dimgigov
fe3b1e8b6a
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Sessions 56–69: declarative macro! with rep/zip/literal/block and unhygienic var $name binders; partial field-move skip Drop; @[Release] polish; LSP type hierarchy; CI Nim cache + lean macOS + Windows smoke.
54 lines
1.3 KiB
Plaintext
54 lines
1.3 KiB
Plaintext
// C precedence safety: Bux AST must survive C codegen without rewrite.
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// Mul(Add(a,b), c) must stay (a+b)*c, not a+b*c.
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import Std::Io::{PrintLine};
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import Std::String::{String_FromInt};
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func MulSum(a: int, b: int, c: int) -> int {
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// AST: (a+b)*c → 9 for (1,2,3); wrong C emit gives 1+2*3=7
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return (a + b) * c;
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}
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func SubDiv(a: int, b: int, c: int) -> int {
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// AST: (a-b)/c → 3 for (10,4,2); wrong C emit gives 10-4/2=8
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return (a - b) / c;
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}
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func ShiftSum(a: int, b: int) -> int {
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// (a+b)<<1 → 6 for (1,2)
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return (a + b) << 1;
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}
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func Mix(a: int, b: int, c: int, d: int) -> int {
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// ((a+b)*c)-d → 7 for (1,2,3,2)
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return (a + b) * c - d;
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}
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func Main() -> int {
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let m: int = MulSum(1, 2, 3);
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let s: int = SubDiv(10, 4, 2);
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let sh: int = ShiftSum(1, 2);
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let x: int = Mix(1, 2, 3, 2);
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PrintLine(String_FromInt(m));
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PrintLine(String_FromInt(s));
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PrintLine(String_FromInt(sh));
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PrintLine(String_FromInt(x));
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if m != 9 {
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PrintLine("FAIL MulSum");
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return 1;
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}
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if s != 3 {
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PrintLine("FAIL SubDiv");
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return 1;
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}
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if sh != 6 {
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PrintLine("FAIL ShiftSum");
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return 1;
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}
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if x != 7 {
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PrintLine("FAIL Mix");
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return 1;
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}
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PrintLine("PASS c_precedence");
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return 0;
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}
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