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| author | Kartik K. Agaram <vc@akkartik.com> | 2021-04-29 23:53:28 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-04-29 23:53:28 -0700 |
| commit | 3385febc11dbe76ac86ef00992e7fdded19c58fc (patch) | |
| tree | 4976cfa64913ba32ff4a13d226534911e68f7427 /shell | |
| parent | d46c4b06b279e6dc43d2f8278cc91a8f2a137be4 (diff) | |
| download | mu-3385febc11dbe76ac86ef00992e7fdded19c58fc.tar.gz | |
shell: allow 'def' to overwrite
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/evaluate.mu | 2 | ||||
| -rw-r--r-- | shell/global.mu | 19 |
2 files changed, 7 insertions, 14 deletions
diff --git a/shell/evaluate.mu b/shell/evaluate.mu index 23ec8e3a..491a2022 100644 --- a/shell/evaluate.mu +++ b/shell/evaluate.mu @@ -199,7 +199,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel stream-to-array first-arg-data, tmp-ah var first-arg-data-string/eax: (addr array byte) <- lookup *tmp-ah var out2/edi: (addr handle cell) <- copy out - append-global globals, first-arg-data-string, *out2, trace + assign-or-create-global globals, first-arg-data-string, *out2, trace trace-higher trace return } diff --git a/shell/global.mu b/shell/global.mu index b736846f..75dfc60e 100644 --- a/shell/global.mu +++ b/shell/global.mu @@ -282,23 +282,16 @@ fn append-primitive _self: (addr global-table), name: (addr array byte) { new-primitive-function curr-value-ah, curr-index } -fn append-global _self: (addr global-table), name: (addr array byte), value: (handle cell), trace: (addr trace) { +fn assign-or-create-global _self: (addr global-table), name: (addr array byte), value: (handle cell), trace: (addr trace) { var self/esi: (addr global-table) <- copy _self + var curr-index/ecx: int <- find-symbol-name-in-globals self, name { - var curr-index/ecx: int <- find-symbol-name-in-globals self, name compare curr-index, -1/not-found - break-if-= - # otherwise error "global already exists: ", sym - var stream-storage: (stream byte 0x40) - var stream/ecx: (addr stream byte) <- address stream-storage - write stream, "global already exists: " - write stream, name - trace trace, "error", stream - return + break-if-!= + var final-index-addr/eax: (addr int) <- get self, final-index + increment *final-index-addr + curr-index <- copy *final-index-addr } - var final-index-addr/ecx: (addr int) <- get self, final-index - increment *final-index-addr - var curr-index/ecx: int <- copy *final-index-addr var data-ah/eax: (addr handle array global) <- get self, data var data/eax: (addr array global) <- lookup *data-ah var curr-offset/esi: (offset global) <- compute-offset data, curr-index |