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4769962955
- Workarounds for Octave 4.0.0:
- no containers.Map yet so use new Dict
structure when running under Octave.
- weird error when +FOO/ directory and FOO.m file both exist so
rename types.m to type_utils.m
- no getReport so implement custom stack printer
- workaround weird issue that happens when a class initializer is
called with the first argument of the same class as per
Env(outer, ...). The class is not properly initialized. So for
now, wrap the outer in a cell as Env({outer}, ...)
- missing MException object types so when in Octave, use a global
variable to store the error object.
- missing native2unicode so just use 0xff character for keyword
prefix.
- workaround some function calling/passing differences. For
example, the "@" anonymous function symbol does not seem to work
for conveying an existing function but only for defininign a new
one. E.g. this works:
@(a,b) a+b
but this doesn't
@my_adder_fn.
so just do this:
@(a,b) my_adder_fn(a,b)
- Add Dockerfile with Octave
- Active Travis for matlab implementation using Octave
98 lines
2.3 KiB
Matlab
98 lines
2.3 KiB
Matlab
function step3_env(varargin), main(varargin), end
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% read
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function ret = READ(str)
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ret = reader.read_str(str);
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end
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% eval
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function ret = eval_ast(ast, env)
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switch class(ast)
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case 'types.Symbol'
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ret = env.get(ast);
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case 'types.List'
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ret = types.List();
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for i=1:length(ast)
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ret.append(EVAL(ast.get(i), env));
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end
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case 'types.Vector'
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ret = types.Vector();
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for i=1:length(ast)
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ret.append(EVAL(ast.get(i), env));
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end
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case 'types.HashMap'
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ret = types.HashMap();
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ks = ast.keys();
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for i=1:length(ks)
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k = ks{i};
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ret.set(EVAL(k, env), EVAL(ast.get(k), env));
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end
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otherwise
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ret = ast;
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end
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end
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function ret = EVAL(ast, env)
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%fprintf('EVAL: %s\n', printer.pr_str(ast, true));
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if ~type_utils.list_Q(ast)
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ret = eval_ast(ast, env);
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return;
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end
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% apply
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if isa(ast.get(1),'types.Symbol')
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a1sym = ast.get(1).name;
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else
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a1sym = '_@$fn$@_';
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end
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switch (a1sym)
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case 'def!'
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ret = env.set(ast.get(2), EVAL(ast.get(3), env));
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case 'let*'
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let_env = Env({env});
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for i=1:2:length(ast.get(2))
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let_env.set(ast.get(2).get(i), EVAL(ast.get(2).get(i+1), let_env));
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end
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ret = EVAL(ast.get(3), let_env);
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otherwise
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el = eval_ast(ast, env);
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f = el.get(1);
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args = el.data(2:end);
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ret = f(args{:});
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end
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end
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% print
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function ret = PRINT(ast)
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ret = printer.pr_str(ast, true);
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end
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% REPL
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function ret = rep(str, env)
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ret = PRINT(EVAL(READ(str), env));
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end
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function main(args)
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repl_env = Env();
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repl_env.set(types.Symbol('+'), @(a,b) a+b);
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repl_env.set(types.Symbol('-'), @(a,b) a-b);
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repl_env.set(types.Symbol('*'), @(a,b) a*b);
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repl_env.set(types.Symbol('/'), @(a,b) floor(a/b));
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%cleanObj = onCleanup(@() disp('*** here1 ***'));
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while (true)
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try
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line = input('user> ', 's');
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catch err
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return
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end
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if strcmp(strtrim(line),''), continue, end
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try
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fprintf('%s\n', rep(line, repl_env));
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catch err
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fprintf('Error: %s\n', err.message);
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type_utils.print_stack(err);
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end
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end
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end
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