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started working on parsing labels

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This commit is contained in:
hyunghwan.chung 2019-07-17 09:52:26 +00:00
parent dbe3c1cc07
commit 1c0b23fa97
4 changed files with 123 additions and 33 deletions
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2
moo/kernel/test-003.moo
View File

@ -91,6 +91,8 @@ class MyObject(Object)
| tb |
tb := tc at: idx.
System log(System.Log.INFO, idx asString, (if (tb value) { " PASS" } else { " FAIL" }), "\n").
/*a:
b: c:*/
].
Exception signal: 'experiment with exception signalling'.

150
moo/lib/comp.c
View File

@ -984,7 +984,6 @@ static MOO_INLINE int is_token_keyword (moo_t* moo, voca_id_t id)
return TOKEN_TYPE(moo) == MOO_IOTOK_KEYWORD && does_token_name_match(moo, id);
}
static MOO_INLINE int add_token_str (moo_t* moo, const moo_ooch_t* ptr, moo_oow_t len)
{
moo_oocs_t tmp;
@ -4819,7 +4818,7 @@ static int compile_block_expression (moo_t* moo)
moo_cunit_class_t* cc = (moo_cunit_class_t*)moo->c->cunit;
moo_oow_t jump_inst_pos;
moo_oow_t saved_tmpr_count, saved_tmprs_len;
moo_oow_t block_arg_count, block_tmpr_count;
moo_oow_t block_arg_count, block_tmpr_count, code_start;
moo_ioloc_t block_loc, colon_loc, tmpr_loc;
/*
@ -4931,6 +4930,7 @@ static int compile_block_expression (moo_t* moo)
if (emit_single_param_instruction(moo, BCODE_JUMP_FORWARD_0, MAX_CODE_JUMP, &block_loc) <= -1) return -1;
/* compile statements inside a block */
#if 0
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK)
{
/* the block is empty */
@ -4938,25 +4938,83 @@ static int compile_block_expression (moo_t* moo)
}
else
{
int empty = 1, n;
while (TOKEN_TYPE(moo) != MOO_IOTOK_EOF)
{
if (compile_block_statement(moo) <= -1) return -1;
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
else if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
n = compile_block_statement(moo);
if (n <= -1) return -1;
if (n == 8888)
{
moo_ioloc_t period_loc = *TOKEN_LOC(moo);
GET_TOKEN (moo);
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, &period_loc) <= -1) return -1;
/* compile_block_statement() processed non-statement item like a jump label. */
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK)
{
if (empty && emit_byte_instruction(moo, BCODE_PUSH_NIL, TOKEN_LOC(moo)) <= -1) return -1;
break;
}
}
else
{
moo_setsynerr (moo, MOO_SYNERR_RBRACK, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
/* a proper statement has been processed in compile_block_statemnt */
empty = 0;
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
else if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
{
moo_ioloc_t period_loc = *TOKEN_LOC(moo);
GET_TOKEN (moo);
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, &period_loc) <= -1) return -1;
}
else
{
moo_setsynerr (moo, MOO_SYNERR_RBRACK, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
}
}
}
}
#else
code_start = cc->mth.code.len;
if (TOKEN_TYPE(moo) != MOO_IOTOK_RBRACK)
{
while (TOKEN_TYPE(moo) != MOO_IOTOK_EOF)
{
int n;
n = compile_block_statement(moo);
if (n <= -1) return -1;
if (n == 8888)
{
/* compile_block_statement() processed non-statement item like a jump label. */
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
}
else
{
/* a proper statement has been processed in compile_block_statemnt */
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
else if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
{
moo_ioloc_t period_loc = *TOKEN_LOC(moo);
GET_TOKEN (moo);
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK) break;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, &period_loc) <= -1) return -1;
}
else
{
moo_setsynerr (moo, MOO_SYNERR_RBRACK, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
}
}
}
}
if (cc->mth.code.len == code_start)
{
/* the block is empty */
if (emit_byte_instruction(moo, BCODE_PUSH_NIL, TOKEN_LOC(moo)) <= -1) return -1;
}
#endif
if (emit_byte_instruction(moo, BCODE_RETURN_FROM_BLOCK, TOKEN_LOC(moo)) <= -1) return -1;
@ -5996,20 +6054,30 @@ static int compile_braced_block (moo_t* moo)
{
while (TOKEN_TYPE(moo) != MOO_IOTOK_EOF)
{
if (compile_block_statement(moo) <= -1) return -1;
int n;
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
else if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
n = compile_block_statement(moo);
if (n <= -1) return -1;
if (n == 8888)
{
moo_ioloc_t period_loc = *TOKEN_LOC(moo);
GET_TOKEN (moo);
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, &period_loc) <= -1) return -1;
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
}
else
{
moo_setsynerr (moo, MOO_SYNERR_RBRACE, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
else if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
{
moo_ioloc_t period_loc = *TOKEN_LOC(moo);
GET_TOKEN (moo);
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, &period_loc) <= -1) return -1;
}
else
{
moo_setsynerr (moo, MOO_SYNERR_RBRACE, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
}
}
}
}
@ -6652,6 +6720,14 @@ static int compile_special_statement (moo_t* moo)
inject_continue_to_loop(moo, &start_loc): /* in a do-while loop, the position to the conditional is not known yet */
emit_backward_jump_instruction(moo, BCODE_JUMP_BACKWARD_0, cc->mth.code.len - cc->mth.loop->startpos, &start_loc);
}
else if (TOKEN_TYPE(moo) == MOO_IOTOK_KEYWORD)
{
/* this is a label */
/* remember the label location with the block depth */
MOO_DEBUG2 (moo, "LABEL => %.*js\n", TOKEN_NAME_LEN(moo), TOKEN_NAME_PTR(moo));
GET_TOKEN (moo);
return 8888; /* indicates that non-statement has been seen and processed.*/
}
return 9999; /* to indicate that no special statement has been seen and processed */
}
@ -6744,24 +6820,36 @@ static int compile_method_statements (moo_t* moo)
{
do
{
if (compile_method_statement(moo) <= -1) return -1;
int n;
if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
n = compile_method_statement(moo);
if (n <= -1) return -1;
if (n == 8888)
{
/* period after a statement */
GET_TOKEN (moo);
/* a non-statement such as label has been processed */
if (TOKEN_TYPE(moo) == MOO_IOTOK_EOF ||
TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
}
else
{
if (TOKEN_TYPE(moo) == MOO_IOTOK_EOF ||
TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
/* a proper statement has been processed */
if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
{
/* period after a statement */
GET_TOKEN (moo);
/* not a period, EOF, nor } */
moo_setsynerr (moo, MOO_SYNERR_PERIOD, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
if (TOKEN_TYPE(moo) == MOO_IOTOK_EOF ||
TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
}
else
{
if (TOKEN_TYPE(moo) == MOO_IOTOK_EOF ||
TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE) break;
/* not a period, EOF, nor } */
moo_setsynerr (moo, MOO_SYNERR_PERIOD, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
}
}
}
while (1);

2
moo/lib/moo-prv.h
View File

@ -315,7 +315,7 @@ enum moo_iotok_type_t
MOO_IOTOK_IDENT,
MOO_IOTOK_IDENT_DOTTED,
MOO_IOTOK_BINSEL,
MOO_IOTOK_KEYWORD,
MOO_IOTOK_KEYWORD, /* word ending with : such as basicAt:*/
MOO_IOTOK_ASSIGN, /* := */
MOO_IOTOK_COLON, /* : */
MOO_IOTOK_DHASH, /* ## */