Blame: impls/vimscript/step6_file.vim - kanaka/mal

kanaka / mal UNCLAIMED

mal - Make a Lisp

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Vimscript implementation 2015-10-20 15:02:00 -04:00			`source readline.vim`
			`source types.vim`
			`source reader.vim`
			`source printer.vim`
			`source env.vim`
			`source core.vim`

			`function READ(str)`
			`return ReadStr(a:str)`
			`endfunction`

			`function EVAL(ast, env)`
			`let ast = a:ast`
			`let env = a:env`

			`while 1`
Merge eval-ast and macro expansion into EVAL, add DEBUG-EVAL See issue #587. * Merge eval-ast and eval into a single conditional. * Expand macros during the apply phase, removing lots of duplicate tests, and increasing the overall consistency by allowing the macro to be computed instead of referenced by name (`((defmacro! cond (...)))` is currently illegal for example). * Print "EVAL: $ast" at the top of EVAL if DEBUG-EVAL exists in the MAL environment. * Remove macroexpand and quasiquoteexpand special forms. * Use pattern-matching style in process/step*.txt. Unresolved issues: c.2: unable to reproduce with gcc 11.12.0. elm: the directory is unchanged. groovy: sometimes fail, but not on each rebuild. nasm: fails some new soft tests, but the issue is unreproducible when running the interpreter manually. objpascal: unreproducible with fpc 3.2.2. ocaml: unreproducible with 4.11.1. perl6: unreproducible with rakudo 2021.09. Unrelated changes: Reduce diff betweens steps. Prevent defmacro! from mutating functions: c forth logo miniMAL vb. dart: fix recent errors and warnings ocaml: remove metadata from symbols. Improve the logo implementation. Encapsulate all representation in types.lg and env.lg, unwrap numbers. Replace some manual iterations with logo control structures. Reduce the diff between steps. Use native iteration in env_get and env_map Rewrite the reader with less temporary strings. Reduce the number of temporary lists (for example, reverse iteration with butlast requires O(n^2) allocations). It seems possible to remove a few exceptions: GC settings (Dockerfile), NO_SELF_HOSTING (IMPLS.yml) and step5_EXCLUDES (Makefile.impls) . 2022-01-10 00:15:40 +01:00
			`let dbgeval = env.get("DEBUG-EVAL")`
			`if !(empty(dbgeval) \|\| FalseQ(dbgeval) \|\| NilQ(dbgeval))`
			`call PrintLn("EVAL: " . PrStr(ast, 1))`
			`endif`

			`if SymbolQ(ast)`
			`let varname = ast.val`
			`let val = env.get(varname)`
			`if empty(val)`
			`throw "'" . varname . "' not found"`
			`endif`
			`return val`
			`elseif VectorQ(ast)`
			`return VectorNew(map(copy(ast.val), {_, e -> EVAL(e, env)}))`
			`elseif HashQ(ast)`
			`let ret = {}`
			`for [k,v] in items(ast.val)`
			`let newval = EVAL(v, env)`
			`let ret[k] = newval`
			`endfor`
			`return HashNew(ret)`
			`endif`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`if !ListQ(ast)`
Merge eval-ast and macro expansion into EVAL, add DEBUG-EVAL See issue #587. * Merge eval-ast and eval into a single conditional. * Expand macros during the apply phase, removing lots of duplicate tests, and increasing the overall consistency by allowing the macro to be computed instead of referenced by name (`((defmacro! cond (...)))` is currently illegal for example). * Print "EVAL: $ast" at the top of EVAL if DEBUG-EVAL exists in the MAL environment. * Remove macroexpand and quasiquoteexpand special forms. * Use pattern-matching style in process/step*.txt. Unresolved issues: c.2: unable to reproduce with gcc 11.12.0. elm: the directory is unchanged. groovy: sometimes fail, but not on each rebuild. nasm: fails some new soft tests, but the issue is unreproducible when running the interpreter manually. objpascal: unreproducible with fpc 3.2.2. ocaml: unreproducible with 4.11.1. perl6: unreproducible with rakudo 2021.09. Unrelated changes: Reduce diff betweens steps. Prevent defmacro! from mutating functions: c forth logo miniMAL vb. dart: fix recent errors and warnings ocaml: remove metadata from symbols. Improve the logo implementation. Encapsulate all representation in types.lg and env.lg, unwrap numbers. Replace some manual iterations with logo control structures. Reduce the diff between steps. Use native iteration in env_get and env_map Rewrite the reader with less temporary strings. Reduce the number of temporary lists (for example, reverse iteration with butlast requires O(n^2) allocations). It seems possible to remove a few exceptions: GC settings (Dockerfile), NO_SELF_HOSTING (IMPLS.yml) and step5_EXCLUDES (Makefile.impls) . 2022-01-10 00:15:40 +01:00			`return ast`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`end`
vimscript: Fix exception on literal empty list Issue #190 2016-03-27 22:12:19 -04:00			`if EmptyQ(ast)`
			`return ast`
			`endif`
Vimscript implementation 2015-10-20 15:02:00 -04:00
			`let first = ListFirst(ast)`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let first_symbol = SymbolQ(first) ? first.val : ""`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`if first_symbol == "def!"`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let a1 = ast.val[1]`
			`let a2 = ast.val[2]`
			`let ret = env.set(a1.val, EVAL(a2, env))`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`return ret`
			`elseif first_symbol == "let*"`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let a1 = ast.val[1]`
			`let a2 = ast.val[2]`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`let env = NewEnv(env)`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let let_binds = a1.val`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`let i = 0`
			`while i < len(let_binds)`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`call env.set(let_binds[i].val, EVAL(let_binds[i+1], env))`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`let i = i + 2`
			`endwhile`
			`let ast = a2`
			`" TCO`
			`elseif first_symbol == "if"`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let condvalue = EVAL(ast.val[1], env)`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`if FalseQ(condvalue) \|\| NilQ(condvalue)`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`if len(ast.val) < 4`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`return g:MalNil`
			`else`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let ast = ast.val[3]`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`endif`
			`else`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let ast = ast.val[2]`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`endif`
			`" TCO`
			`elseif first_symbol == "do"`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let astlist = ast.val`
Merge eval-ast and macro expansion into EVAL, add DEBUG-EVAL See issue #587. * Merge eval-ast and eval into a single conditional. * Expand macros during the apply phase, removing lots of duplicate tests, and increasing the overall consistency by allowing the macro to be computed instead of referenced by name (`((defmacro! cond (...)))` is currently illegal for example). * Print "EVAL: $ast" at the top of EVAL if DEBUG-EVAL exists in the MAL environment. * Remove macroexpand and quasiquoteexpand special forms. * Use pattern-matching style in process/step*.txt. Unresolved issues: c.2: unable to reproduce with gcc 11.12.0. elm: the directory is unchanged. groovy: sometimes fail, but not on each rebuild. nasm: fails some new soft tests, but the issue is unreproducible when running the interpreter manually. objpascal: unreproducible with fpc 3.2.2. ocaml: unreproducible with 4.11.1. perl6: unreproducible with rakudo 2021.09. Unrelated changes: Reduce diff betweens steps. Prevent defmacro! from mutating functions: c forth logo miniMAL vb. dart: fix recent errors and warnings ocaml: remove metadata from symbols. Improve the logo implementation. Encapsulate all representation in types.lg and env.lg, unwrap numbers. Replace some manual iterations with logo control structures. Reduce the diff between steps. Use native iteration in env_get and env_map Rewrite the reader with less temporary strings. Reduce the number of temporary lists (for example, reverse iteration with butlast requires O(n^2) allocations). It seems possible to remove a few exceptions: GC settings (Dockerfile), NO_SELF_HOSTING (IMPLS.yml) and step5_EXCLUDES (Makefile.impls) . 2022-01-10 00:15:40 +01:00			`for elt in astlist[1:-2]`
			`let ignored = EVAL(elt, env)`
			`endfor`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`let ast = astlist[-1]`
			`" TCO`
			`elseif first_symbol == "fn*"`
			`let fn = NewFn(ListNth(ast, 2), env, ListNth(ast, 1))`
			`return fn`
			`elseif first_symbol == "eval"`
			`let ast = EVAL(ListNth(ast, 1), env)`
			`let env = env.root()`
			`" TCO`
			`else`
			`" apply list`
Merge eval-ast and macro expansion into EVAL, add DEBUG-EVAL See issue #587. * Merge eval-ast and eval into a single conditional. * Expand macros during the apply phase, removing lots of duplicate tests, and increasing the overall consistency by allowing the macro to be computed instead of referenced by name (`((defmacro! cond (...)))` is currently illegal for example). * Print "EVAL: $ast" at the top of EVAL if DEBUG-EVAL exists in the MAL environment. * Remove macroexpand and quasiquoteexpand special forms. * Use pattern-matching style in process/step*.txt. Unresolved issues: c.2: unable to reproduce with gcc 11.12.0. elm: the directory is unchanged. groovy: sometimes fail, but not on each rebuild. nasm: fails some new soft tests, but the issue is unreproducible when running the interpreter manually. objpascal: unreproducible with fpc 3.2.2. ocaml: unreproducible with 4.11.1. perl6: unreproducible with rakudo 2021.09. Unrelated changes: Reduce diff betweens steps. Prevent defmacro! from mutating functions: c forth logo miniMAL vb. dart: fix recent errors and warnings ocaml: remove metadata from symbols. Improve the logo implementation. Encapsulate all representation in types.lg and env.lg, unwrap numbers. Replace some manual iterations with logo control structures. Reduce the diff between steps. Use native iteration in env_get and env_map Rewrite the reader with less temporary strings. Reduce the number of temporary lists (for example, reverse iteration with butlast requires O(n^2) allocations). It seems possible to remove a few exceptions: GC settings (Dockerfile), NO_SELF_HOSTING (IMPLS.yml) and step5_EXCLUDES (Makefile.impls) . 2022-01-10 00:15:40 +01:00			`let el = ListNew(map(copy(ast.val), {_, e -> EVAL(e, env)}))`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`let funcobj = ListFirst(el)`
			`let args = ListRest(el)`
			`if NativeFunctionQ(funcobj)`
			`return NativeFuncInvoke(funcobj, args)`
			`elseif FunctionQ(funcobj)`
vimscript: Remove calls to ObjValue 2016-10-26 06:46:20 +00:00			`let fn = funcobj.val`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`let ast = fn.ast`
			`let env = NewEnvWithBinds(fn.env, fn.params, args)`
			`" TCO`
			`else`
			`throw "Not a function"`
			`endif`
			`endif`
			`endwhile`
			`endfunction`

			`function PRINT(exp)`
			`return PrStr(a:exp, 1)`
			`endfunction`

			`function RE(str, env)`
			`return EVAL(READ(a:str), a:env)`
			`endfunction`

			`function REP(str, env)`
			`return PRINT(EVAL(READ(a:str), a:env))`
			`endfunction`

			`function GetArgvList()`
vimscript: Simplify ARGV setting using map and lambda 2016-10-25 22:43:28 +00:00			`return ListNew(map(copy(argv()[1:]), {_, arg -> StringNew(arg)}))`
Vimscript implementation 2015-10-20 15:02:00 -04:00			`endfunction`

			`set maxfuncdepth=10000`
			`let repl_env = NewEnv("")`

			`for [k, v] in items(CoreNs)`
			`call repl_env.set(k, v)`
			`endfor`

			`call repl_env.set("ARGV", GetArgvList())`

			`call RE("(def! not (fn* (a) (if a false true)))", repl_env)`
load-file: accept empty file or final comment, return nil Let `load-file` append a new line in case last line contains a comment. Also append `nil` so that the return value is predictible. Remove the existing explicit `nil` from existing sources. Adapt documentation and tests. 2019-07-15 23:57:02 +02:00			`call RE("(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \"\nnil)\")))))", repl_env)`
Vimscript implementation 2015-10-20 15:02:00 -04:00
			`if !empty(argv())`
			`call RE('(load-file "' . argv(0) . '")', repl_env)`
			`qall!`
			`endif`

			`while 1`
			`let [eof, line] = Readline("user> ")`
			`if eof`
			`break`
			`endif`
			`if line == ""`
			`continue`
			`endif`
			`try`
			`call PrintLn(REP(line, repl_env))`
			`catch`
			`call PrintLn("Error: " . v:exception)`
			`endtry`
			`endwhile`
			`qall!`