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8a19f60386
- Reorder README to have implementation list after "learning tool" bullet. - This also moves tests/ and libs/ into impls. It would be preferrable to have these directories at the top level. However, this causes difficulties with the wasm implementations which need pre-open directories and have trouble with paths starting with "../../". So in lieu of that, symlink those directories to the top-level. - Move the run_argv_test.sh script into the tests directory for general hygiene.
74 lines
1.7 KiB
SQL
74 lines
1.7 KiB
SQL
@io.sql
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@types.sql
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@reader.sql
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@printer.sql
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CREATE OR REPLACE PACKAGE mal IS
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FUNCTION MAIN(args varchar DEFAULT '()') RETURN integer;
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END mal;
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/
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CREATE OR REPLACE PACKAGE BODY mal IS
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FUNCTION MAIN(args varchar DEFAULT '()') RETURN integer IS
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M types.mal_table; -- general mal value memory pool
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H types.map_entry_table; -- hashmap memory pool
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line CLOB;
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-- read
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FUNCTION READ(line varchar) RETURN integer IS
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BEGIN
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RETURN reader.read_str(M, H, line);
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END;
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-- eval
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FUNCTION EVAL(ast integer, env varchar) RETURN integer IS
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BEGIN
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RETURN ast;
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END;
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-- print
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FUNCTION PRINT(exp integer) RETURN varchar IS
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BEGIN
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RETURN printer.pr_str(M, H, exp);
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END;
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-- repl
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FUNCTION REP(line varchar) RETURN varchar IS
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BEGIN
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RETURN PRINT(EVAL(READ(line), ''));
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END;
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BEGIN
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-- initialize memory pools
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M := types.mem_new();
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H := types.map_entry_table();
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WHILE true LOOP
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BEGIN
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line := io.readline('user> ', 0);
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IF line = EMPTY_CLOB() THEN CONTINUE; END IF;
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IF line IS NOT NULL THEN
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io.writeline(REP(line));
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END IF;
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EXCEPTION WHEN OTHERS THEN
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IF SQLCODE = -20001 THEN -- io read stream closed
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io.writeline('closing stream 1');
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io.close(1); -- close output stream
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RETURN 0;
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END IF;
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io.writeline('Error: ' || SQLERRM);
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io.writeline(dbms_utility.format_error_backtrace);
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END;
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END LOOP;
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END;
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END mal;
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/
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show errors;
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quit;
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