},
{ 0x0712, 0x072f, 1},
{ 0x074d, 0x07a5, 1},
{ 0x07b1, 0x07ca, 25},
{ 0x07cb, 0x07ea, 1},
{ 0x07f4, 0x07f5, 1},
{ 0x07fa, 0x0800, 6},
{ 0x0801, 0x0815, 1},
{ 0x081a, 0x0824, 10},
{ 0x0828, 0x0840, 24},
{ 0x0841, 0x0858, 1},
{ 0x08a0, 0x08b4, 1},
{ 0x0904, 0x0939, 1},
{ 0x093d, 0x0950, 19},
{ 0x0958, 0x0961, 1},
{ 0x0971, 0x0980, 1},
{ 0x0985, 0x098c, 1},
{ 0x098f, 0x0990, 1},
{ 0x0993, 0x09a8, 1},
{ 0x09aa, 0x09b0, 1},
{ 0x09b2, 0x09b6, 4},
{ 0x09b7, 0x09b9, 1},
{ 0x09bd, 0x09ce, 17},
{ 0x09dc, 0x09dd, 1},
{ 0x09df, 0x09e1, 1},
{ 0x09f0, 0x09f1, 1},
{ 0x0a05, 0x0a0a, 1},
{ 0x0a0f, 0x0a10, 1},
{ 0x0a13, 0x0a28, 1},
{ 0x0a2a, 0x0a30, 1},
{ 0x0a32, 0x0a33, 1},
{ 0x0a35, 0x0a36, 1},
{ 0x0a38, 0x0a39, 1},
{ 0x0a59, 0x0a5c, 1},
{ 0x0a5e, 0x0a72, 20},
{ 0x0a73, 0x0a74, 1},
{ 0x0a85, 0x0a8d, 1},
{ 0x0a8f, 0x0a91, 1},
{ 0x0a93, 0x0aa8, 1},
{ 0x0aaa, 0x0ab0, 1},
{ 0x0ab2, 0x0ab3, 1},
{ 0x0ab5, 0x0ab9, 1},
{ 0x0abd, 0x0ad0, 19},
{ 0x0ae0, 0x0ae1, 1},
{ 0x0af9, 0x0b05, 12},
{ 0x0b06, 0x0b0c, 1},
{ 0x0b0f, 0x0b10, 1},
{ 0x0b13, 0x0b28, 1},
{ 0x0b2a, 0x0b30, 1},
{ 0x0b32, 0x0b33, 1},
{ 0x0b35, 0x0b39, 1},
{ 0x0b3d, 0x0b5c, 31},
{ 0x0b5d, 0x0b5f, 2},
{ 0x0b60, 0x0b61, 1},
{ 0x0b71, 0x0b83, 18},
{ 0x0b85, 0x0b8a, 1},
{ 0x0b8e, 0x0b90, 1},
{ 0x0b92, 0x0b95, 1},
{ 0x0b99, 0x0b9a, 1},
{ 0x0b9c, 0x0b9e, 2},
{ 0x0b9f, 0x0ba3, 4},
{ 0x0ba4, 0x0ba8, 4},
{ 0x0ba9, 0x0baa, 1},
{ 0x0bae, 0x0bb9, 1},
{ 0x0bd0, 0x0c05, 53},
{ 0x0c06, 0x0c0c, 1},
{ 0x0c0e, 0x0c10, 1},
{ 0x0c12, 0x0c28, 1},
{ 0x0c2a, 0x0c39, 1},
{ 0x0c3d, 0x0c58, 27},
{ 0x0c59, 0x0c5a, 1},
{ 0x0c60, 0x0c61, 1},
{ 0x0c85, 0x0c8c, 1},
{ 0x0c8e, 0x0c90, 1},
{ 0x0c92, 0x0ca8, 1},
{ 0x0caa, 0x0cb3, 1},
{ 0x0cb5, 0x0cb9, 1},
{ 0x0cbd, 0x0cde, 33},
{ 0x0ce0, 0x0ce1, 1},
{ 0x0cf1, 0x0cf2, 1},
{ 0x0d05, 0x0d0c, 1},
{ 0x0d0e, 0x0d10, 1},
{ 0x0d12, 0x0d3a, 1},
{ 0x0d3d, 0x0d5f, 17},
{ 0x0d60, 0x0d61, 1},
{ 0x0d7a, 0x0d7f, 1},
{ 0x0d85, 0x0d96, 1},
{ 0x0d9a, 0x0db1, 1},
{ 0x0db3, 0x0dbb, 1},
{ 0x0dbd, 0x0dc0, 3},
{ 0x0dc1, 0x0dc6, 1},
{ 0x0e01, 0x0e30, 1},
{ 0x0e32, 0x0e33, 1},
{ 0x0e40, 0x0e46, 1},
{ 0x0e81, 0x0e82, 1},
{ 0x0e84, 0x0e87, 3},
{ 0x0e88, 0x0e8a, 2},
{ 0x0e8d, 0x0e94, 7},
{ 0x0e95, 0x0e97, 1},
{ 0x0e99, 0x0e9f, 1},
{ 0x0ea1, 0x0ea3, 1},
{ 0x0ea5, 0x0ea7, 2},
{ 0x0eaa, 0x0eab, 1},
{ 0x0ead, 0x0eb0, 1},
{ 0x0eb2, 0x0eb3, 1},
{ 0x0ebd, 0x0ec0, 3},
{ 0x0ec1, 0x0ec4, 1},
{ 0x0ec6, 0x0edc, 22},
{ 0x0edd, 0x0edf, 1},
{ 0x0f00, 0x0f40, 64},
{ 0x0f41, 0x0f47, 1},
{ 0x0f49, 0x0f6c, 1},
{ 0x0f88, 0x0f8c, 1},
{ 0x1000, 0x102a, 1},
{ 0x103f, 0x1050, 17},
{ 0x1051, 0x1055, 1},
{ 0x105a, 0x105d, 1},
{ 0x1061, 0x1065, 4},
{ 0x1066, 0x106e, 8},
{ 0x106f, 0x1070, 1},
{ 0x1075, 0x1081, 1},
{ 0x108e, 0x10a0, 18},
{ 0x10a1, 0x10c5, 1},
{ 0x10c7, 0x10cd, 6},
{ 0x10d0, 0x10fa, 1},
{ 0x10fc, 0x1248, 1},
{ 0x124a, 0x124d, 1},
{ 0x1250, 0x1256, 1},
{ 0x1258, 0x125a, 2},
{ 0x125b, 0x125d, 1},
{ 0x1260, 0x1288, 1},
{ 0x128a, 0x128d, 1},
{ 0x1290, 0x12b0, 1},
{ 0x12b2, 0x12b5, 1},
{ 0x12b8, 0x12be, 1},
{ 0x12c0, 0x12c2, 2},
{ 0x12c3, 0x12c5, 1},
{ 0x12c8, 0x12d6, 1},
{ 0x12d8, 0x1310, 1},
{ 0x1312, 0x1315, 1},
{ 0x1318, 0x135a, 1},
{ 0x1380, 0x138f, 1},
{ 0x13a0, 0x13f5, 1},
{ 0x13f8, 0x13fd, 1},
{ 0x1401, 0x166c, 1},
{ 0x166f, 0x167f, 1},
{ 0x1681, 0x169a, 1},
{ 0x16a0, 0x16ea, 1},
{ 0x16f1, 0x16f8, 1},
{ 0x1700, 0x170c, 1},
{ 0x170e, 0x1711, 1},
{ 0x1720, 0x1731, 1},
{ 0x1740, 0x1751, 1},
{ 0x1760, 0x176c, 1},
{ 0x176e, 0x1770, 1},
{ 0x1780, 0x17b3, 1},
{ 0x17d7, 0x17dc, 5},
{ 0x1820, 0x1877, 1},
{ 0x1880, 0x18a8, 1},
{ 0x18aa, 0x18b0, 6},
{ 0x18b1, 0x18f5, 1},
{ 0x1900, 0x191e, 1},
{ 0x1950, 0x196d, 1},
{ 0x1970, 0x1974, 1},
{ 0x1980, 0x19ab, 1},
{ 0x19b0, 0x19c9, 1},
{ 0x1a00, 0x1a16, 1},
{ 0x1a20, 0x1a54, 1},
{ 0x1aa7, 0x1b05, 94},
{ 0x1b06, 0x1b33, 1},
{ 0x1b45, 0x1b4b, 1},
{ 0x1b83, 0x1ba0, 1},
{ 0x1bae, 0x1baf, 1},
{ 0x1bba, 0x1be5, 1},
{ 0x1c00, 0x1c23, 1},
{ 0x1c4d, 0x1c4f, 1},
{ 0x1c5a, 0x1c7d, 1},
{ 0x1ce9, 0x1cec, 1},
{ 0x1cee, 0x1cf1, 1},
{ 0x1cf5, 0x1cf6, 1},
{ 0x1d00, 0x1dbf, 1},
{ 0x1e00, 0x1f15, 1},
{ 0x1f18, 0x1f1d, 1},
{ 0x1f20, 0x1f45, 1},
{ 0x1f48, 0x1f4d, 1},
{ 0x1f50, 0x1f57, 1},
{ 0x1f59, 0x1f5f, 2},
{ 0x1f60, 0x1f7d, 1},
{ 0x1f80, 0x1fb4, 1},
{ 0x1fb6, 0x1fbc, 1},
{ 0x1fbe, 0x1fc2, 4},
{ 0x1fc3, 0x1fc4, 1},
{ 0x1fc6, 0x1fcc, 1},
{ 0x1fd0, 0x1fd3, 1},
{ 0x1fd6, 0x1fdb, 1},
{ 0x1fe0, 0x1fec, 1},
{ 0x1ff2, 0x1ff4, 1},
{ 0x1ff6, 0x1ffc, 1},
{ 0x2071, 0x207f, 14},
{ 0x2090, 0x209c, 1},
{ 0x2102, 0x2107, 5},
{ 0x210a, 0x2113, 1},
{ 0x2115, 0x2119, 4},
{ 0x211a, 0x211d, 1},
{ 0x2124, 0x212a, 2},
{ 0x212b, 0x212d, 1},
{ 0x212f, 0x2139, 1},
{ 0x213c, 0x213f, 1},
{ 0x2145, 0x2149, 1},
{ 0x214e, 0x2183, 53},
{ 0x2184, 0x2c00, 2684},
{ 0x2c01, 0x2c2e, 1},
{ 0x2c30, 0x2c5e, 1},
{ 0x2c60, 0x2ce4, 1},
{ 0x2ceb, 0x2cee, 1},
{ 0x2cf2, 0x2cf3, 1},
{ 0x2d00, 0x2d25, 1},
{ 0x2d27, 0x2d2d, 6},
{ 0x2d30, 0x2d67, 1},
{ 0x2d6f, 0x2d80, 17},
{ 0x2d81, 0x2d96, 1},
{ 0x2da0, 0x2da6, 1},
{ 0x2da8, 0x2dae, 1},
{ 0x2db0, 0x2db6, 1},
{ 0x2db8, 0x2dbe, 1},
{ 0x2dc0, 0x2dc6, 1},
{ 0x2dc8, 0x2dce, 1},
{ 0x2dd0, 0x2dd6, 1},
{ 0x2dd8, 0x2dde, 1},
{ 0x2e2f, 0x3005, 470},
{ 0x3006, 0x3031, 43},
{ 0x3032, 0x3035, 1},
{ 0x303b, 0x303c, 1},
{ 0x3041, 0x3096, 1},
{ 0x309d, 0x309f, 1},
{ 0x30a1, 0x30fa, 1},
{ 0x30fc, 0x30ff, 1},
{ 0x3105, 0x312d, 1},
{ 0x3131, 0x318e, 1},
{ 0x31a0, 0x31ba, 1},
{ 0x31f0, 0x31ff, 1},
{ 0x3400, 0x4db5, 1},
{ 0x4e00, 0x9fd5, 1},
{ 0xa000, 0xa48c, 1},
{ 0xa4d0, 0xa4fd, 1},
{ 0xa500, 0xa60c, 1},
{ 0xa610, 0xa61f, 1},
{ 0xa62a, 0xa62b, 1},
{ 0xa640, 0xa66e, 1},
{ 0xa67f, 0xa69d, 1},
{ 0xa6a0, 0xa6e5, 1},
{ 0xa717, 0xa71f, 1},
{ 0xa722, 0xa788, 1},
{ 0xa78b, 0xa7ad, 1},
{ 0xa7b0, 0xa7b7, 1},
{ 0xa7f7, 0xa801, 1},
{ 0xa803, 0xa805, 1},
{ 0xa807, 0xa80a, 1},
{ 0xa80c, 0xa822, 1},
{ 0xa840, 0xa873, 1},
{ 0xa882, 0xa8b3, 1},
{ 0xa8f2, 0xa8f7, 1},
{ 0xa8fb, 0xa8fd, 2},
{ 0xa90a, 0xa925, 1},
{ 0xa930, 0xa946, 1},
{ 0xa960, 0xa97c, 1},
{ 0xa984, 0xa9b2, 1},
{ 0xa9cf, 0xa9e0, 17},
{ 0xa9e1, 0xa9e4, 1},
{ 0xa9e6, 0xa9ef, 1},
{ 0xa9fa, 0xa9fe, 1},
{ 0xaa00, 0xaa28, 1},
{ 0xaa40, 0xaa42, 1},
{ 0xaa44, 0xaa4b, 1},
{ 0xaa60, 0xaa76, 1},
{ 0xaa7a, 0xaa7e, 4},
{ 0xaa7f, 0xaaaf, 1},
{ 0xaab1, 0xaab5, 4},
{ 0xaab6, 0xaab9, 3},
{ 0xaaba, 0xaabd, 1},
{ 0xaac0, 0xaac2, 2},
{ 0xaadb, 0xaadd, 1},
{ 0xaae0, 0xaaea, 1},
{ 0xaaf2, 0xaaf4, 1},
{ 0xab01, 0xab06, 1},
{ 0xab09, 0xab0e, 1},
{ 0xab11, 0xab16, 1},
{ 0xab20, 0xab26, 1},
{ 0xab28, 0xab2e, 1},
{ 0xab30, 0xab5a, 1},
{ 0xab5c, 0xab65, 1},
{ 0xab70, 0xabe2, 1},
{ 0xac00, 0xd7a3, 1},
{ 0xd7b0, 0xd7c6, 1},
{ 0xd7cb, 0xd7fb, 1},
{ 0xf900, 0xfa6d, 1},
{ 0xfa70, 0xfad9, 1},
{ 0xfb00, 0xfb06, 1},
{ 0xfb13, 0xfb17, 1},
{ 0xfb1d, 0xfb1f, 2},
{ 0xfb20, 0xfb28, 1},
{ 0xfb2a, 0xfb36, 1},
{ 0xfb38, 0xfb3c, 1},
{ 0xfb3e, 0xfb40, 2},
{ 0xfb41, 0xfb43, 2},
{ 0xfb44, 0xfb46, 2},
{ 0xfb47, 0xfbb1, 1},
{ 0xfbd3, 0xfd3d, 1},
{ 0xfd50, 0xfd8f, 1},
{ 0xfd92, 0xfdc7, 1},
{ 0xfdf0, 0xfdfb, 1},
{ 0xfe70, 0xfe74, 1},
{ 0xfe76, 0xfefc, 1},
{ 0xff21, 0xff3a, 1},
{ 0xff41, 0xff5a, 1},
{ 0xff66, 0xffbe, 1},
{ 0xffc2, 0xffc7, 1},
{ 0xffca, 0xffcf, 1},
{ 0xffd2, 0xffd7, 1},
{ 0xffda, 0xffdc, 1},
{ 0x10000, 0x1000b, 1},
{ 0x1000d, 0x10026, 1},
{ 0x10028, 0x1003a, 1},
{ 0x1003c, 0x1003d, 1},
{ 0x1003f, 0x1004d, 1},
{ 0x10050, 0x1005d, 1},
{ 0x10080, 0x100fa, 1},
{ 0x10280, 0x1029c, 1},
{ 0x102a0, 0x102d0, 1},
{ 0x10300, 0x1031f, 1},
{ 0x10330, 0x10340, 1},
{ 0x10342, 0x10349, 1},
{ 0x10350, 0x10375, 1},
{ 0x10380, 0x1039d, 1},
{ 0x103a0, 0x103c3, 1},
{ 0x103c8, 0x103cf, 1},
{ 0x10400, 0x1049d, 1},
{ 0x10500, 0x10527, 1},
{ 0x10530, 0x10563, 1},
{ 0x10600, 0x10736, 1},
{ 0x10740, 0x10755, 1},
{ 0x10760, 0x10767, 1},
{ 0x10800, 0x10805, 1},
{ 0x10808, 0x1080a, 2},
{ 0x1080b, 0x10835, 1},
{ 0x10837, 0x10838, 1},
{ 0x1083c, 0x1083f, 3},
{ 0x10840, 0x10855, 1},
{ 0x10860, 0x10876, 1},
{ 0x10880, 0x1089e, 1},
{ 0x108e0, 0x108f2, 1},
{ 0x108f4, 0x108f5, 1},
{ 0x10900, 0x10915, 1},
{ 0x10920, 0x10939, 1},
{ 0x10980, 0x109b7, 1},
{ 0x109be, 0x109bf, 1},
{ 0x10a00, 0x10a10, 16},
{ 0x10a11, 0x10a13, 1},
{ 0x10a15, 0x10a17, 1},
{ 0x10a19, 0x10a33, 1},
{ 0x10a60, 0x10a7c, 1},
{ 0x10a80, 0x10a9c, 1},
{ 0x10ac0, 0x10ac7, 1},
{ 0x10ac9, 0x10ae4, 1},
{ 0x10b00, 0x10b35, 1},
{ 0x10b40, 0x10b55, 1},
{ 0x10b60, 0x10b72, 1},
{ 0x10b80, 0x10b91, 1},
{ 0x10c00, 0x10c48, 1},
{ 0x10c80, 0x10cb2, 1},
{ 0x10cc0, 0x10cf2, 1},
{ 0x11003, 0x11037, 1},
{ 0x11083, 0x110af, 1},
{ 0x110d0, 0x110e8, 1},
{ 0x11103, 0x11126, 1},
{ 0x11150, 0x11172, 1},
{ 0x11176, 0x11183, 13},
{ 0x11184, 0x111b2, 1},
{ 0x111c1, 0x111c4, 1},
{ 0x111da, 0x111dc, 2},
{ 0x11200, 0x11211, 1},
{ 0x11213, 0x1122b, 1},
{ 0x11280, 0x11286, 1},
{ 0x11288, 0x1128a, 2},
{ 0x1128b, 0x1128d, 1},
{ 0x1128f, 0x1129d, 1},
{ 0x1129f, 0x112a8, 1},
{ 0x112b0, 0x112de, 1},
{ 0x11305, 0x1130c, 1},
{ 0x1130f, 0x11310, 1},
{ 0x11313, 0x11328, 1},
{ 0x1132a, 0x11330, 1},
{ 0x11332, 0x11333, 1},
{ 0x11335, 0x11339, 1},
{ 0x1133d, 0x11350, 19},
{ 0x1135d, 0x11361, 1},
{ 0x11480, 0x114af, 1},
{ 0x114c4, 0x114c5, 1},
{ 0x114c7, 0x11580, 185},
{ 0x11581, 0x115ae, 1},
{ 0x115d8, 0x115db, 1},
{ 0x11600, 0x1162f, 1},
{ 0x11644, 0x11680, 60},
{ 0x11681, 0x116aa, 1},
{ 0x11700, 0x11719, 1},